AHP-based comprehensive evaluation method for remediation efficiency of coal chemical polluted land parcels

Abstract

The invention relates to the technical field of comprehensive evaluation methods for the remediation efficiency of coal chemical polluted land parcels, in particular to an AHP-based comprehensive evaluation method for the remediation efficiency of coal chemical polluted land parcels. According to the technical scheme, the AHP-based comprehensive evaluation method for the remediation efficiency of the polluted land parcels in the coal chemical industry comprises an analytic hierarchy process weight calculation method; compared with a traditional comprehensive evaluation method for the remediation efficiency of the polluted land parcel in the coal chemical industry, the comprehensive evaluation method for the remediation efficiency of the polluted land parcel in the coal chemical industry generally depends on expert experience or subjective judgment and lacks objective and scientific data support, so that the accuracy and reliability of an evaluation result are affected. The method reduces the influence of subjective judgment, improves the accuracy and reliability of the evaluation result, and ensures the sufficiency and accuracy of the evaluation data through the specific steps of determining the test period and the number of samples, determining the sampling point and the sampling frequency, collecting, storing and transporting the samples and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive evaluation methods for the remediation efficiency of coal chemical pollution sites, and particularly to a comprehensive evaluation method for the remediation efficiency of coal chemical pollution sites based on AHP. Background Art

[0002] The comprehensive evaluation method for the remediation efficiency of coal chemical pollution sites is a method used to comprehensively, objectively, and scientifically evaluate and analyze the remediation technologies for coal chemical pollution sites to determine the comprehensive efficiency in aspects such as remediation effects, resource energy consumption, and environmental friendliness.

[0003] Existing comprehensive evaluation methods for the remediation efficiency of coal chemical pollution sites generally rely more on expert experience or subjective judgment, lacking objective and scientific data support, which affects the accuracy and reliability of evaluation results. At the same time, relevant data cannot be fully collected and utilized, resulting in the lack of sufficient data support for evaluation results and making it difficult to accurately reflect the actual effects of remediation technologies.

[0004] Aiming at the problem that existing comprehensive evaluation methods for the remediation efficiency of coal chemical pollution sites generally rely more on expert experience or subjective judgment, lacking objective and scientific data support, which affects the accuracy and reliability of evaluation results, this comprehensive evaluation method for the remediation efficiency of coal chemical pollution sites uses the analytic hierarchy process (AHP), reducing the influence of subjective judgment, improving the accuracy and reliability of evaluation results, and at the same time emphasizing the collection and collation of data. Through steps such as determining a clear test cycle and the number of samples, determining sampling points and sampling frequencies, and collecting, preserving, and transporting samples, the sufficiency and accuracy of evaluation data are ensured. Summary of the Invention

[0005] In order to overcome the problems of existing comprehensive evaluation methods for the remediation efficiency of coal chemical pollution sites, which generally rely more on expert experience or subjective judgment, lacking objective and scientific data support, affecting the accuracy and reliability of evaluation results, and at the same time being unable to fully collect and utilize relevant data, resulting in the lack of sufficient data support for evaluation results and making it difficult to accurately reflect the actual effects of remediation technologies.

[0006] The technical solution of the present invention is: a comprehensive evaluation method for the remediation efficiency of coal chemical pollution sites based on AHP, including: S101: First, formulate an evaluation plan to clarify the evaluation purpose, scope, and content; S102: Collect technical information materials of the remediation technology and collect and collate the materials; S103: Determine the specific content and calculation method of the evaluation index according to the characteristics of the remediation technology for coal chemical pollution sites; S104: Determine the evaluation test cycle and the number of samples. Based on this information, determine the evaluation test cycle and the number of samples to ensure that the test cycle can fully reflect the remediation effect, resource consumption, and environmental friendliness of the remediation technology; S105: Determine the location and number of sampling points according to the remediation technology process flow, technical characteristics, innovation points, and existing data, and determine the sampling frequency to meet the requirements for sampling and testing different pollutants within the evaluation cycle; S106: Conduct tests on soil, wastewater, waste gas, solid samples, and noise in accordance with relevant standards and specifications, and preserve and transport the collected samples; S107: Prioritize the selection of current national or industry standard methods as the remediation efficacy test methods. When there is no current standard method, the testing agency shall develop the test method by itself and conduct the necessary methodological verification; S108: Establish a hierarchical structure, decompose the evaluation indicators from top to bottom into the target layer, criterion layer, and index layer, and select appropriate scales to construct the judgment matrix; S109: Based on the evaluation index system and the weight calculation results, conduct a comprehensive evaluation of the remediation effect, resource consumption, and environmental friendliness of the remediation technology for coal chemical contaminated sites.

[0007] Preferably, when formulating the evaluation plan, the following steps are included: S201: Determine the specific objectives of the remediation efficacy evaluation for coal chemical contaminated sites, including evaluating the actual effect, resource utilization efficiency, and environmental impact of specific remediation technologies; S202: Define the geographical scope, time scope, and specific evaluation indicators involved in the evaluation to ensure the comprehensiveness and pertinence of the evaluation work; S203: Clearly define the specific responsibilities and task divisions of the evaluation agency, testing agency, and evaluation entrusting party to ensure the smooth progress of the evaluation work; S204: Compile the evaluation plan in detail, including technical introduction, experimental facility introduction, evaluation work plan, quality assurance and quality control, budget, and schedule, to provide comprehensive guidance and basis for the evaluation work.

[0008] Preferably, when collecting and organizing the data, the following steps are included: S301: Comprehensively collect relevant data on the remediation technology, including technical briefings, the situation of the plots where the technology is applied, and existing data, to ensure the data basis for the evaluation work; S302: Systematically organize and analyze the collected data, extract key information, and verify the authenticity and reliability of the data; S303: According to the evaluation needs, compile a list of technical data collection, clarify the types, quantities, and sources of the required data, and ensure the integrity and systematicness of the data collection.

[0009] Preferably, when constructing the evaluation index system, the following steps are included: S401: Deeply study the characteristics of the coal chemical pollution site remediation technology, including the remediation principle, scope of application, and treatment effect, to provide a basis for the construction of the evaluation index system; S402: According to the characteristics of the remediation technology, construct an evaluation index system framework covering three dimensions of remediation effect, resource energy consumption, and carbon evaluation, and clarify the specific content and hierarchical structure of each level of evaluation index; S403: Develop specific calculation methods for each level of evaluation index to ensure the accuracy and repeatability of the evaluation results.

[0010] Preferably, when determining the evaluation test cycle and the number of samples, the following steps are included: S501: Comprehensively collect detailed information on the remediation technology principle, pollutant type and physical and chemical properties, pollutant concentration and distribution characteristics, and the hydrogeological conditions of the site to provide a basis for determining the test cycle and the number of samples; S502: According to the evaluation purpose and evaluation index, analyze the specific requirements for the test cycle and the number of samples to ensure that the test cycle can fully reflect the remediation effect, resource energy consumption, and environmental friendliness of the remediation technology; S503: According to the analysis results, combined with relevant standards and specifications, determine the specific test cycle and the number of samples to ensure the scientificity and rationality of the test work.

[0011] Preferably, when determining the sampling points and sampling frequency, the following steps are included: S601: Deeply study the process flow and technical characteristics of the remediation technology, and clarify the setting requirements of the sampling points and the specific requirements of the sampling frequency; S602: According to the analysis results, combined with the actual situation of the site and the evaluation criteria, determine the specific sampling point locations and quantities to ensure the comprehensiveness and representativeness of the sampling work; S603: According to the evaluation cycle and sampling requirements, develop a specific sampling frequency plan, and clarify the sampling time and sampling times for different pollutants and sampling objects to ensure the accuracy and reliability of the sampling data.

[0012] Preferably, when collecting, preserving, and transporting samples, the following steps are included: S701: According to the sampling requirements, prepare the corresponding sampling tools and equipment to ensure the smooth progress of the sampling work; S702: According to relevant standards and specifications, conduct on-site sampling of soil, wastewater, waste gas, solid samples, and noise to ensure the accuracy and representativeness of the sampling data; S703: Properly store and transport the collected samples to avoid contamination and loss during storage and transportation, and ensure the integrity and accuracy of the samples before testing.

[0013] Preferably, when selecting the method for testing the repair effectiveness, the following steps are included: S801: Comprehensively collect the current national or industry standard methods, and understand the applicable scope and specific operation steps of various testing methods; S802: According to the evaluation purpose and evaluation indicators, analyze the specific requirements of the testing method, and select a suitable testing method; S803: Verify the selected testing method to ensure the accuracy and reliability of the testing method. If there is no current standard method, the testing institution shall develop the testing method by itself and conduct the necessary methodological verification.

[0014] Preferably, when calculating the weights of the analytic hierarchy process, the following steps are included: S901: Decompose the evaluation indicators from top to bottom into the target layer, criterion layer and index layer, and construct a hierarchical structure model; S902: Select a suitable scale, the 1-9 scale method, and construct the judgment matrix of each layer according to the actual situation; S903: Use Matlab to solve the eigenvector and eigenvalue of the judgment matrix, and calculate the weights of each evaluation indicator; S904: According to the consistency test formula, calculate the consistency index CR of the judgment matrix to ensure that the consistency of the judgment matrix meets the requirements. When CR > 0.1, the judgment matrix needs to be corrected until the result meets the consistency test requirements; S905: Compile the calculation results of the weights of each evaluation indicator into a table to provide a basis for subsequent comprehensive evaluation.

[0015] Preferably, when conducting the comprehensive evaluation of the repair effectiveness, the following steps are included: S1001: According to the evaluation index system and the weight calculation results, collect the specific data of each evaluation indicator, including the repair effect indicator, resource energy consumption indicator and carbon evaluation indicator; S1002: Adopt methods such as the weighted average method, and calculate the comprehensive evaluation score according to the weights and data of each evaluation indicator; S1003: According to the comprehensive evaluation score and evaluation criteria, judge the effectiveness level of the coal chemical pollution site repair technology, and prepare a repair effectiveness evaluation report, elaborating in detail the evaluation process, results and suggestions.

[0016] Advantages of the present invention: Compared with the comprehensive evaluation method for the remediation efficiency of traditional coal chemical contaminated sites, it generally relies more on expert experience or subjective judgment, lacking objective and scientific data support. This affects the accuracy and reliability of the evaluation results. At the same time, it cannot fully collect and utilize relevant data, resulting in the lack of sufficient data support for the evaluation results and making it difficult to accurately reflect the actual effects of the remediation technology. The comprehensive evaluation method for the remediation efficiency of this coal chemical contaminated site uses the analytic hierarchy process (AHP), reducing the influence of subjective judgment, improving the accuracy and reliability of the evaluation results. At the same time, it emphasizes the collection and collation of data. Through steps such as determining the clear test cycle and sample number, determining the sampling points and sampling frequencies, and collecting, preserving, and transporting samples, the sufficiency and accuracy of the evaluation data are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the framework process of the comprehensive evaluation method for the remediation efficiency of the coal chemical contaminated site based on AHP of the present invention is shown; Figure 2 The schematic diagram of the process for sample collection, preservation, and transportation of the comprehensive evaluation method for the remediation efficiency of the coal chemical contaminated site based on AHP of the present invention is shown; Figure 3 The schematic diagram of the process for calculating the weights by the analytic hierarchy process of the comprehensive evaluation method for the remediation efficiency of the coal chemical contaminated site based on AHP of the present invention is shown. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be further described below with reference to the drawings and embodiments.

[0019] Please refer to Figures 1 - 3 , the present invention provides an embodiment: a comprehensive evaluation method for the remediation efficiency of a coal chemical contaminated site based on AHP, including: S101: First, formulate an evaluation plan to clarify the evaluation purpose, scope, and content; S102: Collect technical information materials of the remediation technology and collect and collate the materials; S103: Determine the specific content and calculation method of the evaluation indicators according to the characteristics of the remediation technology for the coal chemical contaminated site; S104: Determine the evaluation test cycle and sample number. Based on this information, determine the evaluation test cycle and sample number to ensure that the test cycle can fully reflect the remediation effect, resource energy consumption, and environmental friendliness of the remediation technology; S105: Determine the location and quantity of sampling points according to the technological process, technical characteristics, innovation points, and existing data of the remediation technology, and determine the sampling frequency to meet the requirements of sampling and testing different pollutants within the evaluation cycle; S106: Conduct tests on soil, wastewater, waste gas, solid samples and noise in accordance with relevant standards and specifications, and preserve and transport the collected samples; S107: Prioritize the selection of current national or industrial standard methods as the methods for testing the remediation effectiveness. When there is no current standard method, the testing institution shall develop the testing method by itself and conduct the necessary methodological verification; S108: Establish a hierarchical structure, decompose the evaluation indicators from top to bottom into the target layer, criterion layer and index layer, and select appropriate scales to construct the judgment matrix; S109: According to the evaluation indicator system and the weight calculation results, comprehensively evaluate the remediation effect, resource energy consumption and environmental friendliness of the remediation technologies for coal chemical pollution plots.

[0020] Preferably, when formulating the evaluation plan, it includes the following steps: S201: Determine the specific objectives of the remediation effectiveness evaluation for coal chemical pollution plots, including evaluating the actual effect, resource utilization efficiency and environmental impact of specific remediation technologies; S202: Define the geographical scope, time scope and specific evaluation indicators involved in the evaluation to ensure the comprehensiveness and pertinence of the evaluation work; S203: Clarify the specific responsibilities and task divisions of the evaluation institution, testing institution and evaluation entrusting party to ensure the smooth progress of the evaluation work; S204: Compile the evaluation plan in detail, including technology introduction, experimental facility introduction, evaluation work plan, quality assurance and quality control, budget and schedule, to provide comprehensive guidance and basis for the evaluation work.

[0021] Preferably, when collecting and organizing the data, it includes the following steps: S301: Comprehensively collect relevant data on the remediation technology, including technology introduction, situation of the technology application plots and existing data, to ensure the data basis for the evaluation work; S302: Systematically organize and analyze the collected data, extract key information, and verify the authenticity and reliability of the data; S303: According to the evaluation needs, compile a list of collected technical data, clarify the types, quantities and sources of the required data, and ensure the integrity and systematicness of the data collection.

[0022] Preferably, when constructing the evaluation indicator system, it includes the following steps: S401: Deeply study the characteristics of the remediation technology for coal chemical pollution plots, including remediation principles, application scopes and treatment effects, to provide a basis for the construction of the evaluation indicator system; S402: Based on the characteristics of the remediation technology, construct an evaluation index system framework covering three dimensions: remediation effect, resource energy consumption, and carbon assessment, and clarify the specific content and hierarchical structure of each level of evaluation indicators; S403: Develop specific calculation methods for each level of evaluation indicators to ensure the accuracy and repeatability of the evaluation results.

[0023] Preferably, when determining the evaluation test cycle and the number of samples, the following steps are included: S501: Comprehensively collect detailed information on the remediation technology principle, pollutant type and physical and chemical properties, pollutant concentration and distribution characteristics, and the hydrogeological conditions of the plot to provide a basis for determining the test cycle and the number of samples; S502: According to the evaluation purpose and evaluation indicators, analyze the specific requirements for the test cycle and the number of samples to ensure that the test cycle can fully reflect the remediation effect, resource energy consumption, and environmental friendliness of the remediation technology; S503: Based on the analysis results, combined with relevant standards and specifications, determine the specific test cycle and the number of samples to ensure the scientificity and rationality of the test work.

[0024] Preferably, when determining the sampling points and sampling frequency, the following steps are included: S601: Deeply study the process flow and technical characteristics of the remediation technology, and clarify the setting requirements for sampling points and the specific requirements for sampling frequency; S602: According to the analysis results, combined with the actual situation of the plot and the evaluation standards, determine the specific sampling point locations and quantities to ensure the comprehensiveness and representativeness of the sampling work; S603: According to the evaluation cycle and sampling requirements, formulate a specific sampling frequency plan, clarify the sampling time and sampling times for different pollutants and sampling objects, and ensure the accuracy and reliability of the sampling data.

[0025] Preferably, when collecting, preserving, and transporting samples, the following steps are included: S701: According to the sampling requirements, prepare the corresponding sampling tools and equipment to ensure the smooth progress of the sampling work; S702: According to relevant standards and specifications, conduct on-site sampling of soil, wastewater, waste gas, solid samples, and noise to ensure the accuracy and representativeness of the sampling data; S703: Properly preserve and transport the collected samples to avoid contamination and loss of the samples during preservation and transportation, and ensure the integrity and accuracy of the samples before testing.

[0026] Preferably, when selecting the remediation efficiency test method, the following steps are included: S801: Comprehensively collect current national or industry standard methods, and understand the applicable scope and specific operation steps of various testing methods; S802: According to the evaluation purpose and evaluation indicators, analyze the specific requirements of the testing method, and select a suitable testing method; S803: Verify the selected testing method to ensure the accuracy and reliability of the testing method. If there is no current standard method, the testing institution shall develop the testing method by itself and conduct necessary methodological verification.

[0027] Preferably, when calculating the weights of the analytic hierarchy process, the following steps are included: S901: Decompose the evaluation indicators from top to bottom into the target layer, criterion layer and index layer, and construct a hierarchical structure model; S902: Select a suitable scale, the 1-9 scale method, and construct the judgment matrix of each layer according to the actual situation; S903: Use Matlab to solve the eigenvector and eigenvalue of the judgment matrix, and calculate the weights of each evaluation indicator; S904: According to the consistency test formula, calculate the consistency index CR of the judgment matrix to ensure that the consistency of the judgment matrix meets the requirements. When CR > 0.1, the judgment matrix needs to be corrected until the result meets the consistency test requirements; S905: Compile the calculation results of the weights of each evaluation indicator into a table to provide a basis for subsequent comprehensive evaluation.

[0028] Preferably, when conducting the comprehensive evaluation of the repair effectiveness, the following steps are included: S1001: According to the evaluation index system and the weight calculation results, collect the specific data of each evaluation indicator, including repair effect indicators, resource energy consumption indicators and carbon evaluation indicators; S1002: Adopt methods such as the weighted average method, and calculate the comprehensive evaluation score according to the weights and data of each evaluation indicator; S1003: According to the comprehensive evaluation score and evaluation criteria, judge the effectiveness level of the coal chemical pollution site repair technology, and prepare a repair effectiveness evaluation report, elaborating in detail the evaluation process, results and suggestions.

[0029] Example 1 I. Project background Due to long-term production activities, the soil of a coal chemical enterprise has been seriously polluted, and now the soil of this site needs to be repaired. In order to scientifically evaluate the effectiveness of the repair technology, it is decided to adopt the comprehensive evaluation method for the repair effectiveness of coal chemical pollution sites based on AHP.

[0030] II. Implementation steps S1101: Define the evaluation purpose, and evaluate the remediation effect, resource energy consumption, and environmental friendliness of soil remediation technologies; S1102: Evaluate the heavily polluted areas within the plot, including indicators such as heavy metals and organic pollutants in the soil. The evaluation agency is responsible for the overall evaluation work, the testing agency is responsible for specific tests, and the enterprise is responsible for providing relevant materials and assisting in on-site sampling; S1103: Collect relevant materials on soil remediation technologies, including technical principles, application cases, existing data, etc.; S1104: Systematically organize and analyze the materials, extract key information, and verify the authenticity and reliability of the data; S1105: Analyze the characteristics of soil remediation technologies, and construct an evaluation index system covering three dimensions: remediation effect, such as heavy metal removal rate and organic pollutant degradation rate; resource energy consumption, such as energy consumption, water consumption; and carbon evaluation, such as carbon emissions; S1106: Determine the evaluation test period as 6 months according to the characteristics of soil remediation technologies and the evaluation purpose; S1107: Determine the number of sampling points as 50 according to the plot area and pollution degree, and collect 3 parallel samples at each sampling point; S1108: Uniformly arrange sampling points within the plot according to the actual situation of the plot and the evaluation criteria, formulate a sampling frequency plan, collect samples once a month, and collect a total of 6 times; S1109: Prepare sampling tools and equipment, such as soil samplers, sample bags, labels, etc., conduct on-site sampling in accordance with relevant standards and specifications, ensure the representativeness and accuracy of the samples, properly store and transport the collected samples, and avoid contamination and loss; S1110: Collect current national or industry standard methods, such as "Soil Environmental Quality Standards", etc. According to the evaluation purpose and evaluation indicators, select appropriate test methods, such as atomic absorption spectrometry for the determination of heavy metal content and gas chromatography for the determination of organic pollutant content, etc.; S1111: Establish a hierarchical structure model, divide the evaluation indicators into the target layer, criterion layer, and index layer, select the 1-9 scale method, and construct the judgment matrix for each layer according to expert opinions; S1112: Conduct a consistency test to ensure that the consistency of the judgment matrix meets the requirements; S1113: Collect specific data on each evaluation indicator, such as heavy metal removal rate, energy consumption, carbon emissions, etc., calculate the comprehensive evaluation score using the weighted average method, judge the effectiveness level of the soil remediation technology according to the comprehensive evaluation score and the evaluation criteria, and prepare a remediation effectiveness evaluation report.

[0031] III. Implementation Results After 6 months of evaluation tests, the comprehensive evaluation scores and effectiveness levels of the soil remediation technologies were obtained. The evaluation results showed that the remediation technology had good remediation effects, low resource energy consumption, and its carbon emissions were also controlled within a reasonable range, with an effectiveness level of "good".

[0032] Example 2 I. Project Background Due to production activities, the groundwater of a coal chemical enterprise has been polluted, and now the groundwater needs to be remediated. To scientifically evaluate the effectiveness of the remediation technology, a comprehensive evaluation method for the remediation effectiveness of coal chemical polluted sites based on AHP was decided to be adopted.

[0033] II. Implementation Steps S1101: Evaluate the remediation effects, resource energy consumption, and environmental impacts of the groundwater remediation technology, and conduct evaluations on the groundwater pollution areas around the enterprise, including pollutant concentrations in water, water quality indicators, etc.; The evaluation agency is responsible for the overall evaluation work, the testing agency is responsible for water quality testing, and the enterprise is responsible for providing relevant materials and assisting in on-site sampling, and detailedly prepare the evaluation work plan, quality assurance measures, budget, and progress arrangement; S1103: Collect relevant materials on the groundwater remediation technology, including technical principles, application cases, existing data, etc., systematically organize and analyze the materials, extract key information, and verify the authenticity and reliability of the data; S1104: Analyze the characteristics of the groundwater remediation technology, and construct an evaluation index system covering three dimensions: remediation effects (such as pollutant concentration reduction rate, water quality index improvement rate), resource energy consumption (such as energy consumption, reagent consumption), and carbon evaluation (such as carbon emissions, carbon footprint); S1105: According to the characteristics of the groundwater remediation technology and the evaluation purpose, determine the evaluation test period as 12 months. According to the groundwater flow direction and pollution degree, determine the number of sampling wells as 10, and collect samples from each well once a month; S1106: Uniformly arrange sampling wells in the groundwater pollution areas around the enterprise, formulate a sampling frequency plan, collect samples once a month, for a total of 12 times; S1107: Prepare sampling tools and equipment, such as water pumps, sampling bottles, labels, etc., conduct on-site sampling in accordance with relevant standards and specifications, ensure the representativeness and accuracy of the samples, and properly store and transport the collected samples to avoid pollution and loss; S1108: According to the evaluation purpose and evaluation indicators, select appropriate testing methods, such as using liquid chromatography or gas chromatography for pollutant concentration determination, and using conventional water quality analysis methods for water quality index determination, etc.; S1109: Establish a hierarchical structure model, divide the evaluation indicators into an objective layer, a criterion layer, and an indicator layer, select the 1-9 scale method, and construct the judgment matrix for each layer according to expert opinions; S1110: Use software such as Matlab to solve the eigenvector and eigenvalue of the judgment matrix, calculate the weights of each evaluation indicator, and conduct a consistency test to ensure that the consistency of the judgment matrix meets the requirements; S1111: Collect the specific data of each evaluation indicator, such as the reduction rate of pollutant concentration, energy consumption, carbon emissions, etc. According to the comprehensive evaluation score and evaluation criteria, judge the effectiveness level of the groundwater remediation technology, and prepare a remediation effectiveness evaluation report.

[0034] III. Implementation Results After 12 months of evaluation and testing, the comprehensive evaluation score and effectiveness level of the groundwater remediation technology were obtained. The evaluation results show that the remediation technology has significant remediation effects and low resource energy consumption, and the carbon emissions are also controlled within a reasonable range. The effectiveness level is "excellent".

[0035] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A comprehensive evaluation method for the remediation efficiency of coal chemical contaminated sites based on AHP, characterized in that: It includes: S101: First, formulate an evaluation plan to clarify the evaluation purpose, scope, and content; S102: Collect technical information materials of the remediation technology and collect and sort out the materials; S103: According to the characteristics of the coal chemical pollution site remediation technology, determine the specific content and calculation method of the evaluation indicators; S104: Determine the evaluation test cycle and the number of samples. Based on this information, determine the evaluation test cycle and the number of samples to ensure that the test cycle can fully reflect the remediation effect, resource energy consumption, and environmental friendliness of the remediation technology; S105: Determine the location and number of sampling points according to the remediation technology process flow, technical characteristics, innovation points, and existing data, and determine the sampling frequency to meet the requirements of sampling and testing different pollutants during the evaluation cycle; S106: Conduct tests on soil, wastewater, waste gas, solid samples, and noise according to relevant standards and specifications, and preserve and transport the collected samples; S107: Give priority to selecting the current national or industry standard methods as the remediation efficacy test methods. When there is no current standard method, the testing agency develops its own test methods and conducts necessary methodological verification; S108: Establish a hierarchical structure, decompose the evaluation indicators from top to bottom into the target layer, criterion layer, and index layer, and select appropriate scales to construct a judgment matrix; S109: According to the evaluation index system and the weight calculation results, comprehensively evaluate the remediation effect, resource energy consumption, and environmental friendliness of the coal chemical pollution site remediation technology.

2. The comprehensive evaluation method for the remediation efficiency of coal chemical polluted sites based on AHP according to claim 1, characterized in that: When formulating the evaluation plan, it includes the following steps: S201: Determine the specific objectives of the remediation efficacy evaluation of the coal chemical pollution site, including evaluating the actual effect, resource utilization efficiency, and environmental impact of specific remediation technologies; S202: Define the geographical scope, time range, and specific evaluation indicators involved in the evaluation to ensure the comprehensiveness and pertinence of the evaluation work; S203: Clarify the specific responsibilities and task divisions of the evaluation agency, testing agency, and evaluation entrusting party to ensure the smooth progress of the evaluation work; S204: Compile the evaluation plan in detail, including technical introduction, experimental facility introduction, evaluation work plan, quality assurance and quality control, budget, and schedule, to provide comprehensive guidance and basis for the evaluation work.

3. The comprehensive evaluation method for the remediation efficiency of coal chemical polluted sites based on AHP according to claim 1, wherein: When collecting and sorting out the materials, it includes the following steps: S301: Comprehensively collect relevant materials of the remediation technology, including technical brief, technical application site conditions, and existing data, to ensure the data basis of the evaluation work; S302: Systematically organize and analyze the collected materials, extract key information, and verify the authenticity and reliability of the data; S303: According to the evaluation needs, compile a list of technical material collection to clarify the types, quantities, and sources of the required materials to ensure the integrity and systematicness of the material collection.

4. The comprehensive evaluation method for the remediation efficiency of coal chemical pollution sites based on AHP according to claim 1, characterized in that: When constructing the evaluation index system, it includes the following steps: S401: Deeply study the characteristics of the coal chemical pollution site remediation technology, including remediation principles, applicable scopes, and treatment effects, to provide a basis for the construction of the evaluation index system; S402: Construct a framework for the evaluation index system covering three dimensions of repair effect, resource energy consumption, and carbon assessment according to the characteristics of the repair technology, and clarify the specific content and hierarchical structure of each level of evaluation indicators; S403: Develop specific calculation methods for each level of evaluation indicators to ensure the accuracy and repeatability of the evaluation results.

5. The comprehensive evaluation method for the remediation efficiency of coal chemical polluted sites based on AHP according to claim 1, wherein: When determining the evaluation test cycle and the number of samples, the following steps are included: S501: Comprehensively collect detailed information on the repair technology principle, pollutant types and physical and chemical properties, pollutant concentration and distribution characteristics, and the hydrogeological conditions of the plot to provide a basis for determining the test cycle and the number of samples; S502: Analyze the specific requirements for the test cycle and the number of samples according to the evaluation purpose and evaluation indicators to ensure that the test cycle can fully reflect the repair effect, resource energy consumption, and environmental friendliness of the repair technology; S503: Determine the specific test cycle and the number of samples according to the analysis results, combined with relevant standards and specifications, to ensure the scientificity and rationality of the test work.

6. The comprehensive evaluation method for the remediation efficiency of coal chemical polluted sites based on AHP according to claim 1, characterized in that: When determining the sampling points and sampling frequencies, the following steps are included: S601: Deeply study the technological process and technical characteristics of the repair technology to clarify the requirements for setting sampling points and the specific requirements for sampling frequencies; S602: Determine the specific positions and quantities of the sampling points according to the analysis results, combined with the actual situation of the plot and the evaluation criteria, to ensure the comprehensiveness and representativeness of the sampling work; S603: Develop a specific sampling frequency plan according to the evaluation cycle and sampling requirements, clarify the sampling time and sampling times for different pollutants and sampling objects, to ensure the accuracy and reliability of the sampling data.

7. The comprehensive evaluation method for the remediation efficiency of coal chemical contaminated sites based on AHP according to claim 1, characterized in that: When collecting, preserving, and transporting samples, the following steps are included: S701: Prepare the corresponding sampling tools and equipment according to the sampling requirements to ensure the smooth progress of the sampling work; S702: Conduct on-site sampling of soil, wastewater, waste gas, solid samples, and noise according to relevant standards and specifications to ensure the accuracy and representativeness of the sampling data; S703: Properly preserve and transport the collected samples to avoid pollution and loss of the samples during preservation and transportation, and ensure the integrity and accuracy of the samples before testing.

8. The comprehensive evaluation method for the restoration efficiency of coal chemical polluted land based on AHP according to claim 1, wherein: When selecting the repair efficiency test method, the following steps are included: S801: Comprehensively collect current national or industry standard methods, and understand the applicable scope and specific operation steps of various test methods; S802: Analyze the specific requirements for the test method according to the evaluation purpose and evaluation indicators, and select a suitable test method; S803: Verify the selected test method to ensure the accuracy and reliability of the test method. If there is no current standard method, the test institution shall develop the test method by itself and conduct the necessary methodological verification.

9. The comprehensive evaluation method for the remediation efficiency of coal chemical polluted sites based on AHP according to claim 1, wherein: When calculating the weights of the analytic hierarchy process, the following steps are included: S901: Decompose the evaluation indicators from top to bottom into the target layer, criterion layer, and indicator layer, and construct a hierarchical structure model; S902: Select a suitable scale, the 1-9 scale method, and construct the judgment matrix of each layer according to the actual situation; S903: Use Matlab to solve the eigenvector and eigenvalue of the judgment matrix, and calculate the weights of each evaluation indicator; S904: Calculate the consistency index CR of the judgment matrix according to the consistency test formula to ensure that the consistency of the judgment matrix meets the requirements. When CR > 0.1, the judgment matrix needs to be corrected until the result meets the consistency test requirements; S905: Compile the calculation results of the weights of each evaluation index into a table to provide a basis for subsequent comprehensive evaluation.

10. The comprehensive evaluation method for the restoration efficiency of coal chemical polluted land based on AHP according to claim 1, characterized in that: When conducting the comprehensive evaluation of the repair efficiency, the following steps are included: S1001: According to the evaluation index system and the calculation results of the weights, collect the specific data of each evaluation index, including the repair effect index, resource energy consumption index, and carbon evaluation index; S1002: Use methods such as the weighted average method to calculate the comprehensive evaluation score according to the weights and data of each evaluation index; S1003: According to the comprehensive evaluation score and the evaluation criteria, judge the efficiency level of the coal chemical pollution site repair technology, and compile a repair efficiency evaluation report, elaborating in detail the evaluation process, results, and suggestions.

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