Method, device and system for monitoring concentration of petroleum pollutants

Abstract

The invention discloses a petroleum pollutant concentration monitoring method, device and system. The method comprises the following steps: in response to received numerical values of a plurality of sensitive environment factors of a target point location, determining the petroleum pollutant concentration of the target point location at a corresponding monitoring moment by using a pre-established relationship between the plurality of sensitive environment factors and the petroleum pollutant concentration; wherein the sensitive environment factors are sensitive environment factors of the petroleum pollutant concentration, and the numerical values of the plurality of sensitive environment factors are monitored by the sensor arranged at the target point at the corresponding monitoring moment. According to the method, the concentration of the petroleum pollutants can be determined in real time based on the sensitive environmental factors monitored by the sensor in real time, and rapid estimation and long-term monitoring of the migration process of the petroleum pollutants can be conveniently achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental pollution monitoring and assessment, and in particular to a method, device and system for monitoring the concentration of petroleum pollutants. Background Art

[0002] Petrochemical industry involves all aspects of people's lives. Economic development has promoted the diversified development of petrochemical enterprises, but it has also led to the continuous generation of petrochemical pollution sites.

[0003] Monitored Natural Attenuation (MNA) refers to the use of various physical, chemical and biological processes that occur naturally in contaminated areas under the implementation of a planned monitoring strategy to reduce the concentration, quantity, volume, toxicity and mobility of pollutants. Application results show that MNA technology can not only continue the cleanup process of petroleum pollutants in soil and groundwater, significantly reduce cleanup costs, but also protect human health and environmental safety, reduce environmental risks, and has strong applicability in the remediation of petroleum contaminated sites.

[0004] At present, the identification methods of petroleum pollutants in the monitoring of natural attenuation process are mainly primary, intermediate and advanced evidence. The methods for obtaining primary evidence (pollutant concentration) and intermediate evidence (environmental indicators, hydrogeochemical indicators) are mainly concentrated in drilling monitoring, geophysical detection, numerical simulation, etc. However, limited by site conditions and monitoring costs, these methods are difficult to achieve long-term monitoring or rapid estimation of pollutant migration processes in practical applications, which brings many inconveniences to the implementation of natural attenuation remediation technology for monitoring petroleum contaminated sites. Summary of the invention

[0005] The inventors found that the process of reducing the concentration of petroleum pollutants and the degree of pollution through physical, chemical and biological reactions will significantly affect the environmental factors of the aeration zone-aquifer system, including water content (θ), conductivity (EC), pH and redox potential (ORP), and the changes in these environmental factors will also react to the occurrence, migration and degradation of pollutants. After the petroleum pollutants leak and infiltrate to the edge of the capillary zone, the NAPL phase pollutants displace the water in the medium and migrate downward, the pollutant saturation increases, and the water content shows a decreasing trend. Since there is a positive correlation between the water content and conductivity of the medium, the infiltration process of NAPL phase pollutants displaces water and also causes the conductivity to show the same change trend as the water content. The aerobic microbial degradation of petroleum pollutants reduces the oxygen content in the soil, increases the carbon dioxide content, and decreases the nitrate content, thereby changing the redox conditions (ORP), acid-base conditions (pH) and conductivity (EC) of the soil environment.

[0006] In view of the fact that the physical, chemical and biological effects of petroleum pollutants will affect environmental factors during the natural attenuation process, a quantitative relationship can be established between environmental factors and the concentration of petroleum pollutants, thereby realizing the inversion of petroleum pollutant concentrations in the natural attenuation process by changes in environmental factors and determining the natural attenuation stage of pollution.

[0007] In order to at least partially solve the technical problems existing in the prior art, the inventors have made the present invention, and through specific implementation methods, provide a method, device and system for monitoring the concentration of petroleum pollutants, which can determine the concentration of petroleum pollutants in real time based on sensitive environmental factors obtained in real time by multi-parameter sensors, and can conveniently realize rapid estimation and long-term monitoring of the migration process of petroleum pollutants.

[0008] In a first aspect, an embodiment of the present invention provides a method for monitoring the concentration of petroleum pollutants, comprising:

[0009] In response to the received values ​​of multiple sensitive environmental factors of the target point, the concentration of petroleum pollutants at the target point at the corresponding monitoring time is determined by utilizing the pre-established relationship between the multiple sensitive environmental factors and the concentration of petroleum pollutants; wherein the sensitive environmental factor is a sensitive environmental factor of the concentration of petroleum pollutants, and the values ​​of the multiple sensitive environmental factors are monitored by the sensor set at the target point at the corresponding monitoring time.

[0010] In some embodiments, the relationship between the multiple sensitive environmental factors and the concentration of petroleum pollutants is pre-established in the following manner:

[0011] According to the values ​​of multiple set environmental factors at multiple times of the set point monitored by the sensor, and the concentration of petroleum pollutants obtained by sampling and testing from the set point at the corresponding time, the correlation analysis between each set environmental factor and the concentration of petroleum pollutants is performed to screen out multiple sensitive environmental factors of the concentration of petroleum pollutants, and the set point and the target point are in the same organic polluted site;

[0012] Through fitting methods, the relationship between multiple sensitive environmental factors and the concentration of petroleum pollutants was established.

[0013] In some embodiments, the multiple sensitive environmental factors include conductivity, pH, and redox potential.

[0014] In some embodiments, establishing the relationship between multiple sensitive environmental factors and petroleum pollutant concentrations includes:

[0015] The relationship between multiple sensitive environmental factors and the concentration of petroleum pollutants is established as follows:

[0016]

[0017] In the formula, C TPH To predict the concentration of petroleum pollutants at the monitoring time, C0 is the concentration of petroleum pollutants at the initial monitoring time, t is the time from the monitoring time to the initial monitoring time, pH, EC and ORP are the values ​​of pH, conductivity and redox potential of the set point at the monitoring time, respectively, and A, B, C and D are different fitting parameters.

[0018] In some embodiments, the correlation analysis between each set environmental factor and the concentration of petroleum pollutants is performed to screen out multiple sensitive environmental factors of the concentration of petroleum pollutants, including:

[0019] The Spearman correlation coefficient method was used to conduct correlation analysis between each set environmental factor and the concentration of petroleum pollutants. Environmental factors with a correlation coefficient of no less than 0.01 with the concentration of petroleum pollutants were screened as sensitive environmental factors of the concentration of petroleum pollutants, and multiple sensitive environmental factors were obtained.

[0020] In some embodiments, the sensor includes a multi-parameter sensor and an oxidation-reduction potential sensor;

[0021] The multi-parameter sensor can at least monitor conductivity and pH.

[0022] In some embodiments, it also includes:

[0023] According to the concentration of petroleum pollutants at each monitoring moment in a set time period, the attenuation process of the petroleum pollutants at the target point in the set time period is analyzed.

[0024] In some embodiments, it also includes:

[0025] If the currently determined petroleum pollutant concentration is higher than the preset concentration threshold, an alarm message is generated.

[0026] In a second aspect, an embodiment of the present invention provides a device for monitoring the concentration of petroleum pollutants, the device comprising a memory and a processor; the memory is used to store a program for monitoring the concentration of petroleum pollutants, the processor is used to read and execute the program for monitoring the concentration of petroleum pollutants, and execute any of the above-mentioned methods for monitoring the concentration of petroleum pollutants.

[0027] In a third aspect, an embodiment of the present invention provides a petroleum pollutant concentration monitoring system, including an environmental factor monitoring unit, a data acquisition unit and a monitoring cloud platform;

[0028] The environmental factor monitoring unit is used to monitor the values ​​of multiple petroleum pollutant sensitive environmental factors at the target point to obtain monitoring data;

[0029] The data acquisition unit is used to receive the monitoring data sent by the environmental factor monitoring unit in real time and send it to the monitoring cloud platform;

[0030] The monitoring cloud platform is used to execute any of the above-mentioned petroleum pollutant concentration monitoring methods.

[0031] In some embodiments, the multi-parameter sensor of the environmental factor monitoring unit has a conductivity measurement range of 0 to 20,000 μS / cm and a measurement accuracy of ±2% μS / cm.

[0032] In some embodiments, the multi-parameter sensor of the environmental factor monitoring unit has a pH measurement range of 3 to 10 pH and a measurement accuracy of ±0.2 pH.

[0033] In some embodiments, the set frequency is 8 to 12 times per second.

[0034] In some embodiments, the monitoring cloud platform is also used to:

[0035] The current display color is updated according to the currently determined petroleum pollutant concentration and the set correspondence between the petroleum pollutant concentration and the display color.

[0036] In some embodiments, the monitoring cloud platform is also used to:

[0037] If the currently determined petroleum pollutant concentration is higher than the preset concentration threshold, an alarm message is issued.

[0038] In a fourth aspect, an embodiment of the present invention provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions, when executed by a processor, implement the above-mentioned petroleum pollutant concentration monitoring method.

[0039] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0040] (1) The petroleum pollutant concentration monitoring method provided by the embodiment of the present invention pre-establishes the relationship between multiple petroleum pollutant sensitive environmental factors and petroleum pollutant concentrations. Based on the relationship, the petroleum pollutant concentration can be conveniently determined according to the values ​​of the petroleum pollutant sensitive environmental factors received in real time. The method converts a large amount of low-value environmental monitoring data into high-value pollutant concentration data, realizes the characterization and long-term monitoring of the natural attenuation and restoration process of petroleum pollutants. Compared with traditional sampling test analysis, the method is more convenient and faster, and the monitoring cost is low.

[0041] (2) The petroleum pollutant concentration monitoring method provided by the embodiment of the present invention analyzes the petroleum pollutant attenuation process at the target point within the set time period according to the petroleum pollutant concentration at each monitoring time within the set time period, which effectively solves the problem of difficulty in characterizing the natural attenuation process.

[0042] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0043] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 This is a schematic diagram of the structure of a petroleum pollutant concentration monitoring system in Embodiment 1 of the present invention;

[0046] Figure 2 This is a schematic diagram of a display interface in a monitoring cloud platform of a petroleum pollutant concentration monitoring system in Embodiment 1 of the present invention;

[0047] Figure 3 This is a specific implementation flow chart of the method for monitoring the concentration of petroleum pollutants in Embodiment 2 of the present invention;

[0048] Figure 4 This is a graph showing the temperature variation over time in the environmental factor in the second embodiment of the present invention;

[0049] Figure 5 This is a graph showing changes in the oxidation-reduction potential ORP, pH, volumetric water content D0, and petroleum pollutant concentration over time in Example 2 of the present invention. DETAILED DESCRIPTION

[0050] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0051] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0052] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the invention belongs. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0053] In view of the problem that it is difficult to quickly obtain pollutant concentrations during the natural attenuation and remediation process of petroleum contaminated sites, and the acquisition cost is high, the embodiments of the present invention provide a method, device and system for monitoring the concentration of petroleum pollutants, which can determine the concentration of petroleum pollutants in real time based on sensitive environmental factors obtained by sensors in real time, and can conveniently realize rapid estimation and long-term monitoring of the migration process of petroleum pollutants.

[0054] Embodiment 1

[0055] Embodiment 1 of the present invention provides a petroleum pollutant concentration monitoring system, the structure of which is shown in FIG. Figure 1 As shown, it includes an environmental factor monitoring unit 1, a data acquisition unit 2 and a monitoring cloud platform 3.

[0056] The environmental factor monitoring unit 1 is used to detect the values ​​of multiple sensitive environmental factors of the petroleum pollutant concentration at the target point at a set frequency to obtain monitoring data.

[0057] The environmental factor monitoring unit is provided with a multi-parameter sensor, which can at least monitor conductivity and pH.

[0058] In some embodiments, the environmental factor monitoring unit is further provided with an oxidation-reduction potential sensor.

[0059] In some embodiments, the multi-parameter sensor can be a four-parameter sensor of temperature, volumetric water content, conductivity and pH. The multi-parameter sensor has a temperature measurement range of 30-70°C with a measurement accuracy of ±0.2°C; a water content measurement range of 0-100% with a measurement accuracy of ±2%; a conductivity measurement range of 0-20000μS / cm with a measurement accuracy of ±2%μS / cm; and a pH measurement range of 3-10pH with a measurement accuracy of ±0.2pH.

[0060] The monitoring frequency of the environmental factor monitoring unit 1 may be 8 to 12 times per second.

[0061] The data collection unit 2 is used to receive the monitoring data sent by the environmental factor monitoring unit 1 in real time and send it to the monitoring cloud platform 3.

[0062] For example, the sensors of the environmental factor monitoring unit may be connected to the data acquisition unit through the navigation sockets according to the numbers.

[0063] The data acquisition unit can be a 485 communication data acquisition module equipped with the international Modbus-RTU standard protocol; a 485 data output port is reserved to connect to the indoor LED display screen 4 to display real-time data of various parameters.

[0064] The monitoring cloud platform 3 is used to implement the petroleum pollutant concentration monitoring method. The specific implementation process will be described in detail in the subsequent embodiment 2.

[0065] Specifically, the monitoring cloud platform 3 is an Internet of Things monitoring cloud platform, and communication and data transmission between the data collection unit 2 and the monitoring cloud platform 3 are achieved through a 4G network.

[0066] The collected data of the monitoring cloud platform 3 can be stored and refreshed every 10 minutes, and the data access is in CSV format; the data of each environmental factor of each sensor in each time period can be observed on the monitoring cloud platform 3.

[0067] In some embodiments, the monitoring cloud platform 3 is further used for:

[0068] Update the current display color according to the currently determined petroleum pollutant concentration and the set correspondence between the petroleum pollutant concentration and the display color, see Figure 2 As shown; if the currently determined petroleum pollutant concentration is higher than the preset concentration threshold, an alarm message is issued.

[0069] In some embodiments, the monitoring cloud platform 3 is also used to establish the relationship between multiple petroleum pollutant sensitive environmental factors and petroleum pollutant concentrations, and the specific process is described in detail in Example 2.

[0070] Embodiment 2

[0071] Embodiment 2 of the present invention provides a method for monitoring the concentration of petroleum pollutants, comprising:

[0072] In response to the received values ​​of multiple sensitive environmental factors of the target point, the petroleum pollutant concentration of the target point at the corresponding monitoring time is determined by using the pre-established relationship between the multiple sensitive environmental factors and the petroleum pollutant concentration.

[0073] Among them, the sensitive environmental factors are sensitive environmental factors of petroleum pollutant concentrations. The values ​​of multiple sensitive environmental factors are monitored by sensors set at target points at corresponding monitoring times. Specifically, they are monitored by the environmental factor monitoring unit in the petroleum pollutant concentration monitoring system of Example 1.

[0074] The environmental factor monitoring unit may include a multi-parameter sensor and an oxidation-reduction potential sensor, the monitoring frequencies of the two sensors are consistent, and the initial time of each monitoring is consistent, so the monitoring data at the same time can be obtained.

[0075] The relationship between multiple petroleum pollutant sensitive environmental factors and petroleum pollutant concentrations is pre-established through the following steps:

[0076] According to the values ​​of multiple set environmental factors at multiple time points monitored by the sensors, and the concentration of petroleum pollutants obtained by sampling and testing from the set points at the corresponding time points, the correlation analysis between each set environmental factor and the concentration of petroleum pollutants is performed respectively, and multiple sensitive environmental factors of the concentration of petroleum pollutants are screened out; through the fitting method, the relationship between multiple sensitive environmental factors and the concentration of petroleum pollutants is established.

[0077] Among them, the above-mentioned set point and the target point are in the same organic pollution site; preferably, the set point is the target point; but based on monitoring time and monitoring cost, etc., the relationship between multiple sensitive environmental factors and petroleum pollutant concentrations established by experimental data of a set point is often used as a reference for multiple target points in the same site.

[0078] Reference Figure 3 As shown, petroleum pollutant concentration monitoring can include the following steps:

[0079] Step S31: bury the sensor at the set point to ensure that the sensor probe is free from dirt interference.

[0080] Specifically, the sensor includes a multi-parameter sensor and an oxidation-reduction potential sensor. The multi-parameter sensor can be a four-parameter sensor of temperature, volumetric water content, conductivity and pH.

[0081] Step S32: Connect the sensors to the data acquisition unit according to the numbers through the navigation sockets.

[0082] Step S33: obtaining the values ​​of multiple environmental factors at multiple time points at the set points monitored by the sensor, and the concentration of petroleum pollutants obtained by sampling and testing from the set points at the same time.

[0083] That is, multiple sets of data are obtained, each set of data includes the values ​​of multiple set environmental factors and the concentration of petroleum pollutants at a set point at a set time; the number of data sets is not less than 10.

[0084] The data monitoring range is set on the IoT monitoring cloud platform, and the collected data is stored and refreshed every 10 minutes; the data of each environmental parameter of each sensor in each time period can be observed on the cloud platform.

[0085] The multiple set environmental factors are multiple environmental factors that may be strongly correlated with the concentration of petroleum pollutants, and may include water content, electrical conductivity, pH, and redox potential.

[0086] join Figure 4 The figure shows the temperature change over time in the environmental factor. Figure 5 As shown, it is a graph showing the changes in oxidation-reduction potential ORP, pH, volumetric water content D0, and petroleum pollutant concentration over time.

[0087] Step S34: performing correlation analysis between each set environmental factor and the concentration of petroleum pollutants to screen sensitive environmental factors of petroleum pollutants.

[0088] The Spearman correlation coefficient method was used to conduct correlation analysis between each set environmental factor and the concentration of petroleum pollutants. Environmental factors with a correlation coefficient of no less than 0.01 with the concentration of petroleum pollutants were screened as sensitive environmental factors of the concentration of petroleum pollutants, and multiple sensitive environmental factors were obtained.

[0089] The multiple set environmental factors may include temperature, water content, electrical conductivity, pH value and redox potential; the multiple petroleum pollutant sensitive environmental factors screened out include electrical conductivity, pH value and redox potential.

[0090] Step S35: Establishing the relationship between the sensitive environmental factors of petroleum pollutants and the concentration of petroleum pollutants by means of fitting method.

[0091]

[0092] In the formula, C TPHis the predicted concentration of petroleum pollutants at the monitoring time, mg / kg; C0 is the concentration of petroleum pollutants at the initial monitoring time, mg / kg; t is the time from the monitoring time to the initial monitoring time, d; pH, EC and ORP are the values ​​of acidity, conductivity and redox potential of the set point at the monitoring time respectively; A, B, C and D are all fitting parameters.

[0093] Furthermore, the initial in the above initial monitoring time refers to a relative initial time, rather than an absolute initial time, that is, the start time of each monitoring time period is set as the initial time.

[0094] The petroleum pollutant concentration monitoring method provided by the embodiment of the present invention pre-establishes the relationship between multiple petroleum pollutant sensitive environmental factors and petroleum pollutant concentrations. Based on the relationship, the petroleum pollutant concentration can be conveniently determined according to the values ​​of the petroleum pollutant sensitive environmental factors received in real time. The method converts a large amount of low-value environmental monitoring data into high-value pollutant concentration data, realizes the characterization and long-term monitoring of the natural attenuation and restoration process of petroleum pollutants, and is more convenient and faster than traditional sampling test analysis, and has low monitoring costs.

[0095] In some embodiments, the method may further include: analyzing the attenuation process of the petroleum pollutants at the target point within the set time period according to the concentration of the petroleum pollutants at each monitoring moment within the set time period, which effectively solves the problem that it is difficult to characterize the natural attenuation process.

[0096] Based on the inventive concept of the present invention, an embodiment of the present invention also provides a device for monitoring the concentration of petroleum pollutants, which includes a memory and a processor; the memory is used to store a program for monitoring the concentration of petroleum pollutants, and the processor is used to read and execute the program for monitoring the concentration of petroleum pollutants, and execute the above-mentioned method for monitoring the concentration of petroleum pollutants.

[0097] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0098] Based on the inventive concept of the present invention, an embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by a processor, the above-mentioned petroleum pollutant concentration monitoring method is implemented.

[0099] Unless otherwise specifically stated, terms such as processing, computing, calculating, determining, displaying, etc. may refer to the actions and / or processes of one or more processing or computing systems, or similar devices, which operate and convert data represented as physical (e.g., electronic) quantities within registers or memories of a processing system into other data similarly represented as physical quantities within memories, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0100] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0101] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that an embodiment of the claimed subject matter requires more features than those set forth in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0102] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0103] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also be present in a user terminal as discrete components.

[0104] For software implementation, the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is coupled to the processor in a communication manner via various means, which are well known in the art.

[0105] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A method for monitoring the concentration of petroleum pollutants, characterized in that: include: In response to the received values ​​of multiple sensitive environmental factors of the target point, the concentration of petroleum pollutants at the target point at the corresponding monitoring time is determined by utilizing the pre-established relationship between the multiple sensitive environmental factors and the concentration of petroleum pollutants; wherein the sensitive environmental factor is a sensitive environmental factor of the concentration of petroleum pollutants, and the values ​​of the multiple sensitive environmental factors are monitored by the sensor set at the target point at the corresponding monitoring time.

2. The method according to claim 1, characterized in that The relationship between the multiple sensitive environmental factors and the concentration of petroleum pollutants is pre-established in the following manner: According to the values ​​of multiple set environmental factors at multiple times of the set point monitored by the sensor, and the concentration of petroleum pollutants obtained by sampling and testing from the set point at the corresponding time, the correlation analysis between each set environmental factor and the concentration of petroleum pollutants is performed to screen out multiple sensitive environmental factors of the concentration of petroleum pollutants, and the set point and the target point are in the same organic polluted site; Through fitting methods, the relationship between multiple sensitive environmental factors and the concentration of petroleum pollutants was established.

3. The method according to claim 2, characterized in that The multiple sensitive environmental factors include conductivity, pH and redox potential.

4. The method according to claim 3, characterized in that The relationship between multiple sensitive environmental factors and the concentration of petroleum pollutants is established, including: The relationship between multiple sensitive environmental factors and the concentration of petroleum pollutants is established as follows: In the formula, C TPH To predict the concentration of petroleum pollutants at the monitoring time, C0 is the concentration of petroleum pollutants at the initial monitoring time, t is the time from the monitoring time to the initial monitoring time, pH, EC and ORP are the values ​​of pH, conductivity and redox potential of the set point at the monitoring time, respectively, and A, B, C and D are different fitting parameters.

5. The method according to claim 2, characterized in that: The correlation analysis between each set environmental factor and the concentration of petroleum pollutants is performed to screen out multiple sensitive environmental factors of the concentration of petroleum pollutants, including: The Spearman correlation coefficient method was used to conduct correlation analysis between each set environmental factor and the concentration of petroleum pollutants. Environmental factors with a correlation coefficient of no less than 0.01 with the concentration of petroleum pollutants were screened as sensitive environmental factors of the concentration of petroleum pollutants, and multiple sensitive environmental factors were obtained.

6. The method according to any one of claims 1 to 5, characterized in that: The sensor includes a multi-parameter sensor and an oxidation-reduction potential sensor; The multi-parameter sensor can at least monitor conductivity and pH.

7. The method according to any one of claims 1 to 5, characterized in that: Also includes: According to the concentration of petroleum pollutants at each monitoring moment in a set time period, the attenuation process of the petroleum pollutants at the target point in the set time period is analyzed.

8. The method according to any one of claims 1 to 5, characterized in that: Also includes: If the currently determined petroleum pollutant concentration is higher than the preset concentration threshold, an alarm message is generated.

9. A petroleum pollutant concentration monitoring device, characterized in that: The device includes a memory and a processor; the memory is used to store a program for monitoring the concentration of petroleum pollutants, and the processor is used to read and execute the program for monitoring the concentration of petroleum pollutants and execute the method for monitoring the concentration of petroleum pollutants as described in any one of claims 1 to 8.

10. A petroleum pollutant concentration monitoring system, characterized in that: It includes environmental factor monitoring unit, data collection unit and monitoring cloud platform; The environmental factor monitoring unit is used to detect the values ​​of multiple sensitive environmental factors of the petroleum pollutant concentration at the target point at a set frequency to obtain monitoring data; The data acquisition unit is used to receive the monitoring data sent by the environmental factor monitoring unit in real time and send it to the monitoring cloud platform; The monitoring cloud platform is used to execute the petroleum pollutant concentration monitoring method according to any one of claims 1 to 8 to obtain the petroleum pollutant concentration at the target point at each monitoring time.

11. The system according to claim 10, characterized in that The multi-parameter sensor of the environmental factor monitoring unit has a conductivity measurement range of 0 to 20,000 μS / cm and a measurement accuracy of ±2% μS / cm.

12. The system according to claim 10, characterized in that The multi-parameter sensor of the environmental factor monitoring unit has a pH measurement range of 3 to 10 pH and a measurement accuracy of ±0.2 pH.

13. The system according to claim 10, characterized in that The set frequency is 8 to 12 times per second.

14. The system according to claim 10, characterized in that The monitoring cloud platform is also used for: The current display color is updated according to the currently determined petroleum pollutant concentration and the set correspondence between the petroleum pollutant concentration and the display color.

15. The system according to claim 14, characterized in that The monitoring cloud platform is also used for: If the currently determined petroleum pollutant concentration is higher than the preset concentration threshold, an alarm message is issued.

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