Online Monitoring System for Total Thallium in Water Quality

Abstract

The present application discloses an online monitoring system for total thallium in water quality. The online monitoring system for total thallium in water quality includes: a water quality sampling module for periodically sampling water quality samples; a total thallium detection module for detecting the total thallium content in the water quality samples according to a preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene; and a result output module for generating and outputting the monitoring result of total thallium in water quality according to the total thallium content. The present application solves the technical problem of poor timeliness in monitoring total thallium in water quality in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of water quality monitoring, and particularly relates to an on-line monitoring system for total thallium in water quality. Background Art

[0002] With the rapid industrialization and urbanization development in China, environmental problems such as high energy consumption, high emissions, and high pollution have gradually emerged. Among them, the problem of water pollution has become increasingly serious. Therefore, real-time monitoring of water quality has become increasingly important. Thallium is one of the most toxic heavy metal elements in the environment. After thallium enters the water body, it dissolves in water or accumulates in organisms or sinks into the sediment through physical, chemical, and biological actions, and enters the human body through drinking water, diet, etc., endangering people's physical health. The detection methods for total thallium in water quality are mostly atomic absorption method, potentiometric stripping analysis method, inductively coupled plasma mass spectrometry method, etc., which have relatively high requirements for detection equipment and detection personnel. Therefore, at present, the monitoring method for total thallium in water quality is to regularly sample and send it to the laboratory for detection by professional detection personnel. However, this regular sampling method has a long detection cycle and poor timeliness. Summary of the Invention

[0003] The main purpose of the present application is to provide an on-line monitoring system for total thallium in water quality, aiming to solve the technical problem of poor timeliness in monitoring total thallium in water quality in the prior art.

[0004] To achieve the above object, the present application provides an on-line monitoring system for total thallium in water quality, and the on-line monitoring system for total thallium in water quality includes:

[0005] A water quality collection module, configured to regularly collect water quality samples;

[0006] A total thallium detection module, configured to detect the total thallium content in the water quality sample according to a preset spectrophotometry method based on o-hydroxybenzenediazoaminoazobenzene;

[0007] A result output module, configured to generate and output the monitoring result of total thallium in water quality according to the total thallium content.

[0008] Optionally, the total thallium detection module includes:

[0009] A first sample injection unit, configured to measure a preset sampling amount of an initial sample from the water quality sample and input the initial sample and a detection reagent into a first reactor corresponding to a first reaction unit;

[0010] The first reaction unit is used to receive the initial sample and the detection reagent input by the first sampling unit through the first reactor, and stir the mixture in the first reactor through the first stirring device during the input process for 3 - 30 s and then let it stand for 3 - 10 min to make the mixture in the first reactor stratified, where the lower layer is the sample to be detected;

[0011] The first detection unit is used to detect the absorbance of the sample to be detected at a wavelength of 350 - 450 nm;

[0012] The first data processing unit is used to calculate the total thallium content in the water quality sample according to the sampling volume, the sample absorbance and a preset standard curve.

[0013] Optionally, the detection reagent includes: a masking agent, an o - hydroxy phenyl diazoaminoazobenzene solution, a surfactant and an extractant.

[0014] Optionally, the step of receiving the initial sample and the detection reagent input by the first sampling unit through the first reactor, and stirring the mixture in the first reactor through the first stirring device during the input process for 3 - 30 s and then letting it stand for 3 - 10 min to make the mixture in the first reactor stratified, where the lower layer is the sample to be detected, includes:

[0015] Receiving the initial sample, the masking agent and the surfactant input by the first sampling unit through the first reactor, blowing and mixing the mixture in the first reactor through the first air - blowing pump, and stirring the mixture in the first reactor through the first stirring device. After blowing and stirring for 3 - 30 s, receiving the o - hydroxy phenyl diazoaminoazobenzene solution input by the first sampling unit, blowing and mixing the mixture in the first reactor through the first air - blowing pump, and stirring the mixture in the first reactor through the first stirring device. After blowing and stirring for 3 - 30 s, receiving the extractant input by the first sampling unit, blowing and mixing the mixture in the first reactor through the first air - blowing pump, and stirring the mixture in the first reactor through the first stirring device. After blowing and stirring for 3 - 30 s, stopping the first air - blowing pump and the first stirring device, and letting it stand for 3 - 10 min to make the mixture in the first reactor stratified, where the lower layer is the sample to be detected.

[0016] Optionally, the first reaction unit includes a first reactor, the first detection unit includes a first colorimetric cell, the lower end of the first reactor is connected to the upper end of the first colorimetric cell, and the first colorimetric cell is a cuboid with a length of 1 - 5 cm and a width of 1 - 5 cm.

[0017] Optionally, the on-line monitoring system for total thallium in the water quality further includes:

[0018] A standard curve drawing module, which is used to detect the absorbance of at least one standard solution to be detected according to the preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene, and draw a standard curve of the total thallium content in the water quality according to the standard solution concentration and the standard solution absorbance of each standard solution to be detected.

[0019] Optionally, the standard curve drawing module includes:

[0020] A second sampling unit, which measures a standard solution and pure water according to a preset standard solution concentration, and inputs each standard solution, each pure water, and a detection reagent into a second reactor corresponding to the second reaction unit;

[0021] A second reaction unit, which is used to receive the standard solution, the pure water, and the detection reagent input by the second sampling unit through the second reactor, and stir the mixture input into the second reactor by a second stirring device during the input process for 3 - 30 s and let it stand for 3 - 10 min to make the mixture in the second reactor stratified, where the lower layer is the standard solution to be detected;

[0022] A second detection unit, which is used to detect the standard solution absorbance of the standard solution to be detected at a wavelength of 350 - 450 nm;

[0023] A second data processing unit, which is used to draw a standard curve of the total thallium content in the water quality according to the standard solution concentration and the standard solution absorbance.

[0024] Optionally, the on-line monitoring system for total thallium in the water quality further includes:

[0025] An alarm module, which is used to give an alarm when it is detected that the total thallium content is greater than a preset threshold.

[0026] Optionally, the on-line monitoring system for total thallium in the water quality further includes:

[0027] A storage module, which is used to store the on-line monitoring results of total thallium in the water quality;

[0028] And / or a reporting module, which is used to send and report the on-line monitoring results of total thallium in the water quality to an external device.

[0029] Optionally, the step of regularly collecting water quality samples includes:

[0030] Obtaining the regularly detected time input by the user;

[0031] Collecting water quality samples through a peristaltic pump at intervals of the regularly detected time.

[0032] The present application provides an on-line monitoring system for total thallium in water quality. Through the water quality sampling module, water quality samples are collected regularly, realizing the regular collection of water quality samples. Furthermore, through the total thallium detection module, according to the preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene, the total thallium content in the water quality samples is detected, realizing the rapid detection of the total thallium content in the water quality samples. Furthermore, through the result output module, based on the total thallium content, the monitoring result of total thallium in water quality is generated and output, realizing the output display of the monitoring result of the total thallium content in the water quality samples. The spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene is simple, has low requirements for detection equipment and detection personnel, can be automated through machines and programs, can complete the collection and detection of water quality samples on-site at the water quality sample collection site, without the need for specialized personnel to go to the location of the water quality samples for sampling and then send them to the laboratory for detection. It can improve the sampling and detection frequency, and thus can detect the pollution situation of total thallium in water quality in a timely manner, overcoming the technical problem of poor timeliness in monitoring total thallium in water quality in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application.

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a schematic structural diagram of an embodiment of the on-line monitoring system for total thallium in water quality of the present application;

[0036] Figure 2 It is a schematic connection structure diagram of a first reactor and a first colorimetric cell in the on-line monitoring system for total thallium in water quality of the present application;

[0037] Figure 3 It is a schematic scenario diagram of an implementable mode of the on-line monitoring system for total thallium in water quality of the present application.

[0038] Explanation of the reference numerals in the drawings:

[0039] Label Name Label Name 10 Water quality sampling module 20 Total thallium detection module 30 Result output module 11 Water pump 12 Metering device 21 Reactor 22 Stirring device 23 Colorimetric cell 24 Drainage pump 40 Storage tank 50 Multi-way valve

[0040] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0042] The embodiment of the present application provides an on-line monitoring system for total thallium in water quality. In the first embodiment of the on-line monitoring system for total thallium in water quality of the present application, refer to Figure 1 , the on-line monitoring system for total thallium in water quality includes:

[0043] A water quality collection module 10 for regularly collecting water quality samples;

[0044] A total thallium detection module 20 for detecting the total thallium content in the water quality sample according to a preset spectrophotometric method based on o-hydroxybenzenediazoaminoazobenzene;

[0045] A result output module 30 for generating and outputting the monitoring result of total thallium in water quality according to the total thallium content.

[0046] In this embodiment, it should be noted that the water quality collection module 10 may include, but is not limited to, a delivery pipeline, a water pump, a water quality sample storage tank, a filter membrane, a timer, and / or a metering device, etc. The metering device is a device for quantitatively measuring a certain volume of liquid.

[0047] Specifically, the water quality collection module 10 is connected to an external water source through a delivery pipeline. The water quality collection module 10 regularly sucks the water of the external water source into the water quality sample storage tank of the on-line monitoring system through a water pump to obtain a water quality sample. The water pump includes a peristaltic pump, a vacuum pump, a metering pump, etc.

[0048] In an implementable manner, the water quality collection module 10 may further include a filtering unit for filtering the external water source one or more times, and storing the filtered water quality sample in the water quality sample storage tank for inspection. In an implementable manner, multiple filtrations may be sequentially performed using filter membranes with gradually decreasing pore sizes. For example, multiple filter membranes with gradually decreasing pore sizes are sequentially arranged in the pipeline from the water inlet direction to the water outlet direction, so that the water flows from the filter membrane with a larger pore size to the filter membrane with a smaller pore size in sequence, thereby ensuring that the impurity content of the finally obtained water quality sample meets the detection requirements, and effectively avoiding blockage or rupture of the filter membrane due to too small pore size when there are more impurities or larger particle sizes.

[0049] Optionally, the step of regularly collecting water quality samples includes:

[0050] Obtain the timing detection time input by the user;

[0051] Collect water quality samples through a peristaltic pump at intervals of the timing detection time.

[0052] In this embodiment, specifically, obtain the timing detection time set and input by the user in the online monitoring system. For example, 30 min, 2 h, 1 day, or on-the-hour test, etc. The water quality collection module 10 starts timing after each time the peristaltic pump is started to collect water quality samples. When the timing reaches the timing detection time, the peristaltic pump is started again to collect water quality samples.

[0053] The total thallium detection module 20 may include but is not limited to: a first sample injection unit, a first reaction unit, a first detection unit, a first data processing unit, a delivery pipeline, a reagent storage tank, and / or a pure water storage tank, etc. The spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene is to use the coordination reaction between o-hydroxybenzenediazoaminoazobenzene and thallium to generate a metal complex. The reaction process shows an obvious color change. The total thallium in the water quality sample is extracted and enriched, and a metal complex is generated with o-hydroxybenzenediazoaminoazobenzene. Then, at the wavelength corresponding to the color of the generated metal complex, absorbance detection is carried out and compared with the absorbance of the thallium standard solution, so as to determine the total thallium content in the water quality sample.

[0054] Specifically, the total thallium detection module 20 controls the first sampling unit to measure a preset sampling amount of water quality sample from the water quality sample storage tank as an initial sample according to the detection procedure corresponding to the preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene, and inputs the initial sample into the first reactor. It measures the detection reagent from the preset reagent storage tank and inputs the detection reagent into the first reactor. It measures pure water from the preset pure water storage tank and inputs the pure water into the first reactor. It controls the first reaction unit to receive the initial sample and the detection reagent input by the first sampling unit through the first reactor, and during the input process of the initial sample, the detection reagent and the pure water, stir the mixture in the first reactor through the first stirring device for 3 - 30 s to make the mixture in the first reactor fully mixed and react. Then stop the first stirring device to make the mixture in the first reactor stand still for 3 - 10 min, so that the mixture in the first reactor is layered. Among them, the lower layer is the sample to be detected. Then, the absorbance of the sample to be detected is detected by the first detection unit installed on the first reactor. The first data processing unit is controlled to calculate the total thallium content in the water quality sample according to the sampling amount, the sample absorbance and the preset standard curve. Among them, the mixture is the substances input into the first reactor, including the initial sample, pure water and / or detection reagent, etc. The stirring time of the stirring is 3 - 30 s, which can be specifically set or adjusted according to the actual situation, such as 3 s, 18 s, 30 s, etc. The standing time of the standing still is 3 - 10 min, which can be specifically set or adjusted according to the actual situation, such as 3 min, 7 min, 10 min, etc. The detection wavelength of the sample absorbance is 350 - 450 nm, which can be specifically set or adjusted according to the actual situation, such as 350 nm, 380 nm, 450 nm, etc. The standard curve can be received from an external device or preset in advance, or the absorbance of the standard solution can be detected through the preset standard curve drawing module and the standard curve can be drawn.

[0055] It is easy to understand that although the total thallium content in the water quality may be high or low and cannot be predicted, which leads to the concentration of the water quality sample not necessarily being within the concentration range of the standard curve. The concentration range of the standard curve can be set as the target detection range. If the total thallium concentration is lower than the concentration range of the standard curve, it indicates that the water quality is good and no warning is needed. If the total thallium concentration is higher than the concentration range of the standard curve, it indicates that the water quality may exceed the safe range or seriously exceed the safe range, and a warning is needed. Thus, it can better monitor the total thallium content in the water quality.

[0056] Optionally, the total thallium detection module 20 includes:

[0057] The first sampling unit is used to measure an initial sample with a preset sampling volume from the water quality sample and input the initial sample and a detection reagent into the first reactor corresponding to the first reaction unit;

[0058] The first reaction unit is used to receive the initial sample and the detection reagent input by the first sampling unit through the first reactor, and stir the mixture in the first reactor through the first stirring device during the input process for 3 - 30 s and then let it stand for 3 - 10 min to make the mixture in the first reactor stratified, where the lower layer is the sample to be detected;

[0059] The first detection unit is used to detect the sample absorbance of the sample to be detected at a wavelength of 350 - 450 nm;

[0060] The first data processing unit is used to calculate the total thallium content in the water quality sample according to the sampling volume, the sample absorbance and a preset standard curve.

[0061] In this embodiment, it should be noted that the first sampling unit includes but is not limited to: a metering device, a transfer pipeline, a reagent storage tank and / or a pure water storage tank, etc.

[0062] Specifically, a water quality sample with a preset sampling volume is measured from the water quality sample storage tank as the initial sample through the first sampling unit, and the initial sample is input into the first reactor. A detection reagent is measured from a preset reagent storage tank and input into the first reactor. Pure water is measured from a preset pure water storage tank and input into the first reactor.

[0063] Optionally, the detection reagent includes: a masking agent, an o - hydroxybenzenediazoaminoazobenzene solution, a surfactant and an extractant. Among them, the masking agent includes potassium sodium tartrate, ammonium citrate, etc. The masking agent is used to shield other metal ions except thallium in the mixture in the first reactor to reduce the reaction of other metal ions except thallium with o - hydroxybenzenediazoaminoazobenzene and affect the subsequent absorbance detection. The surfactant includes Triton X - 100, Tween 80, Triton 214, sodium dodecylbenzenesulfonate and / or sodium dodecyl sulfate, etc. The extractant is an organic solvent with a density greater than that of water and insoluble or slightly soluble in water, such as chloroform, etc. The masking agent, the o - hydroxybenzenediazoaminoazobenzene solution, the surfactant and the extractant are all in a solution state, and the specific concentration can be configured and adjusted according to the actual situation, or more than one kind and / or different concentrations of solutions can be set to adapt to different situations. This embodiment does not limit this. For example, if there are more interfering ions in the water quality sample, the amount of the masking agent can be considered to be increased.

[0064] The first reaction unit includes, but is not limited to: a first reactor, a first stirring device, a first air blowing pump, an automatic detection device, and / or a transfer pipeline, etc.

[0065] Specifically, the first reactor receives the initial sample and the detection reagent input by the first sample introduction unit, starts the first stirring device, stirs the mixture in the first reactor for 3 - 30 s, so that the mixture in the first reactor is fully mixed and reacts, stops the first stirring device, and allows the mixture in the first reactor to stand still for 3 - 10 min, thereby causing the mixture in the first reactor to be stratified. Among them, the lower layer is the sample to be detected. The mixture is the substance input into the first reactor, including the initial sample, pure water, and / or the detection reagent, etc. The stirring time of the stirring is 3 - 30 s, and specifically, it can be set or adjusted according to the actual situation, such as 3 s, 18 s, 30 s, etc. The standing time of the standing still is 3 - 10 min, and specifically, it can be set or adjusted according to the actual situation, such as 3 min, 7 min, 10 min, etc.

[0066] Optionally, the step of receiving, by the first reactor, the initial sample and the detection reagent input by the first sample introduction unit, and stirring the mixture in the first reactor by the first stirring device during the input process for 3 - 30 s and standing still for 3 - 10 min to cause the mixture in the first reactor to be stratified, where the lower layer is the sample to be detected, includes:

[0067] The first reactor receives the initial sample, the masking agent, and the surfactant input by the first sample introduction unit, blows and mixes the mixture in the first reactor by the first air blowing pump, and stirs the mixture in the first reactor by the first stirring device. After blowing and stirring for 3 - 30 s, it receives the o - hydroxybenzenediazoaminoazobenzene solution input by the first sample introduction unit, blows and mixes the mixture in the first reactor by the first air blowing pump, and stirs the mixture in the first reactor by the first stirring device. After blowing and stirring for 3 - 30 s, it receives the extractant input by the first sample introduction unit, blows and mixes the mixture in the first reactor by the first air blowing pump, and stirs the mixture in the first reactor by the first stirring device. After blowing and stirring for 3 - 30 s, it stops the first air blowing pump and the first stirring device, and stands still for 3 - 10 min to cause the mixture in the first reactor to be stratified, where the lower layer is the sample to be detected.

[0068] In this embodiment, specifically, the first reactor receives the initial sample, the masking agent, and the surfactant input by the first sampling unit. The first air blowing pump and the first stirring device are turned on. The mixture in the first reactor is blown by the first air blowing pump, and the mixture in the first reactor is stirred by the first stirring device. Blowing and stirring are carried out for 3 - 30 s to fully mix and react the mixture in the first reactor. Then, the solution of o-hydroxyphenyl diazoaminoazobenzene input by the first sampling unit is received, and blowing and stirring are carried out for 3 - 30 s to fully mix and react the mixture in the first reactor. Then, the extractant input by the first sampling unit is received, and blowing and stirring are carried out for 3 - 30 s to dissolve the thallium-containing compound in the mixture in the first reactor into the extractant, thereby realizing the extraction of thallium. Then, the first air blowing pump and the first stirring device are stopped, and the mixture in the first reactor is allowed to stand for 3 - 10 min to stratify the mixture in the first reactor, where the lower layer is the sample to be detected.

[0069] The first detection unit includes, but is not limited to, a small ultraviolet spectrophotometer, a first colorimetric cell, etc.

[0070] Specifically, the first colorimetric cell receives the sample to be detected in the lower layer after automatic extraction and stratification by the first reaction unit. The absorbance of the sample to be detected is detected by a small ultraviolet spectrophotometer. The detection wavelength of the sample absorbance is 350 - 450 nm, and it can be specifically set or adjusted according to the actual situation, such as 350 nm, 380 nm, 450 nm, etc.

[0071] Optionally, referring to Figure 2 , Figure 2 is a schematic connection structure diagram of the first reactor and the first colorimetric cell in the on-line monitoring system for total thallium in water quality of this application. The first reaction unit includes a first reactor 21, and the first detection unit includes a first colorimetric cell 23. The lower end of the first reactor 21 is connected to the upper end of the first colorimetric cell 23. The first colorimetric cell 23 is a cuboid with a length of 1 - 5 cm and a width of 1 - 5 cm.

[0072] In this embodiment, specifically, the first reaction unit includes a first reactor 21, and the first detection unit includes a first colorimetric cell 23. The lower end of the first reactor 21 is connected to the upper end of the first colorimetric cell 23. That is, the first reactor 21 and the first colorimetric cell 23 are connected to form a container with a smooth side wall that is larger at the top and smaller at the bottom. The first colorimetric cell 21 is a cuboid with a length of 1 - 5 cm and a width of 1 - 5 cm, such as a cuboid with a length of 1 cm and a width of 1 cm, a cuboid with a length of 1 cm and a width of 2 cm, a cuboid with a length of 4 cm and a width of 1 cm, a cuboid with a length of 3 cm and a width of 3 cm, a cuboid with a length of 2 cm and a width of 5 cm, a cuboid with a length of 5 cm and a width of 3 cm, etc., and can be specifically set according to actual needs.

[0073] The first data processing unit establishes a communication connection between the first detection unit and the first sampling unit respectively, obtains the sample absorbance detected by the first detection unit and the sampling volume of the initial sample measured by the first sampling unit, substitutes the sample absorbance into a preset standard curve to obtain the total thallium concentration of the sample to be detected, and calculates the total thallium content in the water quality sample according to the total thallium concentration, the sampling volume, and the preset total volume of the sample to be detected.

[0074] In an implementable manner, the total thallium detection module 20 further includes a first cleaning unit, and the first cleaning unit at least includes a drain pump and a waste liquid storage tank. The first cleaning unit is used to discharge the mixture in the first reactor and the first colorimetric cell through the drain pump and collect it in the waste liquid storage tank after the first detection unit detects the sample absorbance each time, and add pure water to the first reactor and the first colorimetric cell at least once to clean the first reactor and the first colorimetric cell to avoid interference caused by residual mixture to the next detection.

[0075] The result output module 30, a communication connection is established between the result output module 30 and the total thallium detection module 20. The result output module 30 obtains the total thallium content detected by the total thallium detection module 20, and generates and outputs the total thallium monitoring result in the water quality. Among them, the total thallium monitoring result may include, but is not limited to: total thallium content, sampling time, detection time, and / or the determination result of whether the total thallium content exceeds a preset threshold.

[0076] In an implementable manner, the result output module 30 can also be used to compare the total thallium content with a preset threshold. When the total thallium content is greater than the preset threshold, the total thallium monitoring result corresponding to the total thallium content is highlighted to facilitate the user to quickly and conveniently view the abnormal data situation.

[0077] Optionally, the on-line monitoring system for total thallium in water quality further includes:

[0078] An alarm module, which is used to give an alarm when the total thallium content is detected to be greater than a preset threshold.

[0079] In this embodiment, specifically, a communication connection is established between the alarm module and the total thallium detection module 20, the total thallium content detected by the total thallium detection module 20 is obtained, and the total thallium content is compared with a preset threshold. If the total thallium content is greater than the preset threshold, an alarm is given. Among them, the ways of giving an alarm include sending an alarm message to an external device to prompt that the total thallium content in the water quality exceeds the standard, emitting alarm light or alarm prompt sound through an alarm lamp or a buzzer, etc.

[0080] Optionally, the on-line monitoring system for total thallium in water quality further includes:

[0081] A storage module, which is used to store the on-line monitoring results of total thallium in water quality;

[0082] And / or a reporting module, which is used to send and report the on-line monitoring results of total thallium in water quality to an external device.

[0083] In this embodiment, specifically, a communication connection is established between the storage module and the detection module 20, the on-line monitoring results of total thallium in water quality are obtained and stored. The storage module may include, but is not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memories), optical fibers, portable compact disk read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0084] The reporting module establishes a communication connection with the detection module 20, exchanges data by wireless or wired communication with an external device, and sends and reports the on-line monitoring results of total thallium in water quality to the external device.

[0085] In an implementable manner, refer to Figure 3 , Figure 3It is a schematic diagram of a scenario of an implementable mode of the on-line monitoring system for total thallium in the water quality. The multi-way valve 50 is connected to the conveying pipelines in the on-line monitoring system for total thallium in the water quality and controls the opening and closing of each conveying pipeline to achieve directional transmission between various devices. The water pump 11 is connected to an external water source through a conveying pipeline. The water pump 11 is connected to the metering device 12. The water pump 11 combines with the metering device 12 to quantitatively suck the water from the external water source into the water quality sample storage tank in the storage tank 40 of the on-line monitoring system for total thallium in the water quality. The water quality sample, standard solution, reagent, and / or pure water are conveyed to the container composed of the reactor 21 and the colorimetric cell 23 through the conveying pipeline. The stirring device 22 is started for stirring. After standing and stratifying, the sample to be detected or the standard solution to be detected is in the lower layer and fills the colorimetric cell 23. The detection device detects the absorbance of the sample to be detected or the standard solution to be detected in the colorimetric cell 23. After the detection device finishes the detection, the drain pump 22 discharges the mixture in the colorimetric cell 23 and the reactor 21 through the pipeline below the colorimetric cell 23 into the waste liquid storage tank in the storage tank 40.

[0086] In this embodiment, through the water quality sampling module, the water quality samples are collected regularly, realizing the regular collection of water quality samples. Furthermore, through the total thallium detection module, according to the preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene, the total thallium content in the water quality samples is detected, realizing the rapid detection of the total thallium content in the water quality samples. Furthermore, through the result output module, based on the total thallium content, the on-line monitoring result of total thallium in the water quality is generated and output, realizing the output display of the on-line monitoring result of the total thallium content in the water quality samples. The spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene is simple in method, has low requirements for detection equipment and detection personnel, can be realized by machine and program for automated operation, can complete the collection and detection of water quality samples on-site at the water quality sample collection site through the on-line monitoring system, without the need for special personnel to go to the place of water quality samples for sampling and then send them to the laboratory for detection. It can improve the sampling and detection frequency, and then can detect the pollution situation of total thallium in the water quality in time, overcoming the technical problem of poor timeliness of monitoring total thallium in the water quality in the prior art.

[0087] Furthermore, in another embodiment of the on-line monitoring system for total thallium in the water quality of the present application, the on-line monitoring system for total thallium in the water quality further includes:

[0088] A standard curve drawing module, which is used to detect the absorbance of at least one standard solution to be detected according to the preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene, and draw a standard curve of the total thallium content in the water quality according to the standard solution concentration and standard solution absorbance of each standard solution to be detected.

[0089] In this embodiment, it should be noted that the standard curve drawing module may include, but is not limited to: a second sample injection unit, a second reaction unit, a second detection unit, a second data processing unit, a delivery pipeline, a standard solution storage tank, a reagent storage tank, and / or a pure water storage tank, etc. The spectrophotometry based on o-hydroxyphenyl diazoaminoazobenzene is to use the coordination of o-hydroxyphenyl diazoaminoazobenzene with thallium to generate a metal complex. The reaction process shows an obvious color change. The total thallium in the water quality sample is extracted and enriched, and a metal complex is formed with o-hydroxyphenyl diazoaminoazobenzene. Then, at the wavelength corresponding to the color of the generated metal complex, the absorbance is detected and compared with the absorbance of the standard solution of thallium, and the total thallium content in the water quality sample can be determined.

[0090] Specifically, the standard curve drawing module determines the concentration of at least one standard solution corresponding to the standard curve according to the preset detection procedure corresponding to the spectrophotometry based on o-hydroxyphenyl diazoaminoazobenzene, measures the standard solution from the standard solution storage tank according to the concentration of each standard solution, and inputs the standard solution into the second reactor. It measures the detection reagent from the preset reagent storage tank and inputs the detection reagent into the second reactor. It measures pure water from the preset pure water storage tank and inputs the pure water into the second reactor. During the process of inputting the initial sample, detection reagent, and pure water, the mixture input into the second reactor is stirred by the second stirring device for 3 - 30 s, so that the mixture in the first reactor is fully mixed and reacts. Then, the first stirring device is stopped, and the mixture in the first reactor is allowed to stand for 3 - 10 min, so that the mixture in the first reactor is layered. Among them, the lower layer is the standard solution to be detected. Then, the standard solution absorbance of the standard solution to be detected is detected by the second detection unit installed on the second detection device. The concentration and absorbance of the standard solution are input into the standard curve model until all the concentration and absorbance of the standard solutions corresponding to the standard curve have input specific parameters. According to the concentration and corresponding absorbance of each standard solution input into the standard curve target, a standard curve is generated and a regression equation is obtained. Among them, the mixture is the substance input into the second reactor, including the standard solution, pure water, and / or detection reagent. The stirring time of the stirring is 3 - 30 s, and specifically can be set or adjusted according to the actual situation, such as 3 s, 18 s, 30 s, etc. The standing time of the standing is 3 - 10 min, and specifically can be set or adjusted according to the actual situation, such as 3 min, 7 min, 10 min, etc. The detection wavelength of the sample absorbance is 350 - 450 nm, and specifically can be set or adjusted according to the actual situation, such as 350 nm, 380 nm, 450 nm, etc.

[0091] Optionally, the standard curve drawing module includes:

[0092] A second sample injection unit that measures a standard solution and pure water according to a preset standard solution concentration, and inputs each of the standard solutions, each of the pure waters, and a detection reagent into a second reactor corresponding to the second reaction unit;

[0093] A second reaction unit that is used to receive the standard solution, the pure water, and the detection reagent input by the second sample injection unit through the second reactor, and stir the mixture input into the second reactor by a second stirring device during the input process for 3 - 30 s and then stand for 3 - 10 min to allow the mixture in the second reactor to be layered, where the lower layer is the standard solution to be detected;

[0094] A second detection unit that is used to detect the absorbance of the standard solution of the standard solution to be detected at a wavelength of 350 - 450 nm;

[0095] A second data processing unit that is used to draw a standard curve of the total thallium content in water quality according to the standard solution concentration and the absorbance of the standard solution.

[0096] In this embodiment, it should be noted that the second sample injection unit includes but is not limited to: a metering device, a transmission pipeline, a standard solution storage tank, a reagent storage tank, and / or a pure water storage tank, etc.

[0097] Specifically, the volumes of the standard solution and the pure water to be measured are determined according to the preset standard solution concentration, the standard solution is measured from the standard solution storage tank and input into the second reactor, the detection reagent is measured from the preset reagent storage tank and input into the second reactor, and the pure water is measured from the preset pure water storage tank and input into the second reactor.

[0098] Optionally, the detection reagent includes: a masking agent, an o-hydroxyphenyl diazoaminoazobenzene solution, a surfactant, and an extractant. Among them, the masking agent includes potassium sodium tartrate, ammonium citrate, etc. The masking agent is used to shield other metal ions except thallium in the mixture in the first reactor, so as to reduce the reaction of other metal ions except thallium with o-hydroxyphenyl diazoaminoazobenzene and affect the subsequent detection of absorbance. The surfactant includes Triton X-100, Tween 80, Triton 214, sodium dodecylbenzenesulfonate, and / or sodium dodecyl sulfate, etc. The extractant is an organic solvent with a density greater than that of water and insoluble or slightly soluble in water, such as chloroform, etc. The masking agent, the o-hydroxyphenyl diazoaminoazobenzene solution, the surfactant, and the extractant are all in a solution state, and the specific concentration can be configured and adjusted according to the actual situation, or more than one kind and / or different concentrations of solutions can be set to adapt to different situations. This embodiment does not limit this. For example, if there are more interfering ions, the amount of the masking agent can be considered to be increased.

[0099] The second reaction unit includes but is not limited to: a second reactor, a second stirring device, a transfer pipeline, and / or a second air pump, etc.

[0100] Specifically, the second reactor receives the standard solution and the detection reagent input by the second sampling unit, starts the second stirring device, stirs the mixture input into the second reactor for 3 - 30 s, so that the mixture in the first reactor is fully mixed and reacts, stops the first stirring device, and allows the mixture in the first reactor to stand for 3 - 10 min, so as to make the mixture in the first reactor stratified. Among them, the lower layer is the standard solution to be detected. The mixture is the substance input into the second reactor, including the standard solution, pure water, and / or the detection reagent, etc. The stirring time of the stirring is 3 - 30 s, and specifically can be set or adjusted according to the actual situation, such as 3 s, 18 s, 30 s, etc. The standing time of the standing is 3 - 10 min, and specifically can be set or adjusted according to the actual situation, such as 3 min, 7 min, 10 min, etc.

[0101] Optionally, the step of receiving the standard solution, the pure water, and the detection reagent input by the second sampling unit through the second reactor and stirring the mixture input into the second reactor for 3 - 30 s and standing for 3 - 10 min during the input process to make the mixture in the second reactor stratified, where the lower layer is the standard solution to be detected, includes:

[0102] Receive the standard solution, the masking agent, and the surfactant input by the second sample introduction unit through the second reactor. Blow and mix the mixture in the second reactor through the second air blowing pump, and stir the mixture in the second reactor through the second stirring device. After blowing and stirring for 3 - 30 s, receive the o-hydroxyphenyl diazoaminoazobenzene solution input by the second sample introduction unit. Blow and mix the mixture in the second reactor through the second air blowing pump, and stir the mixture in the second reactor through the second stirring device. After blowing and stirring for 3 - 30 s, receive the extractant input by the second sample introduction unit. Blow and mix the mixture in the second reactor through the second air blowing pump, and stir the mixture in the second reactor through the second stirring device. After blowing and stirring for 3 - 30 s, stop the second air blowing pump and the second stirring device, and let it stand for 3 - 10 min to allow the mixture in the second reactor to separate into layers, where the lower layer is the standard solution to be detected.

[0103] The second detection unit includes but is not limited to: a small ultraviolet spectrophotometer and / or a second colorimetric cell, etc.

[0104] Specifically, receive the standard solution to be detected in the lower layer after automatic extraction and separation of the second reaction unit through the second colorimetric cell, and detect the absorbance of the standard solution of the standard solution to be detected through a small ultraviolet spectrophotometer. The detection wavelength of the absorbance of the standard solution is 350 - 450 nm, and specifically can be set or adjusted according to the actual situation, such as 350 nm, 380 nm, 450 nm, etc.

[0105] Optionally, the second reactor includes a second reactor, the second detection unit includes a second colorimetric cell, the lower end of the second reactor is connected to the upper end of the second colorimetric cell, and the second colorimetric cell is a cuboid with a length of 1 - 5 cm and a width of 1 - 5 cm.

[0106] In this embodiment, specifically, the second reactor includes a second reactor, the second detection unit includes a second colorimetric cell, the lower end of the second reactor is connected to the upper end of the second colorimetric cell, that is, the second reactor and the second colorimetric cell are connected to form a container with a large upper part and a small lower part and a smoothly transitioning side wall. The second colorimetric cell is a cuboid with a length of 1 - 5 cm and a width of 1 - 5 cm, such as a cuboid with a length of 1 cm and a width of 1 cm, a cuboid with a length of 1 cm and a width of 2 cm, a cuboid with a length of 4 cm and a width of 1 cm, a cuboid with a length of 3 cm and a width of 3 cm, a cuboid with a length of 2 cm and a width of 5 cm, a cuboid with a length of 5 cm and a width of 3 cm, etc., and can be specifically set according to actual needs.

[0107] The second data processing unit establishes communication connections with the second detection unit and the second sampling unit respectively, obtains the absorbance of the standard solution detected by the second detection unit, and draws a standard curve for the total thallium content in the water quality according to the standard solution concentration and the absorbance of the standard solution.

[0108] In an implementable manner, the standard curve drawing module further includes a second cleaning unit. The second cleaning unit is used to discharge the mixture in the second reactor and the second colorimetric cell into the waste liquid storage tank after the second detection unit detects the absorbance of the sample each time, and add pure water to the second reactor and the second colorimetric cell at least once to clean the second reactor and the second colorimetric cell, so as to avoid the residue of the mixture interfering with the next detection.

[0109] It should be noted that the second sampling unit and the first sampling unit may be the same or different, the second reaction unit and the first reaction unit may be the same or different, the second detection unit and the first detection unit may be the same or different, and the second data processing unit and the first data processing unit may be the same or different. That is, each hardware device corresponding to the standard curve drawing module, such as a reactor, a stirring device, a conveying pipeline, a colorimetric cell, a small ultraviolet spectrophotometer, etc., may be the same as or different from each hardware device corresponding to the total thallium detection module, and may also be partially the same and partially different. For example, the first reactor and the second reactor are two separate reactors, but share the same set of detection reagent storage tanks and detection units, etc. This embodiment does not limit this.

[0110] In this embodiment, using the same batch of detection reagents, pure water and detection equipment to draw the standard curve results in smaller errors and higher accuracy in actually detecting the total thallium content in the water quality sample. Moreover, the standard curve can be drawn regularly, realizing the automation of the entire process of online monitoring of the total thallium in the water quality.

[0111] It should be understood that each part of the present disclosure can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0112] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An on-line monitoring system for total thallium in water quality, characterized in that, The on-line monitoring system for total thallium in water quality includes: A water quality sampling module for regularly sampling water quality samples; A total thallium detection module; A result output module for generating and outputting the monitoring result of total thallium in water quality according to the total thallium content; The total thallium detection module includes: A first sample injection unit for measuring a preset sampling amount of an initial sample from the water quality sample and inputting the initial sample and a detection reagent into a first reactor corresponding to a first reaction unit. The detection reagent includes: a masking agent, an o-hydroxybenzenediazoaminoazobenzene solution, a surfactant, and an extractant; A first reaction unit for receiving the initial sample, the masking agent, and the surfactant input by the first sample injection unit through the first reactor, blowing and mixing the mixture in the first reactor by a first air blowing pump, and stirring the mixture in the first reactor by a first stirring device. After blowing and stirring for 3 - 30 s, receiving the o-hydroxybenzenediazoaminoazobenzene solution input by the first sample injection unit, blowing and mixing the mixture in the first reactor by the first air blowing pump, and stirring the mixture in the first reactor by the first stirring device. After blowing and stirring for 3 - 30 s, receiving the extractant input by the first sample injection unit, blowing and mixing the mixture in the first reactor by the first air blowing pump, and stirring the mixture in the first reactor by the first stirring device. After blowing and stirring for 3 - 30 s, stopping the first air blowing pump and the first stirring device, and standing for 3 - 10 min to make the mixture in the first reactor stratified, wherein the lower layer is the sample to be detected; A first detection unit for detecting the sample absorbance of the sample to be detected at a wavelength of 350 - 450 nm; A first data processing unit for calculating the total thallium content in the water quality sample according to the sampling amount, the sample absorbance, and a preset standard curve; 2. The on-line monitoring system for total thallium in water quality according to claim 1, characterized in that The first reaction unit includes a first reactor, the first detection unit includes a first colorimetric cell, the lower end of the first reactor is connected to the upper end of the first colorimetric cell, and the first colorimetric cell is a cuboid with a length of 1 - 5 cm and a width of 1 - 5 cm; 3. The on-line monitoring system for total thallium in water quality according to claim 1, characterized in that The on-line monitoring system for total thallium in water quality further includes: A standard curve drawing module for detecting the absorbance of at least one standard solution to be detected according to a preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene, and drawing a standard curve of the total thallium content in water quality according to the standard solution concentration and the standard solution absorbance of each standard solution to be detected; 4. The on-line monitoring system for total thallium in water quality according to claim 3, characterized in that, The standard curve drawing module includes: A second sample injection unit for measuring a standard solution and pure water according to a preset standard solution concentration, and inputting each standard solution, each pure water, and a detection reagent into a second reactor corresponding to a second reaction unit; A second reaction unit, which is used to receive the standard solution, the pure water and the detection reagent input by the second sample introduction unit through a second reactor, and stir the mixture input into the second reactor by a second stirring device during the input process for 3 - 30 s and then let it stand for 3 - 10 min to make the mixture in the second reactor stratified, wherein the lower layer is the standard solution to be detected; A second detection unit, which is used to detect the absorbance of the standard solution to be detected at a wavelength of 350 - 450 nm; A second data processing unit, which is used to draw a standard curve of the total thallium content in the water quality according to the standard solution concentration and the absorbance of the standard solution.

5. The on-line monitoring system for total thallium in water quality according to any one of claims 1-4, characterized in that, The on-line monitoring system for the total thallium in the water quality further includes: An alarm module, which is used to give an alarm when it is monitored that the total thallium content is greater than a preset threshold.

6. The on-line monitoring system for total thallium in water quality according to any one of claims 1-4, characterized in that, The on-line monitoring system for the total thallium in the water quality further includes: A storage module, which is used to store the on-line monitoring results of the total thallium in the water quality; And / or a reporting module, which is used to send and report the on-line monitoring results of the total thallium in the water quality to an external device.

7. The on-line monitoring system for total thallium in water quality according to any one of claims 1-4, characterized in that, The steps of collecting water quality samples regularly include: Obtaining the regularly detected time input by the user; Collecting water quality samples through a peristaltic pump at intervals of the regularly detected time.

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