64 results about "Soil contamination" patented technology

The invention discloses an ecological pollution migration path analysis and early warning method and system based on soil heavy metals, and particularly relates to the technical field of ecological pollution. Monitoring points are arranged around a pollution source, micro CT scanning is combined to analyze permeability changes of soil under different humidity, a synchrotron radiation X-ray spectrometer is utilized to analyze dynamic changes of chemical forms of heavy metal, and the influence of humidity changes on migration paths and form transformation is comprehensively evaluated. The deviation degree of a model prediction result and an actual migration behavior is quantified, early warning signals of different levels are generated for the situation with the high deviation degree, corresponding measures are taken, the complex influence of abnormal soil characteristics on heavy metal migration is dynamically responded, and therefore the harm of soil pollution diffusion to the environment and ecology is effectively prevented and controlled.

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 belongs to the technical field of agricultural soil detection, particularly relates to an agricultural soil pollution detection device, and aims to solve the problems that due to mixing of deionized water and a sample, the detection accuracy can be ensured, the sample cannot be quickly conveyed into a mixing box during sampling, qualitative change is easily caused in the conveying process, and the detection efficiency is high. In order to solve the problems, the invention provides the following scheme: the device comprises an equipment box; the protective shell is fixedly installed at the top of the equipment box, and a lifting motor is fixedly installed at the position, located in the protective shell, of the top of the equipment box; the lifting mechanism is arranged in the equipment box and is used for lifting and sampling. The device is simple in structure, when samples are sampled, the samples are scraped onto the material guide plate through the scraping plate, the material guide plate is knocked through the guide rod, the moving speed of the samples is increased, then the situation that qualitative change occurs in the conveying process and the detection accuracy of the samples is affected is reduced, and people can use the device conveniently.

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 embodiment of the invention provides a method for determining the condition of soil pollution caused by livestock and poultry breeding pollution discharge. The method comprises the steps that a livestock and poultry breeding area and a pollution monitoring area in a target monitoring area are determined; dividing the pollution monitoring area into a key monitoring area and a non-key monitoring area based on the position of the livestock and poultry breeding area in the pollution monitoring area and the geographic features of the pollution monitoring area; determining a sampling point position in the key monitoring area according to a first point distribution mode, determining a sampling point position in the non-key monitoring area according to a second point distribution mode, and performing point distribution sampling according to the sampling point position to obtain a soil sample; and carrying out pollutant detection on the soil sample to obtain pollutant data of each sampling point, and inferring the soil pollution condition of the pollution monitoring area caused by pollution discharge of the livestock and poultry breeding area based on the pollutant data. According to the disclosed embodiment scheme, a point distribution sampling scheme with an instructive value is provided for livestock and poultry breeding, and the determined soil pollution condition can reflect the influence of distribution characteristics generated by geographic characteristics.

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 relates to the technical field of soil sampling devices, and discloses a soil sampling device for geological exploration, the soil sampling device comprises a mounting cover and an annular seat arranged below the mounting cover, a plurality of groups of connecting pieces are fixed between the mounting cover and the annular seat, a sampling barrel is arranged in the mounting cover, and a plurality of groups of connecting pieces are arranged in the sampling barrel. Second electric push rods which are symmetrically arranged are fixedly mounted between the sampling barrel and the mounting cover; according to the soil sampling device for geological exploration, sampling of soil at different depths can be automatically completed, the soil is directly distributed into the corresponding sampling boxes, the step of manually transferring the soil is reduced, the operation process is simplified, the sampling efficiency is greatly improved in the automatic sampling process, time and labor force are saved, and the working efficiency is improved. The soil carried by the sampling barrel can be scraped off by the fixed chassis, so that the external soil is prevented from being polluted, the soil carried outside the sampling barrel cannot pollute the internal sample, and the purity of the sample is ensured.

The present invention relates to the technical field of soil pollution detection, and particularly to an intelligent detection method and system for soil heavy metal pollution. The method includes: collecting soil multi-source information and regional environmental parameters of the soil to be tested, and identifying soil pollution characteristics according to the soil multi-source information; establishing a pollution identification analysis model based on the soil pollution characteristics and regional environmental parameters to analyze whether the soil to be tested contains heavy metal pollutants; if heavy metal pollutants are contained, predicting the pollution diffusion path of the heavy metal pollutants in time and space according to the pollution identification analysis model; if no heavy metal pollutants are contained, performing a time series analysis on the soil pollution characteristics, monitoring and analyzing the future concentration distribution of the heavy metal pollutants, and establishing a pollution risk warning. Through the present invention, the problems in the traditional soil heavy metal detection method, such as long sampling and analysis time, inability to dynamically monitor the change of pollutant concentration in real time, insufficient accuracy of diffusion prediction, and difficulty in comprehensively evaluating high-concentration and potential risk areas, are effectively solved.

The invention discloses an ion type rare earth ore jet flow multi-branch drilling flow guide infiltration method suitable for a loose ore bed, and relates to the technical field of rare earth mining, a liquid injection mother hole is vertically and downwards drilled in a surface soil layer of a mining area, and a water jet flow drilling mechanism is used for drilling multi-branch drilling holes in the rare earth ore bed with the liquid injection mother hole as the center; and after the drilling work is completed, subsequent liquid injection engineering arrangement is perfected, and then the ore leaching liquid in the high-level liquid pool is conveyed into the liquid injection mother holes through the height difference pressure, so that the ore leaching liquid can be diffused to the periphery in a large range under the flow guide effect of the multi-branch drill holes. The ion type rare earth ore body hole-crack structure is improved through the interference effect between jet flow impact drilling and branch holes, the ore body permeability is enhanced, efficient mining of ion type rare earth is achieved, meanwhile, the surface soil layer construction amount can be greatly reduced, the liquid injection pressure is reduced, the landslide risk and soil body pollution caused by liquid injection are effectively avoided, and the service life of the ion type rare earth ore body is prolonged. The method is helpful for innovating the field process technology and improving the economic and social benefits of enterprises.

The invention discloses a soil heavy metal pollution ecological risk assessment method and system, and relates to the technical field of soil pollution risk assess.The method comprises the steps that a topsoil mixed sample in a land parcel needing ecological risk assessment is collected, and the topsoil mixed sample is obtained according to the national soil pollution condition detailed investigation soil sample analysis and test method technical regulation; heavy metal elements in the surface soil mixed sample are analyzed and determined; for the analyzed and determined heavy metal elements, obtaining 10% inhibition effect concentration EC10 of different heavy metal elements on barley, and standardizing the EC10; calculating a risk quotient of each heavy metal element by taking the standardized EC10 as an ecological risk reference value, adding the risk quotients of the heavy metal elements to obtain a total risk quotient of the topsoil mixed sample, and performing ecological risk assessment on the topsoil mixed sample; according to the method, EC10 is taken as an ecological risk reference value, the risk quotient of each heavy metal element is calculated, and then refined ecological risk assessment of soil heavy metal pollution is realized.

The invention aims to provide a strip mine soil heavy metal pollution range evaluation method for solving the problems of the existing soil heavy metal pollution range evaluation technology. The method comprises the steps of sampling point arrangement, sampling and detection, vertical depth heavy metal distribution simulation, heavy metal distribution estimation in different depth horizontal extension directions, and heavy metal distribution contour line making. According to the method provided by the invention, the heavy metal distribution conditions of different depths corresponding to different positions of the strip mine pollution source can be obtained according to the known pollutant content information of the soil sampling point, so that the heavy metal distribution isopleth of the soil pollution area in the vertical direction and the horizontal direction is made; and a land treatment mode or a reclamation mode of the mine can be guided through the isoline of heavy metal distribution.

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.

To provide a management method of stable solution and a management device of the stable solution suppressing deterioration of the stable solution caused by contamination of cement.SOLUTION: A control section of a management unit 30 calculates a concrete component elution amount upon excavation using density of fluidization treatment soil F1 in a pile hole h1, a mixture ratio of fluidization treatment soil F1 for an excavation soil amount, cement weight density in the fluidization treatment soil F1, and a sediment mixed ratio in stable solution upon excavation. The control section calculates a cement contamination amount corresponding to the reapplication number using the concrete component elution amount and loss factor calculated upon the excavation. The control section calculates a limit reapplication number of the maximum reapplication number when the calculated cement component elution amount is equal to or less than a deterioration reference value, and stops supplying the stable solution to the pile hole h1 when reaching a predetermined reapplication number corresponding to the limit reapplication number.SELECTED DRAWING: Figure 1

The invention discloses an ISCO repair system and method, the repair system comprises a multiphase extraction well, an underground water circulation well and an auxiliary injection well, the multiphase extraction well is connected with a first earth surface system, the underground water circulation well is connected with a second earth surface system, and the auxiliary injection well is connected with a third earth surface system. The method comprises the following steps: S1, pollution assessment; s2, repairing a pure soil polluted area; s3, repairing a pure groundwater polluted area; and S4, repairing the soil and underground water combined pollution area. Aiming at various pollution conditions possibly existing in soil-underground water, the invention provides a plurality of remediation wells with different structures, can realize extraction of NAPL and multi-point synchronous injection of a remediation agent, and realizes the purpose of shrinking a pollution plume boundary, so that a good remediation effect and remediation efficiency can be achieved in a short period and a long period, and the remediation effect is good. And the method has important practical significance on ISCO remediation of soil-underground water.

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 provides a soil pollution monitoring method and device, and belongs to the technical field of environmental protection. The method comprises the following steps: determining coordinates of a plurality of first sampling points based on pollution source distribution, pollution source types and geological features of a to-be-monitored area so as to obtain a plurality of first sampling data; determining coordinates of a plurality of second sampling points based on the first sampling data so as to obtain a plurality of second sampling data; and processing the first sampling data and the second sampling data to obtain a soil pollution monitoring result of the to-be-monitored area. According to the invention, a pollution source and an area possibly influenced by the pollution source can be covered in a targeted manner for sampling and soil pollution monitoring, so that the number of unnecessary sampling points is reduced, the sampling efficiency and representativeness are improved, and the accuracy of a soil pollution monitoring result is ensured.

The invention discloses a device for conveniently analyzing the distribution of soil nutrients in a root box and a method for using the device, comprising a root box body, a soil extractor punching plate, a soil guide punching plate and a container punching plate; the root box body is in a U-shaped structure; a back baffle and a front baffle are respectively arranged on the front and rear sides of the root box body; protrusions are fixedly connected to the outer sides of both sides of the front baffle and the back baffle; a plurality of clamping blocks are slidably connected between the mutually corresponding protrusions, and the clamping blocks are in a U-shaped structure; the soil in the root box body is collected by sleeve-setting with a first hollow column, so no matter it is inserted into the soil or pulled out of the soil, the soil will not fall off and be contaminated with each other. In the case of limiting the soil with the help of the back baffle and the insertion hole, the soil will not be mixed during the insertion and extraction process, so that the possibility of soil contamination between different areas is lower, and the measured data is more accurate.

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 present invention provides a monitoring system and method for landfill pollution risk prevention and control, belonging to the technical field of landfill pollution risk prevention and control, the method comprises: obtaining leachate pollution degree, gas pollution degree, groundwater pollution degree, soil pollution degree and overall pollution degree, performing surface fitting operations respectively, obtaining first pollution reference domain, second pollution reference domain and third pollution reference domain respectively, and adjusting the real-time leachate pollution degree, real-time gas pollution degree, real-time groundwater pollution degree and real-time soil pollution degree based on the first pollution reference domain, the second pollution reference domain and the third pollution reference domain, so that the real-time overall pollution degree is less than the landfill pollution risk prevention and control threshold. The landfill pollution risk can be prevented and controlled, and the landfill pollution risk can be reduced in time.

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 discloses a subsidence area reclamation land soil profile reconstruction method based on coal gangue ceramsite, relates to the technical field of subsidence area reclamation land soil reconstruction, and solves the problems that in the prior art, reclamation soil is filled with coal gangue and fly ash, coal-based solid waste is directly adopted as a filling matrix, then a soil layer is covered for reclamation, and the soil is not easy to reconstruct. The productivity recovery of the reclamation land is slow, and harmful substances in the coal gangue and the fly ash are extremely easy to migrate, so that the soil pollution of the reclamation land is caused. A subsidence area reclamation land soil profile reconstruction method based on coal gangue ceramsite comprises the following steps that S1, coal gangue larger than 5 mm is crushed to form coal gangue powder, and then the coal gangue powder, an adhesive and a fly ash expansion curing agent are mixed and made into pellets; through layered construction, a reasonable soil profile structure is optimized, the soil quality of the reclamation land is improved, the productivity of the reclamation land can be rapidly recovered, and meanwhile safe absorption of coal-based solid waste such as coal gangue and coal ash is achieved.

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.