CN-121978271-A - Pollution monitoring method and device based on stable isotope, computer equipment and storage medium

CN121978271ACN 121978271 ACN121978271 ACN 121978271ACN-121978271-A

Abstract

The application relates to a pollution monitoring method, a pollution monitoring device, computer equipment and a storage medium based on stable isotopes. The method comprises the steps of obtaining volatile fractionation parameters, dissolution fractionation parameters, adsorption fractionation parameters and sample fractionation data corresponding to target pollutants, constructing an initial evaluation model according to the volatile fractionation parameters, the dissolution fractionation parameters and the adsorption fractionation parameters, training the initial evaluation model according to the sample fractionation data to determine a target evaluation model, obtaining local fractionation data of the target pollutants, evaluating the local fractionation data according to the target evaluation model to determine fractionation data of the target pollutants in a second target phase state of a target environment, and determining mass flux of the target pollutants in the target environment according to the local fractionation data and the fractionation data of the second target phase state, so that high-density non-aqueous phase liquid pollutants are monitored efficiently. The method can be adopted.

Inventors

Hao na
CHEN LU
WANG LINGWEN

Assignees

浙江大学杭州国际科创中心

Dates

Publication Date: 20260505
Application Date: 20251226

Claims (10)

1. A method of stable isotope-based pollution monitoring, the method comprising: The method comprises the steps of obtaining volatile fractionation parameters, dissolution fractionation parameters, adsorption fractionation parameters and sample fractionation data corresponding to target pollutants, wherein the target pollutants are high-density non-aqueous phase liquid pollutants, and the sample fractionation data are the mole numbers and the stable isotope abundance of NAPL phases, aqueous phases, gas phases and adsorption phases of the target pollutants in any environment and under stable conditions; Constructing an initial evaluation model according to the volatile fractionation parameters, the dissolution fractionation parameters and the adsorption fractionation parameters; Training the initial evaluation model according to the sample fractionation data to determine a target evaluation model; obtaining local fractional distillation data of target pollutants, wherein the local fractional distillation data are fractional distillation data of the target pollutants in a first target phase state of a target environment, and the first target phase state is any one of NAPL phase, water phase, gas phase or adsorption phase; Evaluating the local fractional distillation data according to the target evaluation model to determine fractional distillation data of target pollutants in a second target phase state of a target environment, wherein the second target phase state is other phase states except the first target phase state; And determining the mass flux of the target pollutant in the target environment according to the local fractional distillation data and the fractional distillation data of the second target phase state.
2. The stable isotope-based pollution monitoring method of claim 1, wherein the obtaining the volatile fractionation parameter, the dissolution fractionation parameter, the adsorption fractionation parameter, and the sample fractionation data corresponding to the target pollutant includes: obtaining sample fractionation data corresponding to target pollutants; performing a volatilization experiment aiming at target pollutants, and determining volatilization fractionation parameters of stable isotopes of the target pollutants; aiming at target pollutants, carrying out a dissolution experiment to determine dissolution fractionation parameters of stable isotopes of the target pollutants; and (3) carrying out an adsorption experiment aiming at the target pollutant, and determining the adsorption fractionation parameters of the stable isotope of the target pollutant.
3. The stable isotope-based pollution monitoring method of claim 2 wherein the performing a volatilization experiment for the target pollutant, determining the volatilization fractionation parameters of the stable isotope of the target pollutant includes: Based on a preset volatilization environment, carrying out a volatilization experiment, and determining the volatilization isotope ratio and the volatilization proportion of the target pollutant of the NAPL phase after volatilization; determining the abundance of the first volatile isotope according to the ratio of the volatile isotopes and the natural isotope ratio corresponding to the target pollutant; Determining the abundance of a second volatile isotope according to a preset isotope ratio and a natural isotope ratio corresponding to the target pollutant, wherein the preset isotope ratio comprises the isotope ratio of the target pollutant of the NAPL phase before volatilization; and determining a volatilization fractionation factor of the target pollutant according to the abundance of the first volatile isotope, the abundance of the second volatile isotope and the volatilization proportion, and taking the volatilization fractionation factor as a volatilization fractionation parameter.
4. The stable isotope-based pollution monitoring method of claim 2 wherein the performing a dissolution experiment for the target pollutant and determining dissolution fractionation parameters for the stable isotope of the target pollutant comprises: based on a preset dissolution environment, performing a dissolution experiment to determine a first dissolved isotope ratio of the target pollutant of the NAPL phase after dissolution and a second dissolved isotope ratio of the target pollutant of the water phase; Determining the abundance of the first dissolved isotope according to the ratio of the first dissolved isotope and the natural isotope ratio corresponding to the target pollutant; Determining the abundance of the second dissolved isotope according to the ratio of the second dissolved isotope and the natural isotope ratio corresponding to the target pollutant; determining a dissolution fractionation factor of the target pollutant according to the first dissolution isotope abundance and the second dissolution isotope abundance, and taking the dissolution fractionation factor as a dissolution fractionation parameter.
5. The stable isotope-based pollution monitoring method of claim 2 wherein the performing an adsorption experiment on the target pollutant and determining adsorption fractionation parameters of the stable isotope of the target pollutant comprises: Based on a preset adsorption environment, carrying out an adsorption experiment, and determining a first adsorption isotope ratio and an adsorption proportion of target pollutants of the target pollutant solution after adsorption; determining the abundance of the first adsorbed isotope according to the first adsorbed isotope ratio and the natural isotope ratio corresponding to the target pollutant; determining second adsorption isotope abundance according to the first adsorption isotope abundance, the adsorption proportion and preset isotope abundance, wherein the preset isotope abundance comprises isotope abundance of target pollutants of target pollutant solution before adsorption; And determining an adsorption fractionation factor of the target pollutant according to the first adsorption isotope abundance and the second adsorption isotope abundance, and taking the adsorption fractionation factor as an adsorption fractionation parameter.
6. The stable isotope-based pollution monitoring method of claim 1, wherein the training the initial assessment model based on the sample fractionation data, determining a target assessment model comprises: And fitting a first constant, a second constant and a third constant in the initial evaluation model according to the sample fractionation data to determine a target evaluation model, wherein the first constant is a dissolution rate constant corresponding to the target pollutant, the second constant is a volatilization rate constant corresponding to the target pollutant, and the third constant is an adsorption rate constant corresponding to the target pollutant.
7. The stable isotope-based pollution monitoring method of claim 6 wherein the fractionation data for the target pollutant in the second target phase of the target environment includes a molar quantity and an isotope abundance of the target pollutant in the second target phase of the target environment, and determining the mass flux of the target pollutant in the target environment based on the local fractionation data and the fractionation data for the second target phase includes: Based on a first preset flux calculation formula, determining the mass flux of the target pollutant in the dissolution process of the target environment according to the first constant and the mole number of the target pollutant in the NAPL phase of the target environment; and determining the mass flux of the target pollutant in the volatilization process of the target environment according to the second constant and the mole number of the target pollutant in the NAPL phase of the target environment based on a second preset flux calculation formula.
8. A stable isotope-based pollution monitoring device, the device comprising: The device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring volatile fractionation parameters, dissolution fractionation parameters, adsorption fractionation parameters and sample fractionation data corresponding to target pollutants, the target pollutants are high-density non-aqueous phase liquid pollutants, and the sample fractionation data are the mole numbers and the stable isotope abundance of NAPL phases, aqueous phases, gas phases and adsorption phases of the target pollutants in any environment and under stable conditions; The construction module is used for constructing an initial evaluation model according to the volatile fractionation parameters, the dissolution fractionation parameters and the adsorption fractionation parameters; The first determining module is used for training the initial evaluation model according to the sample fractionation data to determine a target evaluation model; The system comprises a first acquisition module, a second acquisition module and a storage module, wherein the first acquisition module is used for acquiring local fractionation data of target pollutants, the local fractionation data are fractionation data of the target pollutants in a first target phase state of a target environment, and the first target phase state is any one of a NAPL phase, a water phase, a gas phase or an adsorption phase; The second determining module is used for evaluating the local fractional distillation data according to the target evaluation model and determining fractional distillation data of a second target phase state of the target pollutant in the target environment, wherein the second target phase state is the rest phase state except the first target phase state; And the third determining module is used for determining the mass flux of the target pollutant in the target environment according to the local fractional data and the fractional data of the second target phase state.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any one of claims 1 to 7.

Description

Pollution monitoring method and device based on stable isotope, computer equipment and storage medium Technical Field The present application relates to the field of pollution monitoring technologies, and in particular, to a pollution monitoring method, apparatus, computer device, and storage medium based on stable isotopes. Background At present, pollution investigation aiming at a field high-density nonaqueous phase liquid DNAPLs mainly adopts traditional invasive drilling sampling and experimental analysis, has the defects of high cost, poor space coverage and the like, and meanwhile, has the problems of lower accuracy and spatial resolution in the in-situ characterization and fine characterization technology of DNAPLs multiple phases due to the influence of the field medium heterogeneity and the complexity of DNAPLs multiple phases and multiple interface migration and transformation processes. There is a need for a solution that can efficiently monitor high density non-aqueous liquid contaminants. Disclosure of Invention In view of the above, it is desirable to provide a stable isotope-based pollution monitoring method, apparatus, computer device, and storage medium that can efficiently monitor high-density nonaqueous phase liquid pollutants. In a first aspect, the present application provides a stable isotope-based pollution monitoring method. The method comprises the steps of obtaining volatile fractionation parameters, dissolution fractionation parameters, adsorption fractionation parameters and sample fractionation data corresponding to target pollutants of the target pollutants, wherein the target pollutants are high-density non-aqueous phase liquid pollutants, the sample fractionation data are NAPL phases, aqueous phases, gas phases and mole numbers of adsorption phases of the target pollutants in any environment and under stable conditions, and stable isotope abundance, constructing an initial evaluation model according to the volatile fractionation parameters, the dissolution fractionation parameters and the adsorption fractionation parameters, training the initial evaluation model according to the sample fractionation data, determining a target evaluation model, obtaining local fractionation data of the target pollutants, wherein the local fractionation data are fractionation data of the target pollutants in a first target phase state of a target environment, the first target phase state is any one of NAPL phases, aqueous phases, gas phases or adsorption phases, evaluating the local fractionation data according to the target evaluation model, determining second target phase states of the target pollutants in the target environment, wherein the second target phase states are data of the target pollutants except the first target phase states, and determining the local fractionation data of the target pollutants in the target phase states according to the first target phase states. In one embodiment, the obtaining the volatilization fractionation parameter, dissolution fractionation parameter, adsorption fractionation parameter and sample fractionation data corresponding to the target pollutant includes obtaining sample fractionation data corresponding to the target pollutant, performing a volatilization experiment for the target pollutant to determine the volatilization fractionation parameter of the stable isotope of the target pollutant, performing a dissolution experiment for the target pollutant to determine the dissolution fractionation parameter of the stable isotope of the target pollutant, and performing an adsorption experiment for the target pollutant to determine the adsorption fractionation parameter of the stable isotope of the target pollutant. In one embodiment, the determining the volatilization fractionation parameters of the stable isotopes of the target pollutants by performing a volatilization experiment on the target pollutants comprises determining the volatilization isotope ratio and the volatilization proportion of the target pollutants of the NAPL phase after volatilization based on a preset volatilization environment, determining the abundance of a first volatilized isotope according to the volatilization isotope ratio and the natural isotope ratio corresponding to the target pollutants, determining the abundance of a second volatilized isotope according to the preset isotope ratio and the natural isotope ratio corresponding to the target pollutants, wherein the preset isotope ratio comprises the isotope ratio of the target pollutants of the NAPL phase before volatilization, determining the volatilization fractionation factors of the target pollutants according to the abundance of the first volatilized isotope, the abundance of the second volatilized isotope and the volatilization proportion, and taking the volatilization fractionation factors as the volatilization fractionation parameters. In one embodiment, the dissolution experiment is performed on the target pollutan