82 results about "Site Remediations" patented technology

A device operative to detect metal objects. The device includes a transmitter circuit, an upper transmitter coil and a lower transmitter coil operatively connected to the transmitter circuit. A current fed through the upper transmitter coil and the lower transmitter coil generates a field that excites eddy currents in metal objects in the vicinity of the upper transmitter coil and the lower transmitter coil. An upper magnetic field detector and a lower magnetic field detector are operative to sense eddy currents generated in the metal objects. Processor elements operatively connected to the upper magnetic field detector and the lower magnetic field detector collect, store and analyze the eddy currents and thereby determine the likelihood that a metal object has been detected. A navigation system operatively connected to the processor elements controls movement of the device. Transporting elements operatively connected to the navigation system are operative to support the device and permit alteration of a position of the device.

The invention relates to a contaminated site remediation method, in particular to utilization of nanoscale zero-valent iron particles and orthotopic injection of microbial bacteria in a site, namely, a contaminated site remediation technology adopting nanoscale zero-valent iron and a microorganism remediation technology. The method for remedying the contaminated site through combination of the nanoscale zero-valent iron and reducing microorganisms comprises steps as follows: a nanoscale zero-valent iron injection is injected to contaminated soil through an injection well, and the nanoscale zero-valent iron in the injection is coated with an organic polymer coating layer. The method is characterized in that after the nanoscale zero-valent iron injection coated with the organic polymer coating layer is injected and the nanoscale zero-valent iron in the injection is completely oxidized, a reducing bacterium solution is injected into the contaminated soil for microorganism remediation. The organic polymer layer on the surface of the nanoscale zero-valent iron can stop agglomeration of the nanoscale zero-valent iron, can promote growth of indigenous microorganisms and accelerates pollutant degradation. According to the remediation method, the synergistic effect for the nanoscale zero-valent iron remediation technology and the microorganism remediation technology for the contaminated site remediation is realized.

The invention discloses a bioremediation method for arsenic-containing tailings or waste residue. An arsenic-containing tailings dam and a waste residue pile are subjected to quick on-site remediation by artificially transplanted pteris vittata and Chinese silvergrass. The tailings dam and the waste residue pile are flattened, and bulkhead dams and gutters are established; the pteris vittata and Chinese silvergrass are transplanted to the tailings dam and the waste residue pile; in the next year, the tailings dam and the waste residue pile grow normally; and after 2 to 3 years, a stable pteris vittata-Chinese silvergrass dominant plant community can be formed, and 10 kinds of arsenic-resistant plants are naturally settled simultaneously. After the vegetation of the tailings dam and the waste residue pile is recovered, the wind erosion and water erosion are eliminated, and the arsenic content in storm dripping and filtration water of the tailings dam and the waste residue pile is reduced from 5mg / L before remediation to 100 mu g / L.

Processes and methods relating to treating contaminants and collecting desired substances from a zone of interest using subterranean collection and containment barriers. Tubular casings having interlock structures are used to create subterranean barriers for containing and treating buried waste and its effluents. The subterranean barrier includes an effluent collection system. Treatment solutions provided to the zone of interest pass therethrough and are collected by the barrier and treated or recovered, allowing on-site remediation. Barrier components may be used to in the treatment by collecting or removing contaminants or other materials from the zone of interest.

The invention discloses a 3D model simulation method specific to contaminated site remediation. The method comprises the following steps: 1) determining specific pollutants according to site investigation, and performing distribution of testing sites, sampling and analysis in a suspected contaminated area; 2) combining concentration analysis data of the specific pollutants serving as sample data with a geographic position on a GEO (Geographically referenced) sensor array through a computer data acquisition module to form an integrated data file, and uploading the integrated data file to a database; 3) performing reliability and error analysis on integrated data through analytical calculation in order to perfect data, and interpolating discrete sample point data of the integrated data through a conditional simulation method to form continuous surface data; and 4) forming an interactive 3D view to be output by the continuous surface data in conjunction with a 3D visualization technology in order to form a real-time three-dimensional contamination status map. Through adoption of the 3D model simulation method, an advanced sensing technology, a computer technology, a wireless transmission technology and the like are applied to the soil / underground water remediation industry, and meanwhile the remediation efficiency of an in-situ remediation process is increased.

The invention provides a tungsten carbide welding rod and a tungsten carbide welding wire, which comprise a strip-shaped or filate tubular sheath and filler which is filled in the tubular sheath and comprises tungsten carbide powder. The tubular sheath contains over 50 percent of copper element; a welding temperature of the copper tungsten carbide welding rod or the welding wire is lower, so that the tungsten carbide is effectively prevented from being decomposed while overlaying, and wear-resisting property of the tungsten carbide is kept; the tubular sheath contains the copper, and the tungsten carbide is easy to wet, so that the bonding strength of the tungsten carbide and an overlaid base metal is effectively improved, the possibility that the tungsten carbide is fallen off is reduced when an overlaying part is under a using condition, and a wear-resistant part is prevented from becoming invalid; and the tungsten carbide welding rod and the tungsten carbide welding wire are widely applied to overlaying of a wear-resistant surface, particularly on-site remediation.

The invention discloses a preparation method of an ion mineralization blocking agent for heavy metal contaminated soil remediation. The preparation method is characterized in that a crystal mixed compound agent having ultrahigh cation-exchange capacity, specific surface area and adsorption property is prepared by using phosphoric acid, calcium chloride, bentonite and biomass wastes as raw materials through high-temperature baking, the crystal mixed compound agent is compounded with a sulfenyl compound so as to realize the mineralization blocking of heavy metal ions in the soil through the deep synergistic effect of multiple mechanisms such as ion exchange, adsorption, complexation, precipitation and the like, and the purpose of the in-site remediation of heavy metal contaminated soil is achieved. The compound agent prepared by the method is high in active ingredients, wide in application range, small in using amount and low in cost, takes effect quickly and can be used for the efficient in-site remediation of farmlands and other industrial heavy metal contaminated soil.

Oil sands and like host materials are leached with a selected leachant to render pumpable the oil (including heavy oil, bitumen or kerogen and asphaltenes) as leachate. In a preferred embodiment, natural deposits are in situ leached and the leachate recovered and removed for treatment. The leachant is separated and recycled. The leachant is selected to be biodegradable and to not precipate asphaltenes, and to comprise monoterpenes of the formula C10H16. The overall process allows environmentally acceptable resource development and contaminated site remediation.

The invention belongs to the technical field of environment protection, and relates to a remediating technology for chromium-contaminated soil, in particular to a reduction-stabilization two-stage type remediating method for the chromium-contaminated soil. The method sequentially comprises the following steps that (1) after a chromium reducing agent and the chromium-contaminated soil are evenly mixed, the humidity of the soil is adjusted to 20%-40%, chromium in the soil and the chromium reducing agent fully react for 0.5-5 days, and the content of Cr (VI) in the soil is lowered to below 150 mg / kg, namely remediation of the reduction stage is completed; and (2) chromium stabilizing agents are added into the contaminated soil after reduction through the step (1), the chromium stabilizing agents and the soil are evenly mixed, the humidity of the soil is still kept at 20%-40%, and the soil is stabilized for 15-60 days, namely the stabilization stage of the chromium-contaminated soil is completed. By means of the method, the toxicity of the chromium can be lowered, and the total leaching concentration of the chromium in the soil is greatly lowered; the method can be used for ex-site remediation and in-site remediation, and is a rapid and efficient chromium-contaminated soil remediating method.

The invention discloses a foundation pit dewatering and contaminated site remediation coupled foundation pit dewatering cleaning system. The system is used for achieving foundation pit dewatering and contaminated site remediation in the control range site. The control range site comprises a first water-resisting layer (1601), a water containing layer (17) and a second water-resisting layer (1602) from top to bottom; the foundation pit dewatering cleaning system comprises equipment components of a reactive infiltration ditch (5), a foundation pit curtain (2), a pumping well, an observation well (4) and the like; through large-scale water pumping and draining of foundation pit dewatering, the cleaning effect on contaminant in the control range site can be effectively achieved; and compared with the prior art, the foundation pit dewatering and contaminated site remediation coupled foundation pit dewatering cleaning system is strong, foundation pit dewatering and a permeable reactive barrier technology in site remediation are coupled into a whole efficiently, long-term monitoring and maintenance of environment quality of the remediated engineering site can be achieved, secondary pollutions of the site can be remediated again, the total cost of the engineering can be efficiently reduced, and the total period of the engineering is shortened.

The invention belongs to the field of soil treatment, especially to the field of pollution site remediation and more specifically relates to a pollution site remediation obstructing method under a non-excavating manner. According to the pollution site remediation obstructing method under the non-excavating manner, one mucky clay layer in soil is taken as a bottom obstructing layer, by means of themanner that vertical obstructing walls deep into the mucky clay layer are constructed, a pollution site obstructing space with a horizontal obstructing layer and a vertical obstructing layer is formed; and by means of the manners that the mucky clay layer is utilized as the horizontal obstructing layer, and the vertical obstructing walls are established on the periphery of the mucky clay layer, under the precondition of non-excavating and on the basis of a construction project water stopping curtain process, the natural low-permeability mucky clay layer is utilized, obstructing between the periphery and the bottom of a pollution area can be economically and effectively realized, pollutants are effectively intercepted, and the pollutants are prevented from vertical infiltration and horizontal diffusion along with groundwater.

The invention provides a method for managing remedied earthwork volume of a polluted site by combining aerial survey of an unmanned aerial vehicle and BIM technology comprising the following steps: using an unmanned aerial vehicle to carry out data information acquisition on a polluted site, exporting unmanned aerial vehicle data, and in three-dimensional modeling data processing software, outputting point and line data with elevation properties, based on the soil color, the vegetation coverage condition and the position of the waste residue and waste material pile, obtaining an approximate region boundary of the polluted site; collecting soil samples on points near the boundary line to acquire a boundary of an accurate polluted site area importing the data into revit software to generate a three-dimensional original terrain model, and establishing a BIM model; and based on the BIM model, obtaining information data such as excavation work amount, excavation boundary, depth and the like of earthwork, and realizing full-process management and control of a polluted site remediation project. The unmanned aerial vehicle is used for obtaining the panorama of the whole polluted site and generating the three-dimensional live-action model, and the three-dimensional live-action model is combined with the BIM model, so that the manual measurement modeling cost is greatly reduced, the timeliness and authenticity of the polluted site repair construction process are improved, and the requirement of three-dimensional visualization progress comparison is met.

The invention relates to an in-situ enhanced biological ventilation remediation method for a petroleum hydrocarbon contaminated site. The problems that in the prior art, the remediation efficiency islow, the remediation effect is poor, the remediation cost is high, and the application range of an in-situ remediation technology is limited are mainly solved. By the in-situ enhanced biological ventilation remediation method for a petroleum hydrocarbon contaminated site, firstly, a soil layer crack and a sand layer are formed in a soil layer around an injection hoistway of a petroleum hydrocarboncontaminated site by utilizing a hydraulic fracturing technology to increase the permeability coefficient of the contaminated site, further, air or oxygen, a nutrient solution and an exogenous efficient degrading bacterium agent are supplied into the soil and the underground water, and by means of aerobic activity of microorganisms, pollutant degradation is promoted; meanwhile, volatile organic compounds and degradation products are promoted to flow to a gas extraction well through the pressure gradient in soil. The above problems are well solved through the technical scheme of extraction andremoval, and the method can be used for petroleum hydrocarbon contaminated site remediation.

The invention provides a process for remediation of sites contaminated with metals such as former industrial sites and mines. In particular the invention provides a process for site remediation comprising the steps of: (a) adding metal-binding particles to a site containing one or more metal contaminants such that at least some of the one or metal contaminants are sequestered by the particles, and (b) populating the site with plants. The use of the particles of the present invention in association with plants, and microbiota associated with the plant roots can achieve sustainable phytostabilisation of contaminated sites.

The invention relates to an inflatable greenhouse applicable to a contaminated site. The inflatable greenhouse comprises a greenhouse shaped air film, fixing piles are arranged at the edge of the airfilm, a plurality of steel wire ropes are arranged outside the air film, and two ends of any one of the steel wire rope are connected with the corresponding fixing piles. Air inlet equipment is arranged on one side of the greenhouse, and a circulating tail gas discharging system is arranged on the other side of the greenhouse. The lateral side of the greenhouse is provided with access ports, and the circulating tail gas discharging system is connected with a controller. By consideration of harms to physical health of onsite workers and surrounding residents due to proneness of toxic and harmful gases and malodorous gases to volatilization and dispersion into surroundings in a contaminated site treatment process and consideration of particularity of site remediation construction, special utilization of the inflatable greenhouse is provided, the problem of odor dispersion in an excavation and remediation process of the organic contaminated site is effectively solved, smoothness and safety in site remediation are guaranteed, the circulating tail gas discharging system is safe and environmentally friendly, and convenience in use, mounting, demounting and storage and recyclability are realized.

The invention relates to an intelligent management and control platform for remediation operation of contaminated site based on internet of things technology, which comprises a field environment parameter monitoring module; a vehicle and Personnel Positioning Module; a user Login Authentication Module; a personnel and vehicle access management and access control, an automatic weighing equipment module; a security hazard management and mobile phone APP remote monitoring module. The invention combines Internet of things and big data technology, based on intelligent perception and data intelligent analysis, Integrated video surveillance, Environmental parameter monitoring, personnel positioning and tracking, transportation process monitoring, alarm management, network management, big data analysis and other functions, can achieve real-time, intelligent monitoring, so that the contaminated soil safety, controllable, once the situation can be treated quickly, to achieve the contaminated site remediation operation safety control and emergency command of the whole process, omni-directional, all-round situation management. The platform has high practical application value and good prospects.

The invention discloses a biological method used for organic contaminated soil remediation. The biological method comprises the operating steps that first, contaminated soil is crushed and sieved, sothat large stones are removed; second, degradation bacteria and nutritive salt are dissolved in water and then are added into the contaminated soil, the soil moisture content is kept to be 14.3%-25%,and the contents of C, N and P elements in the soil are 5000-10000 mg / kg, 500-1000 mg / kg and 50-100 mg / kg correspondingly; third, the soil is stacked, an aerator pipe with opening holes and a monitoring probe are arranged in the stacking process, the aerator pipe is connected with an air compressor, and air is conveyed to the soil through the aerator pipe; and fourth, the oxygen content, the moisture content and the temperature of the soil are monitored, the soil pH value and the organic pollutant concentration are subjected to sampling and detecting at regular intervals until the target pollutant concentration is lowered to be below the remediation target value, and then remediation is finished. According to the biological method used for organic contaminated soil remediation, the efficient degradation bacteria and nutrient substances are added, the microbial remediation effect is enhanced through a biopile technology, the biological remediation efficiency is improved, and the biological method has the advantages that the cost is low, operation is easy, no secondary pollution occurs, and manpower and equipment investment is reduced; and the biological method can be applied to organic contaminated site remediation at scale.

Processes and methods relating to treating contaminants and collecting desired substances from a zone of interest using subterranean collection and containment barriers. Tubular casings having interlock structures are used to create subterranean barriers for containing and treating buried waste and its effluents. The subterranean barrier includes an effluent collection system. Treatment solutions provided to the zone of interest pass therethrough and are collected by the barrier and treated or recovered, allowing on-site remediation. Barrier components may be used to in the treatment by collecting or removing contaminants or other materials from the zone of interest.

The invention discloses a soil and underground water landfill leachate pollution in-situ remediation simulation device. The device comprises an inlet water tank, a landfill leachate seepage tank, multiple levels of permeable reactive grids, an aquitard, an aquifer and water outlet pipes. A plurality of small holes are provided on the bottom of the landfill leachate seepage tank. Pollution plume blocking boards, perforated walls, sieve boards and a connection pipe are arranged on the multiple levels of permeable reactive grids. A plurality of outlet water pipes are connected to the end of the device. The level number n of the multiple levels of permeable reactive grids is determined according to the physiochemical characteristics of the landfill leachate and according to a remediation target. n is an integer. With the device, the difference between a landfill leachate pollution soil and underground water in-situ remediation laboratory simulation environment and an actual site remediation environment is reduced; the situation of soil and underground water landfill leachate pollution in-situ remediation can be reflected more accurately; and objective theoretical references are provided for project applications of the soil and underground water landfill leachate pollution in-situ remediation technology.

The invention provides a treatment system for organic sewage in a contaminated site remediation process. The treatment system comprises a demulsification oil separation tank, a regulation tank, an advanced oxidation tank, a coagulative precipitation tank and an activated carbon tank; the demulsification oil separation tank is a pretreatment unit, and if the organic sewage contains TPH or NAPL phase pollutants, the organic sewage enters the demulsification oil separation tank and is pretreated; the regulation tank is located at the downstream of the demulsification oil separation tank, and if the organic sewage does not contain TPH or NAPL phase pollutants, the organic sewage directly enters the regulation tank and is treated; the advanced oxidation tank is located at the downstream of theregulating tank, and refractory organic matters in the organic sewage are treated in a targeted manner by using an advanced oxidation method; the coagulative precipitation tank is positioned at the downstream of the advanced oxidation tank and is provided with a coagulation area and a precipitation area; the activated carbon tank is positioned at the downstream of the coagulative precipitation tank and is used for deeply treating the effluent of the coagulative precipitation tank to make the effluent discharged or recycled after reaching standards; and a sludge thickening tank is used for collecting, thickening and outwards transporting or recycling dross and sludge.

The invention discloses a method for restoring DDT and heavy metal chromium combined pollution soil simultaneously, and relates to a method for restoring pollution soil. A combined pollution soil sample is placed into a 250 ml glass bottle, Fe78Si9B13 amorphous alloyed powder is added, then a sodium persulfate solution is added, and mud is formed under the effect that a stirrer rotates 800 rings per minutes; and sampling detection is carried out after reacting is made, a drop of 1 millimoore per liter of tertiary butanol is dropped in to conduct quenching to generate free radicals, and reacting is finished. According to the method, the soil restoration agent Fe78Si9B13 amorphous alloyed powder is prepared; in-situ remediation is carried out on pollution site soil, and different-site remediation is also carried out; the Fe78Si9B13 amorphous alloyed powder has magnetism, and recovery and reutilization can be carried out; and a surface active agent is not added, and therefore secondary pollution on the restored soil can be avoided.

The invention discloses a safe soil on-site remediation integrated device. The invention belongs to the field of soil remediation. The device comprises a moving vehicle, a telescopic rod is arranged at the front end of the moving vehicle, a coulter is mounted at the bottom end of the telescopic rod, a rotating platform is arranged on the moving vehicle, a mechanical excavating arm is arranged on alifting column, an excavator bucket is mounted on the mechanical excavating arm, a treatment box is arranged on the moving vehicle, a partition plate is arranged in the treatment box, a water tank isarranged on the side wall of the treatment box, a water pipe is arranged on the water tank, a spraying disc is arranged at the outlet end of the water pipe, a sterilizing lamp is arranged on the inner wall of the treatment box, a strain adding pipe is arranged at the top end of the treatment box, an air injection tank is installed on the moving vehicle, a rotary drum is arranged in the treatmentbox, and multiple overturning plates are evenly arranged on the outer wall of the rotary drum. Office remediation is directly carried out on site, soil does not need to be dug out and transported, intermediate steps are saved, time and labor are saved, the soil remediation effect and efficiency are improved, harmful substances in soil are conveniently removed, soil remediation is facilitated, safety is improved, and use is convenient.

The invention provides a volatile organic contaminated site remediation system comprising a controllable aeration system, a multiphase extraction system and a pollutant treatment system; the controllable aeration system mainly comprises a plurality of aeration wells, a plurality of aeration heads are arranged in different depth areas in the aeration wells, a floral tube section is arranged at eachaeration head, the aeration heads are communicated to an air compressor on the ground through electromagnetic valves, and the electromagnetic valves are connected with a central control system; the multiphase extraction system comprises multiphase extraction wells arranged in the centers of the plurality of aeration wells. According to the invention, the electromagnetic valves are controlled by the central control system to indirectly control the opening and closing of the aeration heads in the wells, so that the purpose of controlling the aeration depth, the aeration time and the aeration sequence is achieved, organic pollutants in different stratums are subjected to targeted circulating aeration or aeration on a certain underground layer, and pollutants in heterogeneous stratums can betreated; and through combined application of in-situ aeration and multiphase extraction, the purpose of integrally repairing a polluted aeration zone and a water-containing layer in the field is achieved.

The invention provides a contaminated site remediation method and apparatus, and belongs to the technical field of environmental supervision. The method comprises the steps of establishing a contaminated body by adopting a three-dimensional spatial interpolation technology according to a contaminated site monitoring point; calculating remediation values under different monitoring depths, and performing interpolation in a vertical direction on the remediation values under the different monitoring depths to obtain the remediation value of any depth; and according to the contaminated body, the remediation value of any depth and a risk control value, obtaining a target remediation value. According to the scheme, by utilizing three-dimensional spatial interpolation, the contaminated body is established; the continuity of the target remediation value in the vertical direction is considered to obtain a more scientific and accurate target remediation value; and finally the remediation volume is calculated in an integral summation mode. The scheme provides the scientific and accurate target remediation value and remediation volume, thereby efficiently guiding remediation work.

The invention discloses a movable soil pollution on-site remediation device in the technical field of soil pollution remediation. The device includes a base; a feeding device is obliquely arranged onthe left side of the top of the base through a support; a treatment box is arranged on the right side of the top of the base and located on the right side of the feeding device; a material fixing mechanism connected with the feeding device is fixedly arranged on the left side of the top of the treatment box; a repairing cylinder mechanism is movably arranged on the inner wall of the bottom of a repairing cavity; and a detachable purification mechanism is arranged in the middle in the liquid cavity. The soil remediation device is provided with the feeding device, so that the feeding continuityduring soil remediation can be guaranteed, and the working efficiency is improved; meanwhile, a material fixing mechanism is arranged for cooperation, so that equivalent feeding is achieved, a user can flexibly control the soil introduction amount conveniently, blockage caused by excessive soil introduction can be prevented, and the subsequent remediation quality of soil is further improved.

The invention discloses a mobile soil pollution on-site remediation device and a remediation method thereof. A moving crawler belt is arranged at the lower end of the control chamber; the main body rack is connected to the control chamber; a soil splitting mechanism is arranged at the lower end of one side, close to the control chamber, of the main body rack; the repairing tooth rake is fixedly connected to the lower end of the main body rack through the connecting block; the repairing tooth rake is positioned on one side, far away from the control chamber, of the soil splitting mechanism; thefirst soil loosening rake is fixedly mounted at the lower end of the main body rack; the first soil loosening rake is located on the side, away from the soil splitting mechanism, of the repairing tooth rake. The contaminated soil is crushed through the soil splitting wheel, so that the permeation effect of liquid medicine on the soil is guaranteed, the remediation effect is improved, the soil isloosened through the second soil loosening rake, the leveling mechanism rotates to level the soil in a rolling mode, the contaminated soil ground is effectively leveled, and therefore the ground is guaranteed to be flat.

The invention relates to a contaminated site remediation method, in particular to utilization of nanoscale zero-valent iron particles and orthotopic injection of microbial bacteria in a site, namely, a contaminated site remediation technology adopting nanoscale zero-valent iron and a microorganism remediation technology. The method for remedying the contaminated site through combination of the nanoscale zero-valent iron and reducing microorganisms comprises steps as follows: a nanoscale zero-valent iron injection is injected to contaminated soil through an injection well, and the nanoscale zero-valent iron in the injection is coated with an organic polymer coating layer. The method is characterized in that after the nanoscale zero-valent iron injection coated with the organic polymer coating layer is injected and the nanoscale zero-valent iron in the injection is completely oxidized, a reducing bacterium solution is injected into the contaminated soil for microorganism remediation. The organic polymer layer on the surface of the nanoscale zero-valent iron can stop agglomeration of the nanoscale zero-valent iron, can promote growth of indigenous microorganisms and accelerates pollutant degradation. According to the remediation method, the synergistic effect for the nanoscale zero-valent iron remediation technology and the microorganism remediation technology for the contaminated site remediation is realized.

The invention provides a process for remediation of sites contaminated with metals such as former industrial sites and mines. In particular the invention provides a process for site remediation comprising the steps of:(a) adding metal-binding particles to a site containing one or more metal contaminants such that at least some of the one or metal contaminants are sequestered by the particles, and(b) populating the site with plants.The use of the particles of the present invention in association with plants, and microbiota associated with the plant roots can achieve sustainable phytostabilization of contaminated sites.

The invention discloses an in-site remediation method for permanently removing heavy metal in farmland soil. The method comprises the following steps: (1) preparing a porous support material; (2) preparing a modified compound material, namely, (a) weighting the porous support material prepared in step (1) and then adding to a toluene solvent to prepare a porous support material toluene solution; (b) dropwise adding TPDA to the prepared porous support material toluene solution, and then reacting under the temperature of 80 to 120 DEG C so as to obtain an amino modified porous support material; (c) centrifugally separating the prepared amino modified porous support material to obtain a solid, and washing the solid; (d) drying the washed solid in a vacuum drying box which is at the temperature of 60 to 80 DEG C, so as to obtain the modified compound material. The modified compound material is high in absorbing capacity for various kinds of heavy metal and cannot damage the soil; in addition, the physical properties of the soil can be effectively improved, and particularly the water-retaining performance and air breathability of the soil can be improved.

The invention discloses a refined site investigation method based on remediation efficiency. The refined site investigation method comprises the steps of performing site data arrangement and analysis,checking a heavily polluted region, correcting a range of a moderately polluted region, judging whether a lightly polluted region has pollution or not, and making a whole-field pollution partition grading diagram. For a specific soil pollution remediation site, a discrete point distribution sampling method, a density increased point distribution sampling method and an incremental point distribution sampling method are used in a targeted mode, the ranges of heavily, moderately and lightly polluted regions are precisely verified respectively, and finally a full-field-region pollution zoning andgrading graph is constructed in combination with sampling test analysis results. According to the refined site investigation method, precise identification of soil pollution of the contaminated remediation site is achieved, different site investigation methods are adopted for regions with different pollution degrees, the polluted region identification precision is improved, and the site remediation efficiency is improved.