27 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 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 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 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 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 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.

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 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 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.

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 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.

The application discloses an experimental device for monitoring soil oil spill rate and soil particle migration, and belongs to the technical field of soil pollution monitoring. The device is composed of an oil supply and temperature control system, a soil simulation unit, a collaborative monitoring system, a separation and recovery system and a data processing system. The oil supply and temperature control system realizes accurate oil supply through a constant temperature oil bath box, a peristaltic pump, an electromagnetic control valve and a flow sensor. The soil simulation unit adopts a high-transmittance acrylic transparent experimental tank, and is internally provided with a layered soil filling module and a porous distribution plate, so that the oil liquid can be uniformly infiltrated. The collaborative monitoring system comprises an oil spill rate monitoring module, a soil particle migration monitoring module and an auxiliary monitoring component. The separation and recovery system realizes oil liquid recycling and recycling and particle collection through multi-stage filtration and centrifugal separation. The application realizes collaborative non-invasive monitoring of the oil spill seepage process and soil particle migration, and provides precise experimental data support for soil pollution prevention and control.

The invention discloses a fluid stabilized soil compaction-free compaction pile composite foundation treatment method, and relates to the technical field of soil pollution control and governance, which comprises the following steps: while the quality is controllable in compaction pile construction, preparing fluid stabilized soil, absorbing building and industrial solid wastes, and forming a pile body by adopting pressure perfusion of the fluid stabilized soil, so as to form a compaction pile body; the difficult problem of compaction pile forming in a sand inclusion, large-thickness and high-saturation-degree field with the maximum treatment depth of 30 meters is solved, and in-situ long-acting locking of pollutants is achieved; the safety, the repairing efficiency and the engineering applicability of foundation treatment are improved, and the engineering applicability of compaction is widened.

This invention relates to the fields of environmental information technology and spatial data technology, and provides a method and system for generating spatial concentration fields for soil contaminated site assessment. The method includes: acquiring a discrete monitoring point dataset; preprocessing the monitoring point dataset to obtain a valid monitoring point dataset; selecting N normal monitoring point data points, setting N main pollution ranges, assigning pollutant concentration values ​​to the data points exceeding limits, obtaining the assigned valid monitoring point dataset, and constructing a grid; setting the power exponent p for inverse distance weighted interpolation based on the number of monitoring points n in the valid monitoring point dataset; and performing inverse distance weighted interpolation calculation on the constructed grid based on the assigned valid monitoring point dataset and the power exponent p to generate a spatial concentration field. This invention can classify and adaptively process monitoring data, and dynamically optimize interpolation parameters according to the inherent spatial structure of the data, which is of great significance for improving the accuracy and reliability of soil contaminated site assessment.

This utility model discloses a system for simulating the migration of pollutants in tailings within soil layers, relating to the field of tailings pollution detection, to address the problem that existing technologies struggle to accurately assess the risk of tailings pollution to soil. The detection system includes: a simulated rainfall device with an adjusting component connected to a first nozzle, the adjusting component adjusting the water output of the first nozzle; a leaching device having a first receiving cavity for holding tailings, with multiple first leaching holes at its bottom for filtering tailings leachate; a first collection tank for collecting the leachate; a second nozzle connected to the first collection tank for spraying the leachate; a second receiving cavity located below the second nozzle, containing different soil layers sequentially, with second leaching holes at its bottom for filtering the leached leachate from different soil layers; a second collection tank located below the second receiving cavity for collecting the leached leachate; and a first sensor installed in each collection tank for detecting the total dissolved solids content and heavy metal ion concentration in the leachate and leached leachate.

This invention relates to the field of soil monitoring technology, and in particular to a method and system for dynamically adjusting soil-groundwater pollution risk thresholds based on an environmental model. The method includes: collecting soil and groundwater monitoring data; constructing an environmental model including soil pollution concentration, groundwater pollution concentration, and pollutant migration rate; obtaining comprehensive pollution characteristic data; extracting key features and determining the contribution of each feature to risk assessment; calculating the initial weights of each feature based on their contribution and obtaining a weight allocation scheme; calculating soil and groundwater pollution risk values ​​by combining pollution load data and weight values, and initially setting risk thresholds; monitoring pollutant concentration fluctuation data in real time; predicting pollutant migration trends using time series analysis algorithms and obtaining risk change prediction results; and optimizing the risk thresholds by combining the risk change prediction results and environmental capacity constraints to obtain dynamically adjusted risk thresholds. This invention achieves accurate extraction of pollution features and dynamic adjustment of weights.

The invention discloses a multifunctional geological exploration surveying and mapping device which comprises a vehicle-mounted table and combines a drilling unit, a sampling unit, a switching unit, a transfer unit, a surveying and mapping unit, a sealing unit, a refrigeration unit and a hydraulic control unit in a vehicle-mounted mode. The functions of geological exploration and geological surveying and mapping are more diversified and integrated, outdoor carrying is facilitated, operation is conducted by workers, meanwhile, the relevance between the units is high, drilling equipment does not need to be moved, a soil layer in the deep position of a drilled hole is sampled manually, and the working efficiency is improved. The soil sampling device is simple in structure and convenient to operate, soil sampled after drilling is more automatically discharged into the sampling barrel, manual operation is reduced, the risk that the soil is polluted when stored in the sampling barrel is reduced, and the sampling barrel can be sealed and refrigerated so that workers can conveniently process and analyze the water content and the soil quality of a soil sample in the follow-up process.

The present application relates to the technical field of soil detection, and more particularly to a hydrogeological soil pollution characteristic detection method and system, which comprises the following steps: S1: dividing multiple sampling units reflecting different water flow behaviors and arranging sampling points; S2: synchronously collecting soil samples and water samples at each sampling point and simultaneously acquiring topographic attribute data of each sampling point; S3: calculating a hydrological activity coefficient of each sampling point based on the topographic attribute data of the sampling point; S4: calculating a proportion share to be extracted from the soil sample of each sampling point; S5: calculating a proportion share to be extracted from the water sample of each sampling point; S6: determining a total mass ratio of water and soil when a mixed slurry is prepared; S7: mixing to prepare a final sample of a water-soil mixed slurry according to the calculated water-soil shares and mixing ratio; and S8: detecting pollutants and their concentrations in the final sample. The present application can effectively improve the predictability and accuracy of the detection result of the pollution characteristics in the hydrogeological soil.