41 results about "Soil contamination" patented technology

The invention relates to the technical field of soil pollution analysis, and discloses a soil heavy metal intelligent evaluation method, system and terminal, and the method comprises a multi-source heterogeneous data fusion and preprocessing step, a dynamic spatial interpolation modeling step and an intelligent visualization and decision support step. The system corresponds to the method, and the terminal equipment corresponds to the system. According to the method, comprehensive data support for soil heavy metal pollution is realized through multi-source heterogeneous data fusion and preprocessing; through dynamic spatial interpolation modeling and a dynamic parameter adjustment mechanism, high-precision grid surface layer generation is realized, and the fitting precision of pollution spatial distribution is improved; intelligent pollution grading and multi-factor dynamic calculation of pollution indexes are realized through self-adaptive grading and pollution index calculation, and the accuracy of an analysis result is improved; through intelligent visualization and decision support, a dynamic and visual decision basis is provided for multi-department collaborative governance and risk early warning.

The invention discloses an early warning grade evaluation method based on an urban pollution industrial site, relates to the technical field of industrial site early warning evaluation, and solves the technical problems of incomplete overall evaluation and lack of systematic analysis process and data processing correction caused by analysis of a single evaluation index. According to the method, pollution factor indexes are integrated in a three-dimensional mode through the pollutant standard exceeding multiple mean value, the specific pollutant toxicity coefficient and the pollution plume diffusion area proportion, the pollution intensity is reflected, toxicity hazards and spatial diffusion risks are considered, the soil pollution area is calculated through the Kriging interpolation method, the groundwater pollution plume area is predicted through the MODFLOW model, and the groundwater pollution plume area is predicted through the MODFLOW model. The overlapping area is processed through a maximum area method, repeated statistics is avoided, the accuracy of pollution range data is improved, different threshold values are set, standardized matching of comprehensive indexes and early warning levels is achieved, corresponding management and control measures are defined for all the early warning levels, abstract comprehensive indexes are converted into specific practical operation guidance, and hierarchical management and control can be conveniently carried out.

The invention belongs to the technical field of regional soil pollution evaluation and risk management, and particularly relates to a pollution grading evaluation and point source pollution identification method based on a regional soil environment background. The method comprises the following steps: determining a target area range and soil target pollutants; obtaining a current-stage soil environment background concentration data set of the target area, and calculating a statistical index of the data set; arranging regional soil pollution monitoring points, and monitoring the target pollutant content of the soil sample; and finally, the constructed pollution index evaluation model based on the soil environment background is adopted to calculate the single or combined pollution index of the soil at each point, the regional soil pollution grade and the environment quality are quantitatively evaluated, and the soil pollution point source is further identified. According to the method provided by the invention, based on the soil environment background content, the uncertainty of overestimation of non-point source pollution in a traditional soil pollution evaluation method is optimized, and the point source pollution point location can be accurately positioned.

The utility model discloses a soil sampler for soil pollution investigation, which comprises a sampling outer cylinder, a sampling inner cylinder mounted in the sampling outer cylinder in a matching manner, a positioning mechanism and a fastening mechanism, the positioning mechanism comprises scales, a positioning ring, fixing plates, fixing bolts, a rotating wheel and a positioning bolt, the scales are arranged on the front side and the rear side of the outer surface of the sampling outer cylinder, the positioning ring is slidably arranged in the middle of the outer surface of the sampling outer cylinder in a sleeving mode, and the fixing plates are arranged on the left side and the right side of the positioning ring; fixing bolts are in threaded connection in threaded holes formed in the front side and the rear side of the fixing plate correspondingly, rotating wheels are fixedly connected to the upper surfaces of the fixing bolts correspondingly, and positioning bolts are in threaded connection in threaded grooves in the front side and the rear side of the outer surface of the positioning ring correspondingly; when the soil sampler for soil pollution investigation is used for sampling hard soil, the soil sampler for soil pollution investigation is firmly fixed, the sampling depth can be fixed, the hard soil sample cannot fall off during sampling, and the influence on the sampling result is avoided.

The invention discloses a plot soil pollution condition survey information acquisition and analysis system, relates to the technical field of plot soil information acquisition and analysis, and aims to solve the problem of unclear soil pollution condition analysis. According to the method, abstract sample detection data is converted into a law conclusion with spatial significance through accurate association, standard processing, visual display and deep analysis, the accuracy and systematicness of spatial analysis are ensured, the practicability of a result is enhanced through visualization, and the accuracy and accuracy of the result are improved by combining the spatial distribution law of sample analysis. A pollution core area is delimited for an aggregation area, key parameters are counted, classified implementation of target area, physical and chemical property and pollutant detection is provided for traceability and key treatment, various sample sensors are accurately matched with detection items, a full-dimension detection system of basic attributes and pollution characteristics is formed, and the detection accuracy is improved. The grid point distribution method or the snakelike point distribution method is combined with the marked GPS coordinates, the sampling depth and the serial number, so that the point location distribution is uniform, and the space positioning traceability of the sample is realized.

The invention discloses wide-proportion ecological nutrient soil based on geopolymer modified iron tailings and a preparation method of the wide-proportion ecological nutrient soil, relates to the technical field of waste resource utilization and ecological restoration, and aims to solve the technical problems of land occupation due to accumulation of the iron tailings, heavy metal pollution, structure hardening and low resource utilization rate. Iron tailings are used as a core raw material and matched with a geopolymer gel system to construct a stable framework and solidify heavy metal, organic nutrient components and a function regulator are compounded to optimize physicochemical properties and nutrient supply, and the ecological nutrient soil is prepared through the processes of raw material pretreatment, synergistic excitation, gradient maintenance and the like. According to the nutrient soil, large-scale flexible absorption (the proportion is 40-80%) of the iron tailings is achieved, meanwhile, the nutrient soil has a pore structure suitable for plant growth, the water and fertilizer retention capacity and the pH value (6.0-7.8) are achieved, the heavy metal leaching amount meets the Soil Environment Quality Agricultural Land Soil Pollution Risk Management and Control Standard, and the method is suitable for large-scale popularization and application. The multi-scene plant growth requirements of farmland improvement, landscaping, mine regreening, side slope ecological protection and the like can be met.

This application proposes a method and system for analyzing and warning heavy metal contamination in soil, which relates to the field of environmental monitoring technology. The method includes: determining the particle uniformity of the soil in the target area and triggering a deep pollution collection instruction based on the particle uniformity; in response to receiving the deep pollution collection instruction, collecting migration trend data of pollutants at different depths in the target area soil and environmental data of the target area; based on the migration trend data and environmental data, as well as a pre-trained target pollution dynamic analysis model, determining the migration prediction results of pollutants at different depths in the target area soil; based on the migration trend data, environmental data, and particle uniformity, determining the soil pollution warning index of the target area, and based on the soil pollution warning index and migration prediction results, issuing a warning to the target area. As a result, this solution can improve the response speed of the warning and achieve accurate analysis of the migration path of pollutants.

This invention discloses a method and system for delineating soil contaminated areas. The method includes: generating a first pollution feature layer by fusing historical pollution data and remote sensing spectral features, and generating a second pollution concentration layer based on an anisotropic pollution diffusion model; analyzing whether pixel spectral features indicate pollution using a trained discriminant model, and marking pixels as core, suspicious, or clean pixels based on concentration exceeding the standard; determining the diffusion correlation between suspicious areas and adjacent core areas by calculating boundary migration feature similarity; merging highly correlated areas according to pollution diffusion fusion rules based on the correlation results to form pollution diffusion areas; and finally optimizing, aggregating, and classifying all contaminated areas based on preset rules to generate a final soil contaminated area delineation map with risk levels. This invention achieves automated and high-precision identification and delineation of soil contaminated areas.

The invention discloses high-absorption-amount ecological nutrient soil based on geopolymer modified lithium tailings and a preparation method of the high-absorption-amount ecological nutrient soil, relates to the technical field of waste resource utilization and ecological restoration, and aims to solve the technical problems that the land is occupied by accumulation of the lithium tailings, the environment is polluted by soluble salt and heavy metal, and the resource utilization rate is extremely low. Lithium tailings are used as a core raw material (70-90%), a geopolymer gel system is matched to construct a stable framework and solidify pollutants, organic nutrient components and a function regulator are compounded to optimize physicochemical properties and nutrient supply, and the ecological nutrient soil is prepared through the processes of raw material pretreatment, synergistic excitation, gradient maintenance and the like. The nutrient soil realizes super-large-scale absorption of the lithium tailings, has a pore structure suitable for plant growth, has water and fertilizer retention capabilities, and has heavy metal and soluble salt leaching amounts in line with Soil Environmental Quality Agricultural Land Soil Pollution Risk Management and Control Standards. The plant growth requirements of scenes such as mine regreening, landscaping, side slope ecological protection and saline-alkali soil improvement can be met.

The invention belongs to the technical field of soil pollution remediation, and discloses an intelligent soil heavy metal pollution remediation device. The sliding block type insulation module is installed above the electrolysis gas production guide and discharge and pore water collection and storage guide and discharge module, the interface positioning module is arranged on the outer side of the sliding block type insulation module in a sleeving mode, and the integrated EXG electrode and the electrolysis gas production guide and discharge and pore water collection and storage guide and discharge module are coaxially arranged. The intelligent soil heavy metal pollution remediation device has the beneficial effects that under the action of the rotating assembly, the integrated EXG electrode rotates, an electric field is changed into a dynamic sweeping field from a fixed static field, the inherent problem that electric field lines in heterogeneous soil are concentrated in a low-resistance path can be solved, and the remediation efficiency is improved. The electric field line can cover a polluted area more uniformly, and'restoration dead angles / blind areas' of a traditional fixed electrode are eliminated.

The invention discloses high-consumption artificial nutrient soil based on geopolymer modified gold tailing mud and a preparation method of the high-consumption artificial nutrient soil, relates to the technical field of waste resource utilization and ecological restoration, and aims to solve the problems that the gold tailing mud occupies land due to accumulation, the environment is polluted by heavy metal, and the resource utilization rate is extremely low. Gold tailing mud is used as a core raw material, a geopolymer gelling system is matched to construct a stable framework and solidify heavy metal, organic nutrient components and a function regulator are compounded to optimize physicochemical properties and nutrient supply, and the artificial nutrient soil is prepared through the processes of raw material pretreatment, synergistic excitation, gradient maintenance and the like. According to the nutrient soil, super-large-scale absorption of gold tailing mud is achieved, meanwhile, the nutrient soil has a pore structure suitable for plant growth and water and fertilizer retention capacity, the heavy metal leaching amount meets the Soil Environment Quality Agricultural Land Soil Pollution Risk Management and Control Standard, and the plant growth requirements of landscaping, mine regreening, side slope ecological protection and other scenes can be met.

The invention relates to the technical field of soil pollution remediation and detection, in particular to farmland soil pollution detection and treatment integrated equipment and a gradient purification method. The farmland soil pollution detection and treatment integrated equipment comprises a detection module, a gradient purification module, an intelligent control module and the like; the detection module comprises a multispectral sensor and the like to realize accurate detection; the gradient purification module is divided into three layers, the surface layer uses nanoscale zero-valent iron-graphene aerogel to remove heavy metals, the middle layer uses beta-cyclodextrin and nano TiO2 to degrade organic matters, and the deep layer uses calcium magnesium aluminum hydrotalcite to fix ions; the in-situ reaction strengthening module strengthens purification through ultrasonic waves, microwaves and the like; and the intelligent control module realizes automation and data management. By means of the integrated equipment and method, precise detection and efficient treatment of soil pollution are achieved; various pollutants can be treated, the use of chemicals is reduced, the cost and pollution risk are reduced, the soil ecology can be restored, the automation degree is high, the application range is wide, and the economic and social benefits are good.

The invention relates to the technical field of soil detection, in particular to a portable rapid soil pollution detection and analysis device. Comprising an outer cylinder, an inner cylinder is movably installed in the outer cylinder, a detector is fixedly installed in the inner cylinder and used for rapidly detecting soil pollution indexes and nutrient content, the outer cylinder comprises a first cylinder body, the first cylinder body is of a cylindrical hollow structure, and the inner diameter of the first cylinder body is larger than the outer diameter of the inner cylinder so that the inner cylinder can flexibly move; the soil breaking head is of a conical structure and can be conveniently inserted into soil under the pressure effect, the soil is pushed aside to the periphery, and the soil entering resistance of the first cylinder is reduced, pressing plates are installed on the two sides of the first cylinder through rotating shafts, soil of different soil layers is scraped through a soil scraping plate of an outer cylinder, and then residual soil of a detection rod is cleaned through the rotating action of a cleaning brush and an inner cylinder. Therefore, the problems of residual soil, low detection precision and cross contamination of the detection rod are solved.

The invention belongs to the technical field of ecological environment, and relates to a method for determining specific pollutants in construction land soil pollution condition investigation. The method comprises the following steps: S1) determining specific pollutants according to the industrial land history of an investigated land; (2) determining specific pollutants according to pollution accidents in the industrial land history of the investigated plot; (3) investigating pollution traces according to the distribution condition of the industrial production devices on the investigated land parcel, and determining specific pollutants; s2, drawing a groundwater equal-water-level map of the investigated plot; s3, combining the groundwater equal-water-level graph of the investigated land parcel, combing enterprises existing in history and existing around the boundary of the investigated land parcel, and determining related characteristic pollutants; and S4, combining the same specific pollutants in the steps S1 to S3 to obtain the sum of the specific pollutants of the investigated plot.

This utility model discloses a seepage-proof and leachate collection device for the treatment of aged waste, relating to the field of aged waste treatment technology. The utility model includes a ground body with pits formed in it, and further includes: a support mechanism located at the bottom of the pits in the ground body, used to support the accumulated waste; and a collection mechanism. This utility model achieves good seepage prevention by setting up a collection mechanism, specifically by lining the pits in the ground body and the collection box with a high-density polyethylene (HDPE) geomembrane. Simultaneously, a bentonite waterproofing blanket further fills the geomembrane, enhancing the seepage prevention effect and significantly reducing soil contamination. Liquids generated from the accumulated waste, or rainwater generated during rainy days, are collected in the collection box, and the collected liquid is discharged as wastewater through a drain pipe, thereby significantly reducing air pollution in the surrounding area.

The invention discloses a water quality fusion detection method based on data fusion, and relates to the technical field of water quality detection.The method comprises the steps that a target water area is divided into to-be-detected sub-water areas, the water temperature of a vertical water layer of the target water area is detected, and sampling point selection weight values of the to-be-detected sub-water areas are evaluated according to the depth of the vertical water area; screening a water quality detection sampling area from the to-be-detected sub-water area to carry out water quality detection, counting correlation influence trend characteristics between historical soil loosening depth and historical loosening influence data, outputting to-be-detected correlation trend characteristics, detecting a shore-approaching maximum flow velocity of a shore-approaching sub-water area in the to-be-detected sub-water area and a middle maximum flow velocity of a middle sub-water area, and calculating a to-be-detected correlation trend characteristic; the method comprises the following steps: predicting the current in-shore soil loosening depth and the current middle soil loosening depth with soil loosening, detecting comprehensive soil pollution data, establishing a secondary pollution evaluation model, and evaluating an actual water quality standard evaluation index according to the comprehensive soil pollution data. The water quality detection accuracy can be improved.

This invention relates to the field of regional soil pollution health risk assessment technology, and more particularly to a method for regional soil pollution health risk assessment based on POI data. The method first acquires and preprocesses multi-source heterogeneous data to construct a POI spatial database; then, it uses Kriging spatial interpolation to generate a raster layer showing the spatial distribution of pollutant concentrations; next, it combines kernel density estimation and dynamic weight correction to construct a population activity intensity index surface; subsequently, it dynamically generates exposure assessment units to calculate the daily average exposure dose via multiple pathways for different age groups; finally, it quantifies the health risks via multiple pathways, generates a risk level distribution map, and identifies the dominant POI category in high-risk areas. This invention achieves deep fusion of multi-source data, accurately characterizes the correlation between population activity features and pollution exposure, improves the accuracy and adaptability of the assessment, and provides a scientific basis for pollution prevention and risk management.

The invention relates to the technical field of farmland soil pollution remediation, and discloses an improved soil preparation method for a soda saline-alkali soil dry farmland. The improved soil preparation method for the soda saline-alkali soil dry farmland comprises the following steps that in spring, when surface soil of soda saline-alkali soil is thawed to the depth of 50-100 cm, the surface soil is preliminarily dried till the moisture content is smaller than 35% and the soil bearing capacity is larger than or equal to 20 kpa, harrowing is conducted, the ploughing depth is 10-15 cm, the rotation direction of a tool bit is the longitudinal direction, and the soil crushing rate after operation should be larger than or equal to 60%; the rotating direction of the tool bit is transverse, and the rotating depth is 15-20 cm. According to the soil preparation method, spring improvement can be achieved, the whole construction period is sufficient, the improved land can be used for spring planting in the current year, the phenomenon that the land is idle is avoided, and the combination of transverse and longitudinal soil preparation improvement processes can improve the soil surface environment, reduce water accumulation conditions and reduce saline-alkali obstacle factors; and the improved land can provide a good planting environment.

The application discloses a method for detecting a petroleum hydrocarbon soil pollution plume, and is suitable for a polluted site, especially a service site pollution plume sketching. The application realizes preliminary sketching of a petroleum hydrocarbon pollution plume by coupling a high-density resistance method with a portable modular soil gas stratified sampling method. The portable modular soil gas stratified sampling method uses a portable modular soil gas stratified sampling device to perform stratum sampling, and sets an air inlet interval protection device. When the air inlet interval protection device is not opened, the air inlet interval protection device is in a non-breathable state. Only when the air inlet interval protection device is opened, the air inlet interval protection device has air inlet conditions. The method guarantees sampling accuracy, and has the advantages of low price, high efficiency and improved efficiency.

The application discloses an intelligent soil heavy metal content unmanned aerial vehicle remote sensing monitoring system, and belongs to the technical field of soil environment monitoring. The system comprises an unmanned aerial vehicle flight platform, a multi-source remote sensing load module, an on-board data processing unit, a ground control station and a cloud intelligent analysis platform. The multi-source remote sensing load synchronously collects hyperspectral, multispectral and terrain elevation data; the on-board FPGA chip realizes real-time data preprocessing and abnormality elimination; the cloud is internally provided with a multi-algorithm inversion model library such as PLSR, SVM and CNN, and can invert the distribution of various heavy metal contents, automatically divide pollution grades and give early warnings, and can also analyze the temporal and spatial variation trend and predict pollution diffusion. The application solves the problems of long cycle, high cost and limited coverage range of the traditional monitoring method, realizes rapid, large-area and high-precision real-time monitoring of soil heavy metals, and provides a scientific basis for soil pollution prevention and control decision-making.

The invention belongs to the technical field of ecological risk identification, and particularly relates to a typical karst geology high background area ecological risk rapid identification method based on soil geochemical data, and the method comprises the following steps: S1, determining indexes affecting the biological activity of heavy metals such as Cd according to the chemical composition of secondary enriched minerals in soil; s2, determining an index critical value of soil secondary enrichment mineral formation according to the indexes screened out in S1; s3, on the basis of GB 15618-2018, establishing an ecological risk rapid identification method in combination with the index critical value determined in S2; and S4, selecting soil geochemical data of a typical karst geology high background area, and verifying the rapid ecological risk identification method. According to the method, the ecological risk of the karst geology high background area can be rapidly and effectively divided through area soil geochemical data, the accuracy degree of the method is far higher than that of a division method only according to the Soil Environment Quality Agricultural Land Soil Pollution Risk Management and Control Standard (GB 15618-2018), and the method has good market application prospects.

The invention discloses a method and a device for identifying rare earth ore soil pollution by using a leaf spectrum, a data acquisition device is adopted to obtain reflection spectrum data of vegetation leaves, the reflection spectrum data is input into a computer, and a processed spectrum is obtained in a data preprocessing module of the computer; meanwhile, a surface soil sample is collected, and the heavy metal content in the surface soil sample is obtained; the processed spectrum is decomposed into a plurality of intrinsic mode function components and a residual term in a multivariate empirical mode decomposition module, then correlation analysis is carried out on the plurality of intrinsic mode function components and the heavy metal content in a data processing cabinet, intrinsic mode function component wave bands with weak correlation are removed, and the heavy metal content is obtained; and finally, constructing a non-linear prediction model by adopting a random forest regression algorithm, and outputting a predicted soil heavy metal content value in the non-linear prediction model. According to the method, the rare earth ore soil heavy metal pollution is accurately identified, and the precision higher than that of a current popular method can be obtained.

The invention discloses a territorial space planning environment influence monitoring method, which belongs to the technical field of territorial space planning, and comprises the following steps: dynamically monitoring and collecting heavy metals, organic pollutants, pH value content concentration, vegetation coverage and biological diversity of each piece of monitored soil in territorial space planning by using a data monitoring and collecting module; a data processing and analyzing module is used for sequentially calculating and outputting a soil pollution index TW, an underground water pollution risk index DS and an ecological system health index JP, and based on different score ranges set by a score setting and analyzing unit and the ecological system health index JP of each piece of monitored soil, the score setting and analyzing unit is used for determining the ecological system health index of each piece of monitored soil. According to the technical scheme of the invention, the dynamic sorting and comparison of the priorities and the analysis of existing problems are carried out according to the characteristics of the system, so as to provide improvement suggestions, and the system has the beneficial effects of comprehensiveness, systematicness, real-time performance and perfect feedback mechanism, and provides a more scientific, accurate and practical technical means for the environmental impact monitoring of territorial space planning.

The present application relates to the field of solid waste treatment, and discloses a comprehensive treatment method for rural residual garbage, comprising: arranging sampling points in the area covered by the residual garbage to obtain soil samples of different depths, collecting garbage samples in the area covered by the residual garbage to obtain garbage samples; detecting and analyzing the soil data and the garbage samples to obtain the soil pollution degree level; collecting the utilization status map, the topographic map and the soil map of the area covered by the residual garbage and superimposing them, and dividing the superimposed area into multiple sub-regions; extracting the feature information of each sub-region, grouping the multiple sub-regions into multiple sub-region groups according to the feature information, and obtaining the multiple sub-region groups; for each sub-region group, generating the corresponding treatment mode according to the soil pollution degree level, the soil characteristics and the topographic information. The residual garbage is comprehensively treated according to the corresponding treatment mode. Thus, the garbage plot treatment with pertinence is realized.

A method for zoning and grading evaluation of groundwater pollution in an industrial agglomeration area, in which current enterprise data information of a plurality of enterprises within the industrial agglomeration area is acquired; potential pollution-emitting enterprises are screened based on the current enterprise data information; a pollution monitoring network is constructed based on the potential pollution-emitting enterprises; pollution monitoring data information is acquired through the pollution monitoring network; soil pollution data information of areas near the potential pollution-emitting enterprises is acquired; based on the pollution monitoring data information and the soil pollution data information, groundwater pollution within the industrial agglomeration area is evaluated to obtain an evaluation result; when the evaluation result is greater than a preset evaluation threshold, a graded early-warning signal is generated based on the evaluation result, and a remediation strategy is generated based on the graded early-warning signal.

The application discloses an ISCO remediation system and a remediation method, and the remediation system comprises a multiphase extraction well, a groundwater circulation well and an auxiliary injection well, the multiphase extraction well is connected with a first ground system, the groundwater circulation well is connected with a second ground system, and the auxiliary injection well is connected with a third ground system. The method comprises the following steps: S1, pollution assessment; S2, remediation of a simple soil pollution area; S3, remediation of a simple groundwater pollution area; and S4, remediation of a soil and groundwater composite pollution area. The application provides various remediation wells with different structures aiming at various pollution conditions of soil and groundwater, can realize extraction of NAPL and multi-point synchronous injection of a remediation agent, realizes the purpose of shrinking the boundary of a pollution plume, and thus can achieve good remediation effect and remediation efficiency in a short term and a long term, and has important practical significance for ISCO remediation of soil and groundwater.

The present invention provides a new ground injection method and a ground injection material for utilizing silica material derived from geothermal water for ground improvement without causing soil contamination. [Solution] This is a ground grouting method that uses silica grout derived from geothermal water to produce sand gels and / or homogels with heavy metal contents below environmental standards for soil contamination and / or uniform wastewater standards. Silica grout with a target silica concentration is prepared using silica materials, which is then used to prepare solidified soil specimens. If the heavy metal concentrations in the test solution of the solidified soil measured in a test specified in the "Environmental Standards for Soil Contamination" are below the standard values, the silica grout is used as is; or, if the heavy metal concentrations exceed both the standard values, the silica concentration is reduced by reducing the amount of silica materials so that the heavy metal concentrations are below the standard values. Then, silica colloid obtained by the ion exchange method or the metallic silica method is added to the resulting mixture to adjust the silica concentration to the target value.

The invention belongs to the technical field of pollutant detection, and relates to a polluted site soil investigation and point distribution method and system based on a risk unit and a readable medium, and the method comprises the steps: collecting site soil pollution condition data; inputting the site soil pollution condition data into a pollution site space pollutant concentration prediction model to obtain site pollutant prediction concentration; determining a future utilization scene of the site through a future land planning scheme of the site; determining a risk reference value of the site according to a future utilization scene of the site; according to the site pollutant prediction concentration and the risk reference value, the ecological risk or health risk of the site is evaluated, the risk level of the site is judged, and the risk level area range is delimited; and laying grid point locations of the site according to the risk level area range of the site. According to the method, unnecessary sample collection can be reduced, time, resources and economic cost are saved, and meanwhile, the reliability and authenticity of soil pollution survey results are ensured.

The invention discloses an agricultural land soil pollution risk evaluation method and system based on historical atmospheric heavy metal settlement, and relates to the technical field of pollutant environment evaluation. According to the method, atmospheric heavy metal settlement is used as an influence factor of the agricultural land soil pollution risk, the risk assessment model is constructed based on the BP neural network, the BP neural network is optimized by using the improved seagull algorithm, the optimized assessment model is obtained, the optimization performance of the seagull algorithm is improved, the accuracy of the optimized assessment model is improved, and the risk assessment efficiency is improved. And accurate evaluation of the agricultural land soil pollution risk level is realized. Meanwhile, agricultural land soil pollution simulation is carried out, it can be estimated that how long heavy metal in the cultivated land will exceed the agricultural land soil screening value when the atmospheric settlement source is not cut off, and the blank that the historical atmospheric settlement amount of the cultivated land cannot be evaluated is filled up.