Water pollution source quantitative tracing method and device

Abstract

The invention relates to a quantitative source tracing method and device for a water pollution source, and the method comprises the steps: detecting the concentrations of soluble organic carbon of samples of a target water body section, a main pollution source and a non-main pollution source, and detecting the molecular composition and molecular strength of soluble organic matters in the samples through a non-target ultrahigh-resolution mass spectrum; main pollution source representative pollution molecules which belong to the target water body cross section, are main pollution sources and do not belong to non-main pollution sources are screened out; generating a fitting curve of the representative pollution molecules of the main pollution source according to the intensity of the representative pollution molecules of the main pollution source and the concentration of the soluble organic carbon; calculating the contribution rate of the main pollution source to the dissolved organic matters of the water body, and quantitatively tracing the pollution source of the water body according to the contribution rate of the dissolved organic matters. According to the method, DOM is taken as a gripper, DOM molecular composition and molecular strength characteristics of a pollution source are obtained, and quantitative tracing of pollution is realized by screening representative pollution molecules and calculating contribution of the pollution source to water pollution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water environmental pollution source tracing, and in particular to a water pollution source quantitative tracing method and device. BACKGROUND

[0002] Precise pollution control, scientific pollution control and pollution control by law are the basic principles of current environmental governance, and source supervision and control are the key to precise pollution control. Pollution source tracing has become a major demand in the field of ecological environment. Existing water pollution source tracing technologies, including conventional water quality parameter grid method, stable isotope method, characteristic pollutant method, microbial fingerprint method, water quality fluorescence fingerprint method and molecular fingerprint method, are mainly used for qualitative source tracing, i.e., identifying the main source of water pollution, but it is difficult to analyze the contribution of the main pollution source to water pollution.

[0003] In the above methods, the conventional water quality parameter grid method can quantify the degree of water pollution, but cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameter of the water body. The stable isotope method is expensive and can only roughly distinguish between domestic, agricultural and industrial sources, and it is difficult to achieve quantitative source tracing. The characteristic pollutant method can estimate the contribution of the pollution source according to the concentration of the characteristic pollutant, but the types of characteristic pollutants of different pollution sources differ greatly, and the testing method is complex and inefficient in actual application. The microbial fingerprint method is only suitable for scenarios involving fecal pollution such as domestic sewage and aquaculture wastewater, and can only infer the type of the main pollution source based on genetic material abundance, making it difficult to achieve quantitative pollution contribution. The water quality fluorescence fingerprint method has been widely used in water pollution source tracing, but it is still mainly used for qualitative source tracing, and no mature quantitative method and application has been found. The molecular fingerprint method is based on the similarities and differences between different samples to determine the main pollution source of the water body, and further, according to the changes in the content of different molecules in the pollution source and the water body, the quantitative source tracing of the pollution source can be achieved.

[0004] In order to achieve the demand for precise pollution control, widely applicable and reliable pollution source quantitative tracing technology is urgently needed. SUMMARY

[0005] The present application provides a water pollution source quantitative tracing method and device to solve the problems that the related art cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameter of the water body, cannot achieve quantitative source tracing, the testing method is complex and inefficient in actual application, and cannot achieve quantitative pollution contribution.

[0006] The first aspect of this application provides a method for quantitatively tracing water pollution sources, comprising the following steps: detecting the dissolved organic carbon concentration of samples from a target water body section, major pollution sources, and non-major pollution sources, and using non-targeted ultra-high resolution mass spectrometry to detect the molecular composition and molecular intensity of dissolved organic matter in the samples; based on the molecular composition and molecular intensity of dissolved organic matter in the samples, screening out representative pollutant molecules belonging to the target water body section, the major pollution source, but not the non-major pollution source; based on the set of representative pollutant molecules from the major pollution source, generating a fitting curve of the representative pollutant molecules from the major pollution source based on the intensity of the representative pollutant molecules from the major pollution source and the dissolved organic carbon concentration; based on the fitting curve, calculating the dissolved organic carbon concentration contributed by the major pollution source in the water body, and based on the dissolved organic carbon concentration contributed by the major pollution source, calculating the contribution rate of the major pollution source to the dissolved organic matter in the water body, so as to quantitatively trace the pollution source of the water body according to the contribution rate of dissolved organic matter.

[0007] Optionally, in one embodiment of this application, the molecular composition and molecular strength of the dissolved organic matter in the sample are expressed by the following formulas:

[0008]

[0009]

[0010] ...

[0011] in, The measured number of samples in the target section A is... The molecular formula of each molecule. express The corresponding molecular strength, The union operator represents the result obtained from the non-targeted ultra-high resolution mass spectrometry detection. The main source of pollution, ... These are the non-primary sources of pollution.

[0012] Optionally, in an embodiment of the present application, before generating the fitting curve of the representative pollution molecule of the main pollution source according to the intensity of the representative pollution molecule of the main pollution source and the concentration of the dissolved organic carbon, it further comprises: performing set relationship operation on the DOM molecular information of the sample based on molecular formula types to obtain an operation result; obtaining the representative pollution molecule of the main pollution source belonging to the target water section, the main pollution source and not belonging to the non-main pollution source according to the operation result; and generating the set of representative pollution molecules of the main pollution source according to the representative pollution molecule of the main pollution source.

[0013] Optionally, in an embodiment of the present application, the set of representative pollution molecules of the main pollution source is:

[0014] wherein, is a set of molecules belonging to , but not belonging to … is a set intersection operator, is a set difference operator.

[0015] Optionally, in an embodiment of the present application, the generating of the fitting curve of the representative pollution molecule of the main pollution source according to the intensity of the representative pollution molecule of the main pollution source and the concentration of the dissolved organic carbon comprises: diluting the sample of the main pollution source according to a gradient to obtain samples diluted at different proportions; testing the molecular composition and molecular intensity of the samples diluted at different proportions to extract intensity information of each representative molecule at different dilution proportions; and generating the fitting curve based on the intensity information and the concentration of the dissolved organic carbon.

[0016] Optionally, in an embodiment of the present application, the calculating of the contribution rate of the main pollution source to the dissolved organic matter of the water body comprises: calculating the contribution rate of the pollution source to the dissolved organic carbon under each representative pollution molecule based on the fitting curve; eliminating outliers in the concentration of the representative pollution molecule to obtain the concentration of the final representative pollution molecule based on the contribution rate; and taking the average of the concentration of the final representative pollution molecule to generate the contribution rate of the main pollution source to the dissolved organic matter of the water body.

[0017] ​A second aspect of this application provides a device for quantitatively tracing water pollution sources, comprising: a detection module for detecting the dissolved organic carbon concentration of samples from a target water body section, a major pollution source, and non-major pollution sources, and for detecting the molecular composition and molecular intensity of dissolved organic matter in the samples using non-targeted ultra-high resolution mass spectrometry; a screening module for screening representative pollutant molecules belonging to the target water body section, the major pollution source, and not belonging to the non-major pollution sources based on the molecular composition and molecular intensity of dissolved organic matter in the samples; a generation module for generating a fitting curve of the representative pollutant molecules of the major pollution sources based on the set of representative pollutant molecules of the major pollution sources and the dissolved organic carbon concentration; and a tracing module for calculating the dissolved organic carbon concentration contributed by the major pollution sources in the water body based on the fitting curve, and calculating the contribution rate of the major pollution sources to the dissolved organic matter in the water body based on the dissolved organic carbon concentration contributed by the major pollution sources, so as to quantitatively trace the pollution sources of the water body according to the contribution rate of dissolved organic matter.

[0018] Optionally, in one embodiment of this application, the molecular composition and molecular strength of the dissolved organic matter in the sample are expressed by the following formulas:

[0019]

[0020]

[0021] ...

[0022] in, The measured number of samples in the target section A is... The molecular formula of each molecule. express The corresponding molecular strength, The union operator represents the result obtained from the non-targeted ultra-high resolution mass spectrometry detection. The main source of pollution, ... These are the non-primary sources of pollution.

[0023] Optionally, in an embodiment of the present application, the method further comprises: performing set relationship operation on DOM molecular information of the sample based on molecular formula types before generating the fitting curve of the representative pollution molecule of the main pollution source based on the set of representative pollution molecules generated based on the main pollution source and the concentration of the dissolved organic carbon; and obtaining the representative pollution molecule of the main pollution source belonging to the target water body section and the main pollution source and not belonging to the non-main pollution source based on the operation result; and generating the set of representative pollution molecules of the main pollution source based on the representative pollution molecule of the main pollution source.

[0024] Optionally, in an embodiment of the present application, the set of representative pollution molecules of the main pollution source is:

[0025] wherein, is a set of molecules belonging to , but not belonging to … is a set intersection operator, is a set difference operator.

[0026] Optionally, in an embodiment of the present application, the generating module comprises: a dilution unit configured to dilute the sample of the main pollution source according to a gradient to obtain samples diluted at different ratios; an extraction unit configured to test molecular composition and molecular intensity of the samples diluted at different ratios to extract intensity information of each representative molecule at different dilution ratios; and a curve generating unit configured to generate the fitting curve based on the intensity information and the concentration of the dissolved organic carbon.

[0027] Optionally, in an embodiment of the present application, the tracing module comprises: a contribution rate calculation unit configured to calculate a contribution rate of a pollution source to the dissolved organic carbon under each representative pollution molecule based on the fitting curve; a rejection unit configured to reject outliers in the concentration of the representative pollution molecule to obtain a final concentration of the representative pollution molecule based on the contribution rate; and a contribution rate generating unit configured to take an average of the final concentration of the representative pollution molecule to generate a contribution rate of the main pollution source to the dissolved organic matter of the water body.

[0028] The third aspect of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a water pollution source quantitative tracing method as described in the above embodiments.​

[0029] The fourth aspect of the present application provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to realize the water pollution source quantitative tracing method.

[0030] The fifth aspect of the present application provides a computer program product, which stores a computer program, and the program is executed by a processor to realize the water pollution source quantitative tracing method.

[0031] The embodiments of the present application take DOM as the starting point, detect and obtain the DOM molecular composition and molecular intensity characteristics of the pollution source through a non-targeting ultra-high resolution mass spectrometer (including but not limited to a Fourier transform ion cyclotron resonance mass spectrometer, a quadrupole time-of-flight mass spectrometer, etc.), calculate the contribution of the pollution source to the water pollution by screening representative pollution molecules, and realize pollution quantitative tracing. Thus, the problems that the related art cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameters of the water body, cannot realize quantitative tracing, is complex in the actual application process, is low in efficiency, and cannot realize quantitative pollution contribution are solved.

[0032] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which: Figure 1 A flow chart of a water pollution source quantitative tracing method according to an embodiment of the present application; Figure 2 A flow chart of a water pollution source quantitative tracing method according to an embodiment of the present application; Figure 3 A structural schematic diagram of a water pollution source quantitative tracing device according to an embodiment of the present application; Figure 4 A structural schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0035] A water pollution source quantitative tracing method and device are described below with reference to the accompanying drawings. In view of the fact that the related technologies mentioned in the background art cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameters of the water body, it is difficult to achieve quantitative tracing, the test method is complex in actual application process, the efficiency is low, and it is difficult to achieve quantitative pollution contribution, the present application provides a water pollution source quantitative tracing method. In the method, DOM is used as a starting point, the DOM molecular composition and molecular intensity characteristics of the pollution source are detected and obtained by a non-targeting ultra-high resolution mass spectrometer (including but not limited to a Fourier transform ion cyclotron resonance mass spectrometer, a quadrupole time-of-flight mass spectrometer, etc.), representative pollution molecules are screened, the contribution of the pollution source to the water pollution is calculated, and quantitative pollution tracing is achieved. Thus, the related technologies cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameters of the water body, it is difficult to achieve quantitative tracing, the test method is complex in actual application process, the efficiency is low, and it is difficult to achieve quantitative pollution contribution.

[0036] Specifically, Figure 1 A flowchart of a water pollution source quantitative tracing method provided by the present application is shown.

[0037] As Figure 1 shown, the water pollution source quantitative tracing method includes the following steps: In step S101, the dissolved organic carbon concentration of the samples of the target water body section, the main pollution source and the non-main pollution source is detected, and the molecular composition and molecular intensity of the dissolved organic matter in the sample are detected by a non-targeting ultra-high resolution mass spectrometer.

[0038] It can be understood that the target water body section in the present application can be a contaminated water body section.

[0039] In actual execution process, the present application adopts water pollution qualitative tracing technology, including but not limited to water quality fluorescence fingerprint method, mass spectrum fingerprint method, stable isotope method and the like, to qualitatively judge the main pollution source of the target water body. The samples of the contaminated water body section and the suspected pollution source are collected, the DOM content of the contaminated water body section and the suspected pollution source sample is detected, which is reflected by the dissolved organic carbon (Dissolved Organic Carbon, DOC) concentration, and the DOM molecular composition and molecular intensity of the sample are detected based on the non-targeting ultra-high resolution mass spectrometer.

[0040] Specifically, for the target section A of a certain water body, the present application adopts water pollution qualitative tracing technology to obtain the main pollution source and the non-main pollution source … , respectively collects A, and … The samples are detected for DOC, and the results are recorded as , .

[0041] In an embodiment of the present application, the expression formulae of the molecular composition and molecular intensity of the dissolved organic matter in the samples are as follows:

[0042]

[0043]

[0044] …

[0045] wherein, represents the molecular formula of the mth molecule detected in the sample of the target section A, represents the molecular intensity corresponding to the mth molecule, is a set union operator, i.e., the result detected by the non-target ultra-high resolution mass spectrometry is a molecular information set composed of data pairs of molecular formulae and corresponding molecular intensities, is a main pollution source, … is a non-main pollution source. Optionally, in an embodiment of the present application, before generating the fitting curve of the main pollution source representative pollution molecule according to the main pollution source representative pollution molecule intensity and the dissolved organic carbon concentration based on the main pollution source representative pollution molecule set, the method further comprises: performing set relationship operation on the DOM molecular information of the sample based on the molecular formula type to obtain an operation result; obtaining the main pollution source representative pollution molecule belonging to the target water body section, the main pollution source and not belonging to the non-main pollution source according to the operation result; and generating the main pollution source representative pollution molecule set according to the main pollution source representative pollution molecule.

[0046] In the present application, the DOM molecular information of each sample is subjected to set relationship operation based on the molecular formula type to obtain the main pollution source representative pollution molecule belonging to ,

[0047] and … … but not belonging to , , and is recorded as a set .

[0048] ​​​Wherein, in an embodiment of the present application, the set of representative pollution molecules of the main pollution source is:

[0049] Wherein, belonging to , but not belonging to … The set of molecules, is the set intersection operator, is the set union operator, is the set difference operator.

[0050] In step S102, based on the molecular composition and molecular intensity of dissolved organic matter in the sample, the main pollution source representative pollution molecules belonging to the target water section, the main pollution source and not belonging to the non-main pollution source are screened out.

[0051] Specifically, the embodiment of the present application can screen the DOM molecules belonging to the polluted water body and the main pollution source, but not belonging to other pollution sources, denoted as the main pollution source representative pollution molecules, which provide support for subsequent set generation.

[0052] In step S103, based on the set of main pollution source representative pollution molecules, the fitting curve of the main pollution source representative pollution molecules is generated according to the intensity of the main pollution source representative pollution molecules and the dissolved organic carbon concentration.

[0053] It can be understood that the embodiment of the present application can establish the quantitative response relationship between the intensity of the representative pollution molecules and the DOC concentration of the main pollution source.

[0054] In actual execution process, the embodiment of the present application can generate the fitting curve of the main pollution source representative pollution molecules according to the intensity of the main pollution source representative pollution molecules and the dissolved organic carbon concentration based on the set generated by the main pollution source representative pollution molecules.

[0055] Optionally, in an embodiment of the present application, generating the fitting curve of the main pollution source representative pollution molecules according to the intensity of the main pollution source representative pollution molecules and the dissolved organic carbon concentration comprises: diluting the sample of the main pollution source according to the gradient to obtain the sample after different dilution ratios; testing the molecular composition and molecular intensity of the sample after different dilution ratios to extract the intensity information of each representative molecule under different dilution ratios; generating the fitting curve based on the intensity information and the dissolved organic carbon concentration.

[0056] In actual execution process, the embodiment of the present application can screen The sample is diluted according to a gradient to obtain samples diluted at different ratios, and the molecular composition and molecular intensity of the samples diluted at different ratios are tested based on The intensity information of each molecule at different dilution ratios is extracted, combined with , and a correlation curve of the molecular intensity of each molecule in with respect to the concentration of dissolved organic matter in is established.

[0057] In step S104, the dissolved organic carbon concentration contributed by the main pollution source in the water body is calculated based on the fitted curve, and the dissolved organic matter contribution rate of the main pollution source to the water body is calculated based on the dissolved organic carbon concentration contributed by the main pollution source, so as to quantitatively trace the pollution source of the water body according to the dissolved organic matter contribution rate.

[0058] In actual implementation, the present embodiment can calculate the DOC concentration contributed by the main pollution source in the water body based on the intensity of the representative pollution molecule in the cross-section sample of the water body and the above quantitative response relationship, and calculate the DOM contribution rate of the main pollution source to the water body.

[0059] The present embodiment takes DOM as the starting point, detects and obtains the DOM molecular composition and molecular intensity characteristics of the pollution source through a non-targeting ultra-high resolution mass spectrometer (including but not limited to a Fourier transform ion cyclotron resonance mass spectrometer and a quadrupole time-of-flight mass spectrometer), calculates the contribution of the pollution source to the water body pollution by screening the representative pollution molecule, and realizes pollution quantitative tracing.

[0060] Optionally, in one embodiment of the present application, calculating the dissolved organic matter contribution rate of the main pollution source to the water body includes: calculating the contribution rate of the pollution source to the dissolved organic carbon for each representative pollution molecule based on the fitted curve; removing outliers in the concentration of each representative pollution molecule based on the contribution rate to obtain the final concentration of the representative pollution molecule; and taking the average of the final concentration of the representative pollution molecule to generate the dissolved organic matter contribution rate of the main pollution source to the water body.

[0061] Wherein, the present embodiment can calculate the DOC concentration contributed by each molecule in the set according to the above correlation curve, and take the average of the calculated concentrations of each molecule after removing outliers, that is, contribute to the DOM of . The present embodiment can calculate the contribution of the pollution source to the water body pollution, and realize pollution quantitative tracing.

[0062] The present embodiment can calculate the contribution of the pollution source to the water body pollution, and realize pollution quantitative tracing.

[0063] Specifically, the present embodiment can be combined with Figure 2 ​The working principle of the water pollution source quantitative tracing method in the embodiments of the present application is described in detail with one specific embodiment.

[0064] As shown in Figure 2 The embodiments of the present application can include the following steps: Step S201: sample collection and pretreatment: water section + suspected pollution source.

[0065] Step S202: sample DOC detection, sample DOM molecular intensity detection.

[0066] Step S203: pollution source representative pollution molecules: belonging to both the target water section sample and the suspected pollution source.

[0067] Step S204: fitting with pollution source representative pollution molecule intensity and DOC concentration.

[0068] Step S205: calculate the corresponding DOC concentration according to the fitting curve of each representative pollution molecule.

[0069] Step S206: calculate the contribution rate of the pollution source to the water body DOC under each representative pollution molecule, and eliminate outliers.

[0070] Step S207: obtain the DOC contribution rate of the suspected pollution source to the water body.

[0071] According to the water pollution source quantitative tracing method proposed in the embodiments of the present application, the DOM is taken as the starting point, the DOM molecular composition and molecular intensity characteristics of the pollution source are detected and obtained through a non-targeting ultra-high resolution mass spectrometer (including but not limited to a Fourier transform ion cyclotron resonance mass spectrometer, a quadrupole time-of-flight mass spectrometer, etc.), the representative pollution molecules are screened, the contribution of the pollution source to the water pollution is calculated, and the pollution quantitative tracing is realized. Therefore, the problem that the related art cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameters of the water body, cannot realize quantitative tracing, and is difficult to realize quantitative pollution contribution in the actual application process is solved.

[0072] Secondly, the water pollution source quantitative tracing device according to the embodiments of the present application is described with reference to the accompanying drawings.

[0073] Figure 3 is a structural schematic diagram of the water pollution source quantitative tracing device in the embodiments of the present application.

[0074] As shown in Figure 3 The water pollution source quantitative tracing device 10 includes a detection module 100, a screening module 200, a generation module 300, and a tracing module 400.

[0075] Specifically, the detection module 100 is configured to detect the dissolved organic carbon concentration of the samples of the target water section, the main pollution source and the non-main pollution source, and detect the molecular composition and molecular intensity of the dissolved organic matter in the samples by using the non-target ultra-high resolution mass spectrometry.

[0076] The screening module 200 is configured to screen out the main pollution source representative pollution molecules belonging to the target water section, the main pollution source and not belonging to the non-main pollution source based on the molecular composition and molecular intensity of the dissolved organic matter in the samples.

[0077] The generation module 300 is configured to generate a fitting curve of the main pollution source representative pollution molecules according to the main pollution source representative pollution molecule intensity and the dissolved organic carbon concentration based on the set of main pollution source representative pollution molecules.

[0078] The tracing module 400 is configured to calculate the dissolved organic carbon concentration of the main pollution source contribution in the water body based on the fitting curve, and calculate the main pollution source contribution rate of the dissolved organic matter of the water body based on the dissolved organic carbon concentration of the main pollution source contribution, so as to quantitatively trace the pollution source of the water body according to the dissolved organic matter contribution rate.

[0079] Optionally, in an embodiment of the present application, the expression formula of the molecular composition and molecular intensity of the dissolved organic matter in the sample is respectively:

[0080]

[0081]

[0082] …

[0083] Wherein, represents the molecular formula of the measured molecule, the molecular intensity corresponding to the molecule, is a set union operator, that is, the measured result of the non-target ultra-high resolution mass spectrometry, is the main pollution source, … is the non-main pollution source.

[0084] Optionally, in an embodiment of the present application, the water pollution source quantitative tracing device 10 further comprises an operation module, an acquisition module and a set generation module.

[0085] ​The operation module is configured to, before generating the fitting curve of the representative pollution molecule of the main pollution source based on the intensity of the representative pollution molecule of the main pollution source and the concentration of the dissolved organic carbon, perform set relationship operation on DOM molecular information of the sample based on molecular formula types to obtain an operation result.

[0086] The acquisition module is configured to acquire the representative pollution molecule of the main pollution source belonging to the target water body section and the main pollution source and not belonging to the non-main pollution source according to the operation result.

[0087] The set generation module is configured to generate a set of representative pollution molecules of the main pollution source according to the representative pollution molecule of the main pollution source.

[0088] Optionally, in an embodiment of the present application, the set of representative pollution molecules of the main pollution source is:

[0089] wherein, is a set of molecules belonging to , but not belonging to … is a set intersection operator, is a set difference operator.

[0090] Optionally, in an embodiment of the present application, the generation module 300 comprises: a dilution unit configured to dilute the sample of the main pollution source according to a gradient to obtain samples diluted at different proportions; an extraction unit configured to test molecular composition and molecular intensity of the samples diluted at different proportions to extract intensity information of each representative molecule at different dilution proportions; and a curve generation unit configured to generate a fitting curve based on the intensity information and the concentration of the dissolved organic carbon.

[0091] Optionally, in an embodiment of the present application, the tracing module 400 comprises: a contribution rate calculation unit, a rejection unit, and a contribution rate generation unit.

[0092] The contribution rate calculation unit is configured to calculate a contribution rate of the pollution source to the dissolved organic carbon under each representative pollution molecule based on the fitting curve.

[0093] The rejection unit is configured to reject outliers in the concentration of each representative pollution molecule based on the contribution rate to obtain a concentration of a final representative pollution molecule.

[0094] The contribution rate generation unit is configured to take a mean value of the concentration of the final representative pollution molecule to generate a contribution rate of the main pollution source to the dissolved organic matter of the water body.

[0095] ​It should be noted that the foregoing explanation of the water pollution source quantitative tracing method embodiment is also applicable to the water pollution source quantitative tracing device of this embodiment, which will not be described here again.

[0096] The water pollution source quantitative tracing device provided by the embodiment of the application takes DOM as a starting point, detects and obtains the DOM molecular composition and molecular intensity characteristics of the pollution source through a non-targeting ultra-high resolution mass spectrometer (including but not limited to a Fourier transform ion cyclotron resonance mass spectrometer and a quadrupole time-of-flight mass spectrometer), calculates the contribution of the pollution source to water pollution by screening representative pollution molecules, and realizes pollution quantitative tracing. Thus, the problem that related technologies cannot identify the contribution of the pollution source to the concentration of the conventional water quality parameters of the water body, cannot realize quantitative tracing, and are difficult to realize quantitative pollution contribution in actual application processes, and are complex in testing method and low in efficiency is solved.

[0097] Figure 4 The structure schematic diagram of the electronic device provided by the embodiment of the application is shown. The electronic device can include: The memory 401, the processor 402 and the computer program stored in the memory 401 and executable on the processor 402.

[0098] The processor 402 implements the water pollution source quantitative tracing method provided in the above embodiment when executing the program.

[0099] Further, the electronic device further includes: The communication interface 403 is used for communication between the memory 401 and the processor 402.

[0100] The memory 401 is used for storing the computer program executable on the processor 402.

[0101] The memory 401 can include a high-speed RAM memory, and can also include a non-volatile memory, for example, at least one disk memory.

[0102] If the memory 401, the processor 402 and the communication interface 403 are independently implemented, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and complete communication between each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation,Figure 4 Only one bus or only one type of bus might exist however.

[0103] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can complete the communication among each other through an internal interface.

[0104] The processor 402 can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the application.

[0105] The embodiment further provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the water pollution source quantitative tracing method.

[0106] The embodiment further provides a computer program product, which stores a computer program, and the program is executed by a processor to implement the water pollution source quantitative tracing method.

[0107] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or N embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0108] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0109] Any processes or methods described in the flowcharts or elsewhere herein can be understood as representing a module, segment, or portion of code that includes one or N steps for implementing the specified logical functions or processes. The scope of a preferred embodiment of the present application encompasses combinations of one or more steps of the described processes, even if not explicitly described herein, and includes additional processes that can be performed in conjunction with the described processes, either before, after, or in between the steps of the described processes. The scope of a preferred embodiment of the present application encompasses additional implementations that can not be explicitly described herein, including implementations that can be more efficient, less efficient, or that can be implemented in a different order, or in a different manner, than the order or manner described herein, as should be understood by those skilled in the art.

[0110] The logic and / or steps represented in the flowcharts or elsewhere herein, for example, can be considered as a list of executable instructions for implementing the logic function, and can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor- containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a product of the manufacturing and / or processing, and can be a machine-readable storage medium (alternatively, "computer-readable storage medium"). The computer-readable medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber (optical), and a portable compact disc read-only memory (CDROM). Note that the computer-readable medium can even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

[0111] It should be understood that aspects of the present application can be implemented in hardware, software, firmware, or combinations thereof. In the above embodiments, the N steps or processes can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As in another embodiment, if implemented in hardware, the hardware can be implemented using any or a combination of the following technologies, which are well known in the art: a discrete logic circuit having logic gates for implementing logic functions upon data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0112] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment method can be completed by programs instructing related hardware, and the programs can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0113] In addition, each functional unit in each embodiment of the present application can be integrated into one processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The integrated module can be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0114] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A method for quantitatively tracing water pollution sources, characterized in that, Includes the following steps: The concentration of dissolved organic carbon in samples from target water sections, major pollution sources, and non-major pollution sources was detected, and the molecular composition and molecular strength of dissolved organic matter in the samples were detected using non-targeted ultra-high resolution mass spectrometry. Based on the molecular composition and molecular strength of dissolved organic matter in the sample, representative pollutant molecules belonging to the target water body section, the main pollution source, and not the non-main pollution source are screened out. Based on the set of representative pollutant molecules from the main pollution sources, a fitting curve of the representative pollutant molecules from the main pollution sources is generated according to the intensity of the representative pollutant molecules from the main pollution sources and the concentration of dissolved organic carbon. Based on the fitted curve, the concentration of dissolved organic carbon contributed by the main pollution source in the water body is calculated, and based on the concentration of dissolved organic carbon contributed by the main pollution source, the contribution rate of the main pollution source to the dissolved organic matter in the water body is calculated, so as to quantitatively trace the pollution source of the water body according to the contribution rate of dissolved organic matter.

2. The method according to claim 1, characterized in that, The formulas expressing the molecular composition and molecular strength of the dissolved organic matter in the sample are as follows: …… in, The measured number of samples in the target section A is... The molecular formula of each molecule. express The corresponding molecular strength, The union operator represents the result obtained from the non-targeted ultra-high resolution mass spectrometry detection. The main source of pollution, ... These are the non-primary sources of pollution.

3. The method according to claim 1, characterized in that, Before generating a fitting curve for the representative pollutants from the main pollution sources based on the set of representative pollutant molecules from the main pollution sources and the concentration of dissolved organic carbon, the process further includes: Based on the molecular formula type, set relationship operations are performed on the DOM molecular information of the sample to obtain the operation results; Based on the calculation results, obtain representative pollutant molecules of the main pollution source that belong to the target water body section, the main pollution source, and not to the non-main pollution source; A set of representative pollutants from the main pollution sources is generated based on the representative pollutants from the main pollution sources.

4. The method according to claim 3, characterized in that, The representative set of pollutants from the main pollution sources is as follows: in, Belongs to , But not belonging to ... A collection of molecules, The intersection operator is used for sets. This is the set difference operator.

5. The method according to claim 1, characterized in that, The process of generating a fitting curve for representative pollutant molecules from the main pollution sources based on the intensity of representative pollutant molecules from the main pollution sources and the concentration of dissolved organic carbon includes: The samples from the main pollution sources were diluted in a gradient to obtain samples diluted at different ratios. The molecular composition and molecular strength of the samples diluted at different ratios were tested in order to extract the strength information of each representative molecule at different dilution ratios. The fitting curve is generated based on the intensity information and the dissolved organic carbon concentration.

6. The method according to claim 5, characterized in that, The calculation of the contribution rate of the main pollution source to the dissolved organic matter in the water body includes: Based on the fitted curve, the contribution rate of the pollution source to the dissolved organic carbon under each representative pollution molecule is calculated; Based on the contribution rate, outliers in the concentrations of each representative pollutant molecule are removed to obtain the final concentration of the representative pollutant molecule. The average concentration of the final representative pollutant molecules is used to generate the contribution rate of the main pollution source to the dissolved organic matter in the water body.

7. A quantitative source tracing device for water pollution sources, characterized in that, include: The detection module is used to detect the concentration of dissolved organic carbon in samples from target water sections, major pollution sources, and non-major pollution sources, and to detect the molecular composition and molecular strength of dissolved organic matter in the samples using non-targeted ultra-high resolution mass spectrometry. The screening module is used to screen out representative pollutant molecules that belong to the target water body section, the main pollution source, and not to the non-main pollution source, based on the molecular composition and molecular strength of the dissolved organic matter in the sample. The generation module is used to generate a fitting curve of the representative pollutant molecules of the main pollution sources based on the set of representative pollutant molecules of the main pollution sources and the concentration of dissolved organic carbon. The source tracing module is used to calculate the concentration of dissolved organic carbon contributed by the main pollution source in the water body based on the fitted curve, and to calculate the contribution rate of the main pollution source to the dissolved organic matter in the water body based on the concentration of dissolved organic carbon contributed by the main pollution source, so as to quantitatively trace the source of pollution in the water body according to the contribution rate of dissolved organic matter.

8. An electronic device, characterized in that, include: The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for quantitative tracing of water pollution sources as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement a quantitative source tracing method for water pollution as described in any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, The computer program is executed to implement a method for quantitative tracing of water pollution sources as described in any one of claims 1-6.

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