242 results about "Pollution Remediation" patented technology

The invention provides a contaminated site remediation technology scoring system which comprises a multi-dimensional evaluation index system construction module, a situational weight dynamic adjustment module, a remediation technology applicability scoring module, an uncertainty analysis and sensitivity test module, a scoring result visualization module, a technical scheme sorting and screening unit and the like. Through four innovations of a dynamic weight adaptation mechanism, a multi-model fusion scoring algorithm, a technology combination scheme evaluation module and uncertainty robust analysis, the problems of single dimension, weight solidification, difficulty in quantification of a synergistic effect and the like in pollution remediation technology evaluation are systematically solved; and an objective, efficient and transparent intelligent decision-making tool is provided for repairing a complex polluted site.

The invention provides a multi-modal big language model inference engine which comprises a pre-training big language model adaptation layer, a pollution remediation knowledge graph enhancement module, a multi-modal information understanding and fusion unit, a technology implementation optimization module and an inference chain and decision interpretation generator. The system adopts a hierarchical modular design, all components communicate through a standardized API interface, efficient and stable data circulation is ensured, and the problems of knowledge application limitation, opaque reasoning process, difficulty in professional knowledge fusion, knowledge updating lagging, limited multi-modal data processing capability and the like in the existing contaminated site remediation decision process are solved.

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The invention relates to the technical field of soil heavy metal pollution remediation, and particularly discloses a preparation method of iron-modified biomass charcoal, which comprises the following steps: preparing garden waste into biomass charcoal (PBC), and then carrying out iron modification by using FeCl3 to obtain iron-based biomass charcoal (PIBC). The invention further provides a method for repairing the cadmium-arsenic combined polluted soil through the iron-modified garden waste biochar. The method comprises the steps that the iron-modified biomass charcoal prepared through any method is added into the soil; the iron-modified biomass can be applied as a base fertilizer at one time, and is turned over to be fully and uniformly mixed with a plough layer of soil. By adopting the method disclosed by the invention, the bioavailability of Cd / As in the soil can be synchronously reduced, and waste resources are utilized to realize pollution control by waste.

This invention discloses an electrically controlled enrichment catalytic membrane, its preparation method, and its application in water treatment, belonging to the field of environmental organic pollution remediation technology. The electrically controlled enrichment catalytic membrane comprises a substrate layer and a copolymer coating layer with reversible electro-oxidation-reduction properties. The substrate layer is a titanium suboxide conductive ceramic membrane with a pore size of less than 1 micrometer, and the copolymer coating layer is an organic blend polymer TMA containing nitro radical functional groups. x -co-TMPMA (1‑x) Where x% represents the degree of oxidation. This invention also provides an application of the above-mentioned electrically controlled enrichment catalytic membrane in water treatment for the removal of organic pollutants. The electrically controlled enrichment catalytic membrane is used as a filter membrane in an electrochemical water treatment device. Two filter membranes are connected to the two poles of an AC power system, with the positive and negative poles reversing during a cycle. The polluted solution is controlled to flow sequentially through the two filter membranes. By adjusting the positive and negative bias parameters on the filter membranes, hydrophobic organic pollutants in the polluted solution are adsorbed and oxidized for removal. This method is energy-saving, environmentally friendly, and easy to operate.

The invention discloses a preparation method of an iron-doped cerium-based perovskite type high-selectivity Cu ion capture stabilizing agent and application of the stabilizing agent in heavy metal pollution remediation, and the stabilizing agent is prepared through a sol-gel method and comprises the steps that cerous nitrate and citric acid are dissolved in water, and the mixture is heated and stirred to be gel-shaped; standing the gel solution in a drying oven at a constant temperature to obtain a Fe-Ce-PVSK precursor; grinding the precursor into powder, putting the powder into a quartz boat, and calcining in an air atmosphere through a horizontal tube furnace to obtain a product; and finally, washing to be neutral to obtain the iron-doped cerium-based perovskite stabilizing agent. Due to the high oxygen vacancy concentration and rich active sites, the stabilizing agent has high selectivity and high adsorption capacity and has specific capturing capacity on Cu < 2 + >. The preparation method has mild reaction conditions. The stabilizing agent can effectively reduce the bio-availability of heavy metals in a polluted matrix, promote healthy growth of plants, and realize pollution restoration and ecological function recovery at the same time.

The invention discloses a soil or groundwater remediation agent in-situ precise injection and transmission effect evaluation test system, and belongs to the technical field of stratum pollution remediation. The device comprises a stratum simulation assembly, a stratum pressurization assembly and a parameter detection assembly, wherein the stratum simulation assembly comprises an experimental silo for storing a simulated stratum sample; the stratum pressurization assembly is arranged opposite to the experiment silo and can simulate pressure of different stratum depths; the parameter detection assembly comprises a plurality of pressure detection units which are vertically arranged at intervals along the experimental silo, each pressure detection unit comprises a capillary pressure measuring pipe and a plurality of pressure sensors, the capillary pressure measuring pipes are arranged in the radial direction of the experimental silo, and one end of each capillary pressure measuring pipe is communicated with the simulated stratum sample through the experimental silo; and the plurality of pressure sensors are arranged at intervals along the capillary piezometric tube so as to test the osmotic pressure of different positions of the capillary piezometric tube. Laboratory simulation can be carried out on the process of repairing the polluted stratum by the repairing liquid.

The present application relates to the technical field of environmental pollution remediation, and particularly relates to a garbage landfill coupled with contaminated soil remote remediation system and method. The method comprises the following steps: deep layer sampling and soil sample characteristic classification are performed on the remote remediation contaminated soil heap to obtain remote remediation soil samples corresponding to different pollution types; purified biogas is used as a heat source to perform organic pollution desorption and conversion and solidification and stabilization coupled remediation, and a solidification and stabilization remediated heavy metal-containing soil sample is generated; chemical environmental impact assessment analysis and cyclic remediation treatment are performed on the solidification and stabilization remediated heavy metal-containing soil sample to generate a soil sample after organic pollution and heavy metal remediation; fly ash landfill reuse is performed on the soil sample after organic pollution and heavy metal remediation to generate a remote fly ash landfill reuse soil after remediation. The present application can combine garbage landfill resources and remote contaminated soil remediation to realize corresponding soil cyclic reuse.

The invention relates to the field of soil pollution remediation, and discloses a remediation device for soil heavy metal pollution remediation and a using method thereof.The remediation device for soil heavy metal pollution remediation comprises an acid mist absorption tower which is arranged on the top face of the ground; a purifying assembly, a crushing assembly, a screening assembly, a humidifying assembly, a transferring assembly, a stirring assembly and a protecting assembly are arranged on the ground. According to the remediation method for soil heavy metal pollution remediation, pollution in soil is effectively detoxified through screening and crushing, reduction reaction, deacidification, neutralization reaction, dehydration and re-burying, the original pollution in a soil leachate is larger than or equal to 2000 mg / kg, the total chromium content is larger than or equal to 10000 mg / kg and is reduced to be smaller than or equal to 3 mg / L, the total chromium content is smaller than or equal to 9 mg / L, Ni is smaller than or equal to 50 mg / L, meanwhile, the pH ranges from 6 to 9, and the remediation effect is good. And acid mist generated in the reduction reaction process can be pumped into the acid mist absorption tower by the anti-corrosion induced draft fan, is neutralized by alkali in the acid mist absorption tower, and is discharged after reaching the discharge standard through the discharge pipe.

The application discloses an L-cysteine-based soil lead pollution leaching agent and a preparation method thereof, and belongs to the technical field of soil heavy metal pollution remediation. The L-cysteine-based soil lead pollution leaching agent comprises the following raw materials: an L-cysteine solution, a pH buffer and a polyvinylpyrrolidone solution; the concentration of the L-cysteine solution is 0.3-0.5 mmol / L, the concentration of the pH buffer is 1 mmol / L, and the mass fraction of the polyvinylpyrrolidone solution is 0.003%-0.005%; the volume ratio of the L-cysteine solution, the pH buffer and the polyvinylpyrrolidone solution is 1:1:0.15-0.4. The leaching agent has a remarkable leaching effect on soil lead, and the removal rate of the leaching agent on the contaminated soil with a Pb content of more than 500 mg / kg can reach more than 85%, so that the leaching agent can effectively prevent lead from migrating through the soil into a food chain or a water environment, and is much stronger than a traditional carboxyl-based leaching agent.

The invention relates to the technical field of soil pollution remediation, and particularly discloses a mineralization stable remediation method for soil heavy metal pollution. The remediation method strictly follows the principle of ecological compatibility of soil, in-situ remediation of farmland soil heavy metal pollution is achieved, and meanwhile the soil fertility can be effectively improved; the construction of a remediation system can be completed by virtue of soil-flora optimization proportion and formation of carbon-based compound bacteria with biochar, and by virtue of the carbon-based compound bacteria, pollution of heavy metals such as arsenic and cadmium in contaminated soil can be well remedied, and the content of organic matters in the soil can be remarkably increased, so that the soil fertility of the soil is improved; the remediation method provided by the invention has both ecological safety and wide applicability, provides a feasible solution for green and sustainable treatment of large-area moderate-light heavy metal polluted farmland, and can be popularized to field soil for application.

The invention belongs to the technical field of agricultural equipment, and relates to a crushing and pesticide mixing device for soil pollution remediation, which comprises a movable frame, a connecting seat, two mounting plates, a crushing mechanism, a fixed shaft, an avoiding groove, a plurality of pesticide feeding holes, a transmission cylinder, a plurality of groups of spray pipes, a plurality of spray holes and a pesticide feeding mechanism, and the rotating mechanism is used for driving the transmission cylinder to drive the multiple sets of spraying pipes to rotate, liquid medicine is fed into soil of different depths, and meanwhile the soil is stirred. The crushing mechanism is arranged at the front end of the movable vehicle frame, the pesticide spraying mechanism composed of the fixed shaft, the transmission cylinder and the multiple sets of spraying pipes is arranged at the front end of the movable vehicle frame, soil crushing and pesticide spraying can be conducted firstly, the multiple sets of spraying pipes are driven to rotate through the rotating mechanism, liquid pesticide is fed into soil of different depths, and meanwhile the soil is stirred; and the soil and the medicine can be mixed more uniformly, different medicine concentrations in the soil with different depths are avoided, soil remediation is accelerated, and the soil remediation effect is improved.

The utility model discloses a soil pollution abatement device based on microbial remediation technology, comprising: a main body unit comprising a work box and a conveying assembly, the work box is symmetrically provided with a rectangular opening and two connecting ports, the conveying assembly penetrates through the two connecting ports, and the conveying assembly is provided with a placing groove body; and the repairing unit comprises a liquid storage box, a connecting box and a mounting frame, and the liquid storage box is fixedly mounted on the upper end face of the working box. The harrow rod teeth are inserted into soil in the containing groove body, repairing liquid medicine is discharged from the liquid outlet holes, the gear motor is started, the output end of the gear motor drives the threaded rod to rotate, the threaded rod drives the moving rod to move through the threaded sleeve, the moving rod drives the mounting frame and the harrow rod teeth to move, and therefore the harrow rod teeth can turn over the soil in the containing groove body; and therefore, the remediation liquid medicine can be sprayed on the soil at the lower end, and the remediation effect on microorganisms in the soil is improved.

The invention belongs to the technical field of soil heavy metal pollution remediation, and discloses an acid soil cadmium-reducing modifier, a preparation method, a use method and application, the modifier is formed by mixing sulfydryl minerals, biochar and a compound organic fertilizer according to a certain configuration, the sulfydryl mineral is prepared from calcium carbonate, bentonite and 3-mercaptopropyl triethoxy silane. When the soil conditioner is used, the soil conditioner is uniformly applied to a soil plough layer by 0-20 cm manually or mechanically, and the applied soil conditioner accounts for 1-5% of the mass of soil or is 180-220 kg / mu. The soil cadmium-reducing modifier can obviously reduce the effective state content of heavy metal cadmium in the soil, so that the cadmium content in planted rice grains is obviously reduced, the organic matter content of the soil is obviously increased, the ecological environment of polluted farmland soil is improved, the growth of the rice is promoted, and the yield of the rice is increased. The soil conditioner disclosed by the invention is simple to prepare and environment-friendly to soil, and safe utilization of cadmium-polluted farmland soil can be realized.

The present disclosure provides a soil pollution remediation control method, system, medium and computer program product, the method comprising: obtaining initial soil pollution data of an actual contaminated site to obtain a corresponding target remediation scheme; the target remediation scheme comprises a plurality of sub-remediation schemes, each sub-remediation scheme comprising at least one remediation technology; obtaining a target mapping model matched with the sub-remediation scheme; generating a remediation control instruction corresponding to the sub-remediation scheme based on the target mapping model, and determining a matched remediation device; issuing the remediation control instruction to the matched remediation device to perform corresponding remediation operations. The present disclosure can remotely control the on-site device based on the platform, and can also dynamically monitor the soil changes and device states during the remediation process in real time, so as to timely and adaptively make targeted remediation adjustments to ensure the accuracy and timeliness of the remediation control, improve the remediation quality and efficiency of the soil, and achieve the effect of intelligent operation construction.

The invention relates to an in-situ preparation method and application of an earthworm cast-based blocking and controlling agent for soil Cd pollution, and the preparation method comprises the following steps: (1) uniformly mixing cow dung, a bulking agent and biochar, and adjusting the water content to 55-75% to obtain a mixture; (2) performing primary fermentation on the mixture obtained in the step (1) to obtain an earthworm bed base material; (3) spreading the earthworm bed base material obtained in the step (2) in a strip shape, putting a plurality of adult earthworms, and culturing to obtain earthworm raw manure; and (4) carrying out secondary fermentation, drying, crushing and sieving, stirring, heating and granulating, cooling, secondary sieving, packaging and inspecting on the earthworm cast collected in the step (3) to obtain the target earthworm cast-based blocking and controlling agent. The earthworm cast-based blocking and controlling agent is prepared through multi-step process optimization in-situ production, multiple functions of earthworm cast in soil Cd pollution remediation, nutrient improvement and plant growth promotion are achieved, and then the goals of soil heavy metal pollution relief treatment and high-yield and high-quality production are achieved.

The utility model relates to an ecological floating bed for water environment pollution remediation, which comprises a floating platform, two sealing cover parts, a windproof cover and a planting matrix accommodating cover, the two sealing cover parts are symmetrically arranged on two opposite sides of the floating platform, and the two sealing cover parts and the floating platform are detachably connected and fixed through a plurality of fasteners; the planting matrix containing cover is installed on the sealing cover part located at the bottom of the floating platform, an aquatic plant planting matrix is arranged in the planting matrix containing cover, the wind-proof cover is installed on the sealing cover part located at the top of the floating platform, and an opening through which aquatic plants can penetrate is formed in the wind-proof cover. According to the ecological floating bed, the windproof cover is mounted on the sealing cover part at the top of the floating platform, and the opening through which the aquatic plants can penetrate is formed in the windproof cover, so that normal growth of the aquatic plants is guaranteed, direct impact of strong wind on the aquatic plants can be effectively blocked in windy weather, the aquatic plants are prevented from being blown away, and the wind resistance of the ecological floating bed in severe weather conditions is improved.

The application discloses a cadmium-resistant proteus mirabilis and application thereof in treatment of composite pollution environment. Priestia megaterium The application provides a PBAT-degrading bacterium, i.e., a proteus mirabilis (S261-3) strain, which can grow at a temperature of 10-50 DEG C and has certain salt and cadmium resistance, and can grow normally in a high-salt or high-cadmium concentration range. Meanwhile, the S261-3 strain has a good PBAT-degrading effect, and can degrade PBAT under cadmium stress, and can be used for degrading plastic pollutants in cadmium-polluted soil. The microbial strain provided by the application has stronger adaptability to a polluted environment, meets the repair demand of a composite pollution site, can be used for comprehensive treatment of microplastic and heavy metal composite pollution, is helpful to improving soil quality and improving land utilization efficiency, and has important practical significance for soil composite pollution repair.

The embodiment of the application relates to the field of artificial intelligence technology, and discloses a soil big data analysis method and device based on artificial intelligence and a storage medium, which realizes multi-dimensional soil data dynamic collection and analysis through integrated hardware equipment of a telescopic sampling module, a soil humidity detection module and a heavy metal content detection module. First, after triggering an instruction at different preset time periods, the telescopic sampling module is used to obtain soil samples layer by layer, then the humidity and heavy metal content data of each layer of soil are synchronously detected and input into a multi-modal model for analysis, and finally the dynamic correlation between soil humidity and heavy metal content and intensity evaluation are output. In this way, through multi-depth, multi-time point sampling and modalized data integration, the limitation of traditional single-point static analysis is broken through, the spatial heterogeneity and time evolution characteristics of soil pollution are accurately captured, and accurate data support is provided for soil pollution remediation strategy optimization and environmental policy making.

The invention belongs to the technical field of soil pollution treatment, and particularly relates to modified biochar as well as a preparation method and application thereof. The preparation method of the modified biochar comprises the following steps: S1, pretreatment of a biomass material: mixing the biomass material with cellulase and water, then carrying out pre-decomposition treatment to obtain a pretreatment liquid and a pretreatment solid, and mixing the pretreatment liquid with a surfactant to obtain a binder; s2, performing calcination treatment on the biochar: performing first calcination treatment on the pretreated solid, loading the obtained biochar intermediate material on the surfaces of the inner core cluster particles through a binder to form composite microsphere particles, and performing second calcination treatment and modified calcination treatment on the obtained composite microsphere particles in sequence. The modified biochar provided by the invention can adsorb cations and anions at the same time, further adsorption and passivation effects of core functional group substances are combined, and the structural design of'synergistic adsorption and long-acting slow release 'realizes synergistic treatment and long-acting passivation effects on heavy metal combined pollution in soil.

The utility model relates to the technical field of soil pollution remediation agent mixing equipment, in particular to a mixing device for soil pollution remediation, which comprises a mixing cylinder, the mixing cylinder comprises a cylinder body and a top shell, the top shell is mounted on the upper end face of the cylinder body and fixedly connected with the cylinder body, an upper cover is mounted on the upper end face of the top shell, and a lower cover is mounted on the lower end face of the top shell. The upper cover comprises an outer ring shell plate and a center shell plate, the outer ring shell plate is fixedly connected with the top shell in an inserted mode, the center shell plate is rotationally installed at the center of the outer ring shell plate, and a suspension frame is fixedly installed on the upper end face of the center shell plate. The mixing cylinder is designed to be of a structure that the cylinder body and the top shell are matched with each other, the upper cover can be mounted through the top shell when the mixing cylinder is easy to use, and meanwhile, the upper cover is arranged to be of a structure that the outer ring shell plate and the central shell plate are matched with each other, so that the central shell plate can be driven to rotate in a reciprocating manner through the reciprocating assembly when the mixing cylinder is used.

The application belongs to the field of microorganisms and the field of environmental protection, and provides at least one urea-producing Paenarthrobacter ureafaciens for degrading atrazine, wherein the urea-producing Paenarthrobacter ureafaciens is preserved in the China General Microbiological Culture Collection Center of the Institute of Microbiology, Chinese Academy of Sciences, located at No. 1, Xiliujia, Beijing Chaoyang District, and has the preservation numbers of CGMCC No. 37944 or CGMCC No. 37943, respectively. The application obtains the urea-producing Paenarthrobacter ureafaciens with high efficiency, wide spectrum and strong environmental adaptability through screening, and finally realizes rapid and complete repair of atrazine contaminated soil by matching an optimized microbial agent formula and a preparation process, so as to reduce repair cost, promote the large-scale application of the microbial repair technology in farmland and industrial pollution sites, and solve many technical bottlenecks in the field of atrazine pollution repair.

This invention relates to the fields of environmental pollution remediation and biocatalysis, and provides a method for preparing a self-supplied H2O2 cathode material via an electroenzyme cascade and its application. The cathode material is an ionic liquid-modified CPO-IL. EMB The bio-hybrid material formed by immobilizing molybdenum disulfide-modified MoS2@Co-CNNT composite material, namely CPO-IL EMB / MoS2@Co-CNNT. An electroenzyme cascade degradation system was constructed using this biohybrid material as the cathode. By controlling the electrode potential, controllable H2O2 generation was achieved while protecting the Fe(III) in the iron porphyrin ring of CPO from reduction, thus maintaining the intrinsic oxidative activity of the enzyme. The in-situ generated H2O2 activates CPO-IL. EMB It efficiently catalyzes the oxidative degradation of mesotrione. This invention requires no external CPO-IL. EMB It is green and environmentally friendly, with high degradation efficiency, and has promising applications in agricultural wastewater treatment and environmental remediation.

The application discloses a kind of bipolar high-voltage electrode soil remediation device and method based on infrared imaging regulation and control, it is related to soil pollution remediation technical field, comprising: two-way high-voltage power supply, the output of two-way high-voltage power supply is connected with bipolar high-voltage electrode assembly by high-voltage wire harness, and is used to output the positive and negative direct-current high-voltage pulse with amplitude ±10kV~±50kV, frequency is 5Hz~20Hz;Infrared imaging monitoring module, the infrared imaging monitoring module is installed on the holder support, and the infrared imaging monitoring module can be driven by holder support to carry out full coverage real-time imaging to the soil of embedded electrode area;The application captures the soil discharge thermal characteristics in real time by infrared imaging, determines the over-discharge and electric field blind area condition in combination with the repair method of the application, and adjusts the repair device parameters in combination with the determination condition, breaks through the limitation of traditional technology static setting, offline detection, forms closed-loop control system, effectively avoids over-discharge and electric field blind area problem, and improves repair uniformity and effect.

The invention relates to the technical field of soil pollution treatment, in particular to a soil pollution treatment method and system, and the system comprises a treatment module which is used for treating polluted soil; the detection module is connected with the treatment module and comprises a pollutant concentration sensor for detecting the pollutant concentration of the soil; the flow guide adjusting module is connected with the treatment module and the detection module and used for determining the directional flow guide intensity of underground water according to the maximum difference quantity of the concentrations of the soil pollutants at equal intervals and equal depths; the putting adjustment module is connected with the treatment module, the detection module and the flow guide adjustment module and used for determining the putting concentration of the microbial nutrient according to the evaporation rate of the water in the soil within unit time; and the gas-water ratio adjusting module is used for determining the gas-water ratio of the soil pores according to the medicament concentration in the underground water. According to the invention, the treatment stability of soil pollution is improved.

The present application belongs to the technical field of water body base soil pollution remediation, and particularly relates to a water body base soil in-situ remediation device pretreatment module. The technical scheme is as follows: a water body base soil in-situ remediation device pretreatment module, comprising a pretreatment box body, a lower layer liquid inlet mixing chamber and an upper layer ultraviolet reaction chamber are arranged in the pretreatment box body; a liquid inlet module is installed on the lower layer liquid inlet mixing chamber, an ozone aeration pipe, an oxidant solution diffusion pipe and an air aeration pipe are installed in the lower layer liquid inlet mixing chamber; a water distribution structure for conveying water in the lower layer liquid inlet mixing chamber to the upper layer ultraviolet reaction chamber is installed between the lower layer liquid inlet mixing chamber and the upper layer ultraviolet reaction chamber, an ultraviolet excitation device is installed in the upper layer ultraviolet reaction chamber, and a pretreatment water outlet hole is arranged on the upper layer ultraviolet reaction chamber. The present application provides a water body base soil in-situ remediation device pretreatment module.

The invention relates to a biochar-loaded nano zero-valent iron repair material as well as a preparation method and application thereof. The biochar loaded nano zero-valent iron repair material is prepared from a persulfate-biochar carrier and metal sulfide modified composite acid stabilized nano zero-valent iron sol, the composite acid is composed of gallic acid and humic acid / fulvic acid; the preparation method comprises the following steps: S1, preparing a persulfate-biochar carrier; and S2, preparing the biochar loaded nano zero-valent iron repair material. The method is applied to groundwater chlorohydrocarbon pollution remediation. According to the method, in the reductive dechlorination process of the nano zero-valent reduced iron, released Fe < 2 + > can strengthen persulfate, Fe < 2 + > is regenerated by utilizing the reduction effect of gallic acid on reacted Fe < 3 + >, and catalytic circulation of iron is maintained; humic acid / fulvic acid is used for efficiently driving the degradation process; and metal sulfide is utilized to catalyze reduction of organic chlorine chemicals, so that the reductive dechlorination performance of the nano-iron material is improved, and the repairing effect of chlorinated hydrocarbon is optimized.

This utility model belongs to the field of soil pollution leaching, specifically a leaching device for soil pollution remediation. It includes a leaching apparatus with a double crushing mechanism at the top. The double crushing mechanism includes a holding shell, the bottom of which is fixedly connected to the top of the leaching apparatus, and a support plate fixedly connected to one side of the holding shell. This utility model uses a motor to drive a first synchronous wheel and a crushing roller to rotate. The crushing roller rotates and pounds the soil, crushing larger stones to prevent them from clogging the feed inlet and reducing leaching efficiency. The rotation of the first synchronous wheel drives a synchronous belt, which in turn drives a second synchronous wheel and a gear to rotate. The gear's rotation drives another gear to rotate relative to it, which in turn drives two crushing rollers to rotate relative to each other, further crushing the stones in the soil and improving the subsequent leaching efficiency.