27 results about "Electrokinetic remediation" patented technology

The application discloses a new device for pre-acidification process combined with cathode buffer zone electric dynamic remediation of heavy metal contaminated soil and a construction method, and belongs to the field of electric dynamic remediation of heavy metal contaminated soil. The device comprises a soil remediation chamber and a sewage treatment chamber. The soil remediation chamber is open at the top, is provided with an anode plate on one side, and is provided with a cathode plate on the opposite side. Filter paper is attached to the two sides of the anode plate and the cathode plate. The cathode plate is further provided with a cathode buffer chamber opposite the anode plate. The anode plate and the cathode plate are connected through wires, a power supply and a sensor. The soil remediation chamber is connected with the sewage treatment chamber on the side provided with the cathode plate, and a gap is formed between the soil remediation chamber and the sewage treatment chamber to allow liquid to flow from the soil remediation chamber into the sewage treatment chamber. The sewage treatment chamber is provided with adsorption material. The sewage treatment chamber is provided with a drainage hole and a drainage pipe at the bottom end. The method can effectively remove heavy metals in sewage and can avoid the possibility of secondary pollution of the environment caused by electric dynamic remediation of sewage.

The application belongs to the field of soil heavy metal remediation, and particularly relates to a carbon cloth supported polypyrrole / graphene oxide / zinc oxide auxiliary electrode for soil remediation and a preparation method thereof. A PPy / GO / ZnO ternary composite cluster 3D network structure material is prepared first; then the carbon cloth is soaked in a PPy / GO / ZnO ternary composite cluster 3D network structure material suspension, and is put into a reaction kettle to react to obtain an auxiliary electrode, which is put into a traditional electromotive remediation system to remediate various heavy metal contaminated soils by electrification. The addition of the auxiliary electrode can reduce the ion migration resistance in the soil system, improve the system current, accelerate the migration speed of heavy metal ions in the electromotive remediation system, make the electric field distribution more uniform, and produce a greater potential difference. Compared with the traditional electromotive remediation, the remediation efficiency is increased by 21% to 35%. The maximum removal rate of Pb, Cr, Cd, Cu and Ni reaches 57% to 90%.

The present application relates to a kind of microbial combined electric repair method for removing soil Cd, using electric repair contaminated soil device, the device includes soil chamber, anode chamber and cathode chamber at both ends of soil chamber, anode chamber and cathode chamber are equipped with anode plate, cathode plate respectively, direct current stabilized power supply is equipped between anode plate and cathode plate, soil chamber is equipped with solid-liquid separation baffle between anode chamber and cathode chamber, including the following steps: S1, fill Cd contaminated soil in soil chamber, add electrolyte solution to Cd contaminated soil, cover soil upper surface, soak 20-30h;S2, add organic acid buffer solution to cathode chamber;S3, input direct current;S4, filamentous fungi are inoculated in soil close to cathode region, repair 7-9d;S5, remove filamentous fungi from soil, complete the repair of contaminated soil.The present application makes Cd in soil migrate to soil close to cathode region, filamentous fungi enrich heavy metal Cd, after removing filamentous fungi, make soil Cd concentration reach farmland soil standard.

The invention discloses a three-dimensional electrokinetic remediation device and application thereof. The device is of a box type structure; the electrokinetic remediation electrolytic tanks are arranged at the two ends of the device, and electrodes and an electrolyte solution are arranged in the electrokinetic remediation electrolytic tanks; the cathode, the anode and the auxiliary electrolyte cavity are arranged between the electrokinetic remediation electrolytic tanks, and the soil column pipe and the auxiliary electrolyte cavity are MnFe2O4 coated GBC; the solute in the electrolyte solution is chitosan salt, Tween X-100 and hydrogen peroxide. The problems that existing biochar only serves as a passive cathode and lacks catalytic sites, and a two-dimensional electrode structure is uneven in electric field distribution and difficult to recycle are solved, MnFe2O4-coated GBC serves as an auxiliary electrode, a three-dimensional electrode structure is constructed, and a customized composite electrolyte is combined, so that the migration ability of pollutants is enhanced, and the service life of the pollutants is prolonged. Fenton-like degradation of organic chlorine pollutants can be promoted, and the remediation efficiency and the treatment uniformity are remarkably improved.

The present application relates to soil remediation and improvement technical field, especially to a kind of method for soil fertility recovery after soil electrokinetic remediation and application thereof, comprising the following steps: soil basic parameter detection: the soil after electrokinetic remediation is zoned, and the pH value, alkali-dissolving nitrogen, available phosphorus, available potassium content and moisture content of each region soil are detected respectively;pH precision regulation: according to the pH value of each regional soil, pH is adjusted using differential reagent, to reach the suitable growth interval of crops;Quasi-nutrient supplement: based on the nutrient deficiency amount of detection analysis, combined with the nutrient amount brought in during pH adjustment process, calculate and supplement nitrogen, phosphorus and potassium fertilizer;Add soil conditioner to soil, mix evenly after ploughing, adjust soil moisture content, cover film maintenance, complete soil fertility recovery.The present application effectively solves the problem that traditional technology cannot zoned differential regulation of electrokinetic remediation soil acid and alkali, pH adjustment, nutrient supplement and structure improvement cannot be synchronized, fertility recovery is slow, and farmland reclamation is lagging behind.

The invention belongs to the technical field of water treatment, and discloses a plant coupling electrokinetic remediation and auxiliary agent in-situ treatment system for coastal shallow water type lake and reservoir bottom mud. Comprising a phytoremediation unit, an electrokinetic remediation unit, a feeding unit and an auxiliary unit. Through establishment of an aquatic plant-electrokinetic remediation-medicament-assisted bottom mud in-situ treatment technology integration system and a prediction model capable of guiding application of the technology integration system, an innovative solution which gives consideration to environmental protection, economical efficiency and applicability is provided for treatment of coastal shallow water type lake and reservoir bottom mud endogenous pollution.

The application discloses a method for simultaneously repairing organic contaminated soil and underground water by electric coupling and multi-phase extraction. Cathode and anode wells are arranged in the area to be repaired in a staggered manner, electrolyte-filled tubes are inserted into the cathode and anode wells, an extraction tube is inserted into the cathode well, the electrodes are connected to an electric repair system, and the extraction tube is connected to a multi-phase extraction system. Through the electric repair, persulfate anions in the cathode electrolyte are injected into the stratum from the cathode well, and are migrated to the anode through the electromigration effect. Iron ions released from the sacrificial anode in the anode electrolyte are migrated to the cathode through the electromigration and electrodialysis effects. In the "opposite" migration, the persulfate in the soil and underground water is activated. Then, the electric field direction is switched, and electrolyte is added into the corresponding electrode wells to perform the "opposite" migration. The repair is performed according to the above electrode repair and electrode repair with the electrode direction switched. The application can realize the simultaneous and efficient repair and detoxification of the composite organic contaminated soil and underground water.

The present application belongs to the field of electrokinetic remediation of heavy metal contaminated soil, and particularly relates to a method for in-situ electrokinetic remediation of heavy metal contaminated soil. Specifically, a hollow functional material with an inner cavity is pre-embedded in the middle transition zone of the contaminated soil area to be treated; a direct current electric field is applied to both ends of the contaminated soil area to be treated, which drives the migration of heavy metal ions in the initial anode region to the middle transition zone, promotes the aggregation of colloids in the zone, compresses the soil pores, and forms an ion bypass channel with the inner cavity of the hollow functional material; when the physicochemical characteristics of the middle transition zone reach the threshold condition, the polarity of the electrodes at both ends of the contaminated soil area to be treated is switched; the reverse electric field promotes the migration of heavy metal ions in the initial cathode direction to the bypass channel formed above, and in-situ enrichment and stable remediation are realized with the counter-migrating stabilized ions in the bypass channel. The method breaks through the mass transfer limitation of traditional electrokinetic remediation, and realizes efficient spatial enrichment and synchronous stabilization of heavy metals.

The application relates to the technical field of soil remediation, in particular to a Fe3O4-CNT / MgO-ATP / SA electrode material and application thereof. The conventional auxiliary electrode used in the electrokinetic remediation technology has poor mechanical performance and poor removal effect on heavy metal ions in the soil. In view of the above problems, the application provides a Fe3O4-CNT / MgO-ATP / SA electrode material, which is obtained by encapsulating modified MgO attapulgite rod soil and Fe3O4 magnetized carbon nanotubes in a crosslinked network structure formed by sodium alginate to obtain an auxiliary electrode material. The obtained auxiliary electrode material has good conductivity, environmental protection and corrosion resistance. The MgO-ATP in the auxiliary electrode material has good adsorption capacity for heavy metal ions. The Fe3O4-CNT endows the auxiliary electrode material with excellent conductivity. The crosslinked network structure of the auxiliary electrode material has good mechanical strength and stability.

The utility model belongs to the technical field of river and lake bottom mud remediation, and discloses a heavy metal polluted bottom mud in-situ electric remediation device which comprises a double-layer isolation cover, the cathode module is arranged at one end of the bottom of the double-layer isolation cover and comprises a cathode protection cover, the interior of the cathode protection cover is divided into a first cavity and a second cavity through a partition plate with holes, a cation exchange membrane and a cathode electrode are arranged in the first cavity, and a heavy metal adsorption material is arranged in the second cavity; the cathode module is arranged at the other end of the bottom of the double-layer isolation cover and comprises an anode protection cover, and an anode electrode is arranged in the anode protection cover; the cathode protection cover and the anode protection cover are made of insulating hard materials with holes, and the anode electrode and the cathode electrode are connected with a power source through waterproof wires respectively. And the electrolyte supply device is used for conveying acidic electrolyte to the cathode protection cover. The in-situ electrokinetic remediation device for the heavy metal polluted bottom mud is good in remediation effect.

This invention belongs to the field of electrokinetic remediation of heavy metals in soil, specifically relating to a method for preparing and applying an auxiliary electrode made of PANI@monolayer graphene oxide / MWCNT material. This invention functionalizes two carbon materials by acid treatment with hydrochloric acid, and then synthesizes polyaniline from aniline and loads it onto the polyaniline to form the auxiliary electrode. The carbon materials are monolayer graphene oxide and MWCNT (multi-walled carbon nanotubes). Under the synergistic effect of the acid-modified monolayer graphene oxide, MWCNT, and PANI, the auxiliary electrode exhibits higher structural stability and superior electrochemical properties, resulting in a longer high-stability time for electrokinetic remediation. The auxiliary electrode prepared using this method has significant advantages in terms of shape and conductivity.

The invention relates to the technical field of ecological restoration equipment, in particular to an electrode-adjustable heavy metal contaminated soil leaching restoration device which comprises a leaching bin, a supporting pad is arranged at the bottom of the leaching bin, guide-in pipes are arranged on the two sides of the leaching bin, a partition plate is arranged in the leaching bin, and the electrode-adjustable heavy metal contaminated soil leaching restoration device is arranged in the leaching bin by rotating a rotating handle. A handle is rotated to drive an adjusting gear to rotate through an adjusting rod, the adjusting gear drives an adjusting rack to move relatively under the meshing acting force, the adjusting rack drives electrode columns to move relatively under the guiding acting force of a limiting plate, and therefore the distance between the two electrode columns is adjusted, and the problem that when low-permeability polluted soil is subjected to leaching remediation, the electrode columns are damaged is effectively solved. For heavy metal contaminated soil with different permeability, leacheate is difficult to fully permeate into the contaminated soil to influence the overall remediation efficiency, an electric enhanced leaching remediation technology is adopted, the distance between a cathode electrode and an anode electrode is designed to be adjustable, and the synergistic effect between electric remediation and leaching remediation can be effectively improved for heavy metal contaminated soil with different permeability.

The invention discloses a method for electrokinetic remediation of heavy metal Cd in soil through coupling of nitrified humic acid and hydrodynamic force, and belongs to the technical field of soil remediation. According to the method, nitration humic acid is prepared through nitric acid modified humic acid, and the effective state concentration of Cd in soil can be remarkably increased; the method comprises the following steps: injecting nitrified humic acid as an enhancer into polluted soil, activating stable-state Cd, and converting the stable-state Cd into a transferable state; constructing an electrokinetic remediation system comprising a specific electrode combination, and applying a direct-current electric field to drive the directional migration of Cd; the ion transmission environment is optimized by combining a water power circulating device, the pH polarization phenomenon is relieved, and the repairing efficiency is cooperatively improved. Experiments show that the method can enable the Cd removal rate of the anode and the middle area to reach up to 95%, has the advantages of high efficiency, environmental protection, simplicity and convenience in operation, high adaptability and the like, is suitable for remediation of soil in farmland, mining area and the like polluted by medium and high-concentration Cd, and provides a new technical path for heavy metal polluted soil remediation.

The application provides a sand layer heavy metal contaminated soil in-situ electric dynamic remediation device and a remediation method thereof, and relates to the technical field of environmental protection engineering construction. The sand layer heavy metal contaminated soil in-situ electric dynamic remediation device comprises two electrode chambers, at least two liquid control chambers are installed on each electrode chamber, at least two remediation pipes are fixedly installed on the bottom of the at least two liquid control chambers in correspondence, soft clay is filled into the at least two remediation pipes, and the at least two remediation pipes are communicated with the liquid control chambers and the electrode chambers through the soft clay. Based on the low permeability of the contaminated soft clay, the remediation pipe is used, the pipe opening avoids the sand layer, the electrolyte above the ground and the electrode are used, and the contaminated soil is remediated by applying a direct current electric field.

The invention discloses a system and a method for remediation of heavy metal contaminated soil through combination of leaching and electric power. The system comprises a soil screening device, a leaching device, an electrokinetic remediation device and a solid-liquid separation and recovery device. The method comprises the following steps: carrying out screening treatment on the polluted soil, then leaching and activating, carrying out electrokinetic remediation to directionally migrate and enrich heavy metals, and finally carrying out solid-liquid separation and recycling leacheate. Through organic combination of screening, leaching, electrokinetic remediation and solid-liquid separation, the problems that the remediation effect of high-clay soil is poor and the remediation cost is high are effectively solved, and efficient and economical remediation of the heavy metal contaminated soil is achieved.

The invention relates to an electrokinetic remediation device for soil polluted by perfluorooctanoic acid. An electrode assembly comprises two graphite rods arranged in an anode chamber and a cathode chamber respectively, one end of each graphite rod extends into electrolyte of the anode chamber or the cathode chamber, and the other end of each graphite rod is connected with a power supply assembly through a wire; the isolation assemblies are arranged at the joint of the soil chamber and the anode chamber and the joint of the soil chamber and the cathode chamber; the power supply assembly is a direct-current stabilized power supply and is used for providing stable direct-current voltage for the electrode assembly so as to form an electric field with set intensity in the soil chamber. The invention further relates to a perfluorooctanoic acid contaminated soil electrokinetic remediation method. According to the device and the method, migration of PFOA is promoted through a stable electric field, an isolation assembly prevents soil particles from polluting an electrode and assists electrolyte permeation, and the desorption efficiency of the PFOA is improved in cooperation with sodium cholate; in-situ remediation does not need large-scale earth cutting, cost is reduced, the soil structure and microorganisms are protected, energy consumption is low, secondary pollution is avoided, remediation is efficiently achieved, and ecology and economy are both considered.

This invention belongs to the field of river and lake sediment remediation technology, and discloses an in-situ electric remediation system for river and lake sediments. The system includes an insulated remediation support frame with multiple openings on the walls of its upper and lower horizontal pipe groups; a pair of anode electrode rods inserted into a pair of opposite pipes in the lower horizontal pipe group; a pair of cathode electrode rods inserted into a pair of opposite pipes in the upper horizontal pipe group; the anode and cathode electrode rods are respectively connected to the positive and negative terminals of a power supply via wires; a remediation material package fixed to the upper horizontal pipe group of the insulated remediation support frame; an insulated positioning rod inserted into a vertical pipe for insertion into the remediated sediment; a rigid force transmission sleeve fitted onto the upper section of the insulated positioning rod; and a traction rope assembly, with one end of each traction rope fixed to the upper horizontal pipe group and the other end wound around a pulley and fixed to a rope shaft. The above system has a simple structure and can effectively remediate river and lake sediments contaminated with heavy metals.

The application discloses a kind of electric remediation device and continuous removal system for removing and recovering chromium-contaminated soil, and relates to the technical field of soil electrokinetic remediation, comprising: tank, tank is divided into soil chamber, permeable reaction wall, anode chamber and first cathode chamber by first hollow partition arranged inside tank;First electrode rod is inserted in anode chamber and first cathode chamber;First anion exchange membrane is clamped in the first hollow partition between soil chamber and permeable reaction wall, to prevent trivalent chromium ions from entering soil chamber in reverse;Cation exchange membrane is clamped in the first hollow partition between permeable reaction wall and anode chamber, to make trivalent chromium ions directional migration to first cathode chamber under electric field driving, first anion exchange membrane effectively prevents trivalent chromium ions generated in reduction process from migrating into soil due to electromigration, and further causing secondary pollution;Cation exchange membrane ensures that trivalent chromium ions directional migrate to first cathode chamber under the action of electric field.

The invention provides a distributed autonomous energy supply polluted bottom mud electrochemical coupling repair device and method, and aims to solve the energy limitation of the existing repair technology and realize efficient and comprehensive repair. The device comprises a distributed microbial fuel cell system (comprising a multi-anode module and a floating rotating wheel cathode), an electrokinetic remediation device (comprising a vertical insertion electrode and a power supply module) and an electric energy management system. The multi-anode module is buried in bottom mud in parallel; the cathode floats on the water surface and is in contact with air through the rotating wheel sheet; the electric energy management system charges the electric energy generated by the microbial fuel cell into the electrokinetic remediation power supply module (including solar auxiliary charging). According to the method, efficient removal of bottom mud deep and shallow layer pollutants is achieved through energy collaborative starting (solar energy and microbial fuel cell collaborative energy supply) and three-dimensional repairing operation (vertical microbial degradation and transverse electric migration enrichment are combined). According to the invention, electrochemical coupling and autonomous energy supply are combined, the repairing efficiency is improved, and the energy consumption is reduced.

The utility model discloses an electrode exchange direct current electrodynamics assisted phytoremediation soil, which belongs to the technical field of soil reactors, and comprises a rectangular acrylic mold, the acrylic mold is of a box-shaped structure with an opening at the upper end, and transparent acrylic plates are symmetrically arranged in the acrylic mold left and right. Heavy metal contaminated soil is filled between the transparent acrylic plates, plants are planted in the heavy metal contaminated soil, an electrode is arranged in the heavy metal contaminated soil, and the positive electrode and the negative electrode of the electrode are connected with a power-up device through electric wires; the power-up device is powered on for 8-12 hours every day, and the current direction is changed once before each time of power-on. According to the utility model, heavy metal pollutants are promoted to gather at root systems, and the effect of adsorbing and removing heavy metals in soil by plant rhizomes is improved.

The application discloses a modified multi-walled carbon nanotube anode electrode preparation method for soil electrokinetic remediation, relates to the field of anode preparation in soil electrokinetic remediation technology, and comprises the following steps: preparing a carbon nanotube electrode base material, preparing biochar, preparing a multi-walled carbon nanotube and biochar composite material, preparing an unmodified multi-walled carbon nanotube composite material, preparing an unmodified multi-walled carbon nanotube composite material slurry, preparing a modified multi-walled carbon nanotube electrode material, drying the modified multi-walled carbon nanotube electrode material, preparing a modified multi-walled carbon nanotube electrode material, and placing the modified multi-walled carbon nanotube electrode material into a die casting 10cm*10cm*5cm, dissolving sodium polyacrylate in a 20-layered separate infiltration manner so that the sodium polyacrylate can bond surrounding electrode materials, and forming a square sheet-shaped electrode under the action of pressure. The application uses multi-walled carbon nanotubes and biochar as base materials to prepare an anode electrode, and uses a method of high-temperature loading of chemical formula C6H 11 FeNO7 of ammonium citrate iron to prepare a high-efficiency anode electrode, greatly improves electrocatalytic performance and electrokinetic remediation effect, reduces electrokinetic remediation energy consumption, prolongs electrode service life, and improves heavy metal treatment capacity of contaminated soil.

The invention relates to a system and a method for repairing a complex pollution site containing various rare earth wastes. The remediation method for the complex contaminated site containing the multiple rare earth wastes comprises the steps that the contaminated site is subjected to investigation and waste characteristic analysis, and a remediation area is determined; a plurality of electrodes are inserted into the repairing area to form an electrokinetic repairing electrode array, and an injection head of a medicament injection device is arranged in a gap among the electrodes; arranging a PRB wall at the downstream of the electrokinetic remediation electrode array; an anti-seepage curtain is arranged on the periphery of the repair area; coarse-particle waste residues are separated, and the waste residues are fed into a resource recycling procedure; electrifying the electrokinetic remediation electrode array, injecting a leaching agent through an agent injection system, and keeping electrified operation; regularly detecting the soil sample, adjusting remediation parameters according to a detection result, and stopping remediation when the detection result of the soil sample reaches the standard. According to the method, through the synergistic effect of electric migration strengthening and chemical agent targeted removal, the removal rate of the heavy metal in the rare earth waste is larger than or equal to 90%, and the repair period is shortened by 30%-50% compared with a single technology.

The invention discloses an electric animal and plant synergistic remediation system and method for heavy metal contaminated soil, and relates to the field of heavy metal contaminated soil remediation, the electric animal and plant synergistic remediation system comprises a supporting frame, two mounting shafts are rotationally connected in the supporting frame, and the outer surfaces of the mounting shafts are in transmission connection with a first driving mechanism connected with the supporting frame; according to the electric animal and plant synergistic remediation system and method for the heavy metal contaminated soil, through the synergistic effect of electric remediation, plant remediation and microorganisms, the purification effect of the heavy metal contaminated soil is remarkably improved. The electrokinetic remediation comprises the following steps: electrifying a graphite electrode through a direct-current power supply, and enriching charged heavy metal ions towards an electrode area under the action of electric field force; in phytoremediation, the hyperaccumulator root system secretes organic acids, chelating agents and the like, activates and releases heavy metals to a soil solution, improves the bioavailability of the soil solution, and promotes migration and enrichment of heavy metal ions in cooperation with electrokinetic remediation.

The invention belongs to the field of electric remediation of heavy metal contaminated soil, and particularly relates to an in-situ electric locking-stabilizing remediation method for the heavy metal contaminated soil. The method specifically comprises the steps that a hollow functional material with an inner cavity is pre-buried in a middle transition area of a polluted soil area to be treated; applying a direct-current electric field to two ends of the to-be-treated polluted soil area, driving heavy metal ions in the initial anode area to migrate to the middle transition area, promoting colloid aggregation and soil pore compression in the area, and forming an ion streaming channel by virtue of an inner cavity of the hollow functional material; when the physicochemical characteristics of the middle transition area reach a threshold value condition, electrode polarities at the two ends of the polluted soil area to be treated are switched; and heavy metal in the initial cathode direction is promoted to migrate to the formed streaming channel through a reverse electric field, and in-situ enrichment and stable repair are realized in the streaming channel together with oppositely migrated stable ions. According to the method, mass transfer limitation of traditional electrokinetic remediation is broken through, and efficient spatial enrichment and synchronous stabilization of the heavy metal are achieved.

The application discloses a mobile treatment equipment for electrically repairing heavy metal contaminated soil, which comprises a mobile carrier and an electric repair mechanism arranged on the mobile carrier; the mobile carrier comprises a supporting chassis, and a plurality of groups of caterpillar drive wheels are arranged on the bottom of the supporting chassis; the electric repair mechanism comprises an outer cylinder shell arranged horizontally on the top of the supporting chassis, an inner cylinder shell coaxially arranged in the outer cylinder shell, and an annular channel formed between the inner side wall of the outer cylinder shell and the outer side wall of the inner cylinder shell; a plurality of heavy metal concentration sensors are arranged on the inner side wall of the annular channel; the equipment has high repair performance, can generate a stable and high-strength electric field, and can improve the distribution uniformity of the electric field in the soil, so that the heavy metals in the repair area can be effectively migrated.

1. The name of the design product: electronic device's heavy metal contaminated soil electrokinetic remediation calculation tool graphical user interface. 2. The use of the design product: an electronic device. 3. The design points of the design product: in the graphical user interface. 4. The picture or photo that best shows the design points: front view. 5. The use of the graphical user interface: for heavy metal contaminated soil electrokinetic remediation calculation. 6. The human-computer interaction mode of the graphical user interface: the program runs to appear the front view; click "start calculation" in the front view to enter the interface change state diagram.

The invention relates to the technical field of contaminated soil treatment, and discloses a heavy metal contaminated soil layered treatment device and method, a soil collection mechanism is rotatably arranged at the front end of a moving mechanism, and a soil treatment mechanism is arranged on the moving mechanism; the soil collecting mechanism is used for collecting polluted soil at different depths in a polluted area, and when the soil collecting mechanism rotates from the first position to the second position, the soil collecting mechanism sends the polluted soil into the soil treatment mechanism. Dividing the pollution area into multiple layers of pollution units from top to bottom according to the pollution degree, determining the depth of each layer of pollution unit, and treating the polluted soil in different pollution units in sequence; soil treatment adopts a combined mode of chemical remediation and electrokinetic remediation, the type and dosage of fed chemical agents and the power of an electric field are determined according to the content of heavy metal and organic pollutants in the contaminated soil, targeted treatment parameters can be set according to the pollution conditions of different pollution units, and the method is suitable for layered treatment of the heavy metal contaminated soil.