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76 results about "Metal contaminated soils" patented technology
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Soil remediation agent for treating heavy metal pollution and production method of soil remediation agent
ActiveCN106190158AReduce heavy metal contentGood pollution effectCalcareous fertilisersAgriculture tools and machinesContinuous croppingSoil heavy metals
The invention belongs to the technical field of soil remediation, and in particular relates to a soil remediation agent for treating heavy metal pollution and a production method of the soil remediation agent. The soil remediation agent consists of the following raw materials in percentage by weight: 35 to 65 percent of active molasses yeast waste water chelate powder, 5 to 20 percent of silicon dioxide, 5 to 15 percent of calcium oxide, 1 to 10 percent of magnesium oxide, 0.3 to 10 percent of ammonium persulfate, 5 to 28 percent of humic acid and derivatives thereof, 0.1 to 15 percent of microcapsule inoculants, 0.1 to 5 percent of a macromolecular water-retaining agent, 0.1 to 5 percent of a heavy metal passivant, 1 to 5 percent of auxiliary agents and 1 to 45 percent of inorganic mixed fertilizer. Compared with the prior art, the soil remediation agent provided by the invention has the advantages that the organic waste liquid of yeast industry serves as one of the main raw material, so the environmental pollution caused by the organic waste liquid is reduced and the cost of the soil remediation agent is reduced; precipitation and biological action are combined, so a good effect of treating the heavy metal pollution is achieved; the main components also comprise organic fertilizer and inorganic fertilizer, so the heavy metal pollution can be effectively treated, production and income of crops are increased, continuous cropping resistance of the crops is achieved, and potential application and popularization values are achieved.
Owner:湖北富来地金润肥业有限公司
Metal contaminated soil remediation device
InactiveCN111034401AFully contactedGuaranteed repair effectSpadesSoil lifting machinesSoil scienceSoil remediation
The invention relates to the technical field of contaminated soil remediation treatment, in particular to a metal contaminated soil remediation device which comprises a movable bottom frame, a soil scarifying part, a soil collecting and conveying mechanism, a soil spraying barrel assembly, a soil block crushing mechanism and a soil spraying mechanism. The metal contaminated soil remediation devicehas the beneficial technical effects that soil blocks and crushed soil can be screened, the crushed soil makes direct contact with a spraying agent and then is discharged, large soil blocks are ground into crushed soil and then make contact with the spraying agent and then are discharged, a spray head conducts rotary spraying, full contact with soil can be performed, and the remediation effect isguaranteed. The soil scarifying part is arranged at one end of the movable bottom frame and is in transmission connection with the movable bottom frame, the soil collecting and conveying mechanism isarranged on the movable bottom frame, one end of the soil collecting and conveying mechanism is located on one side of the soil scarifying part, and the other end of the soil collecting and conveyingmechanism is located above the soil spraying barrel assembly. The soil spraying cylinder assembly is arranged at the other end of the movable bottom frame, and the soil block crushing mechanism is arranged above the soil spraying cylinder assembly.
Owner:于瑞祚
Planting method of jute in heavy-metal contaminated soil
ActiveCN102934580ANormal growth cyclePlateau Hemp YieldPlant protectionSoil scienceSoil heavy metals
The invention discloses a planting method of jute in heavy-metal contaminated soil. The method comprises the following steps of: A, preparing soil and building a field, and applying passivator to reduce activity of heavy metal in the soil; B, selecting a specific jute variety with strong heavy metal contamination resistance, sowing in an enough amount at proper time to guarantee full seedlings; C, determining appropriate close planting, thinning / finally singlings in good time, and reserving enough basic seedlings; and D, intertilling / weeding in time, rationally topdressing / irrigating to culture effective strong plants; E, reinforcing prevention and control of diseases and insect pests to realize high yield of jute. By the jute planting method, the average yields of raw stems in light, medium and heavy contaminated jute fields are respectively 181.0+ / -16.4, 174.9+ / -15.7 and 158.5+ / -15.3kg / mu, which reaches the high-yield level of the jute growing area in South China; and the content of heavy metal in raw jute can be controlled in a range of related standard limit, so that agricultural safety and effective utilization of heavy metal contaminated soil can be realized. The method is simple in technology and practical, and has wide application prospect in broad heavy metal contaminated areas.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
Microbial restoration agent for heavy metal contaminated soil and restoration method
ActiveCN107413841AEasy to trainLow costContaminated soil reclamationOrganic fertilisersRestoration methodBioremediation
The invention belongs to the technical field of soil microbial restoration, and particularly relates to a microbial restoration agent for heavy metal contaminated soil and a restoration method. The restoration method mainly comprises the two steps of preparation of the microbial restoration agent and spraying restoration of the soil. Treatment is conducted on the metal contaminated soil by adopting the microbial restoration agent for the heavy metal contaminated soil and the restoration method, the content of heavy metal in the soil can be rapidly reduced, and the restoration effect is good. The restoration method is simple in operation and low in cost, the restoration method is low in project investment, the dosage of the microbial restoration agent can be adjusted according to practical conditions, when a plurality of metal elements exist in the contaminated soil, treatment can be conducted by mixing and matching different thalli to prepare a microbial restoration agent according to needs. The soil fertility is not damaged and indigenous microorganisms are not harmed when restoration is conducted on the soil by adopting the restoration method, secondary pollution does not exist, the microbial restoration agent and the restoration method are safe and environmentally friendly, and suitable for restoration of a large area of heavy metal contaminated soil, is good in practical application effect, and can be used in a large scale.
Owner:GUANGXI UNIV
Stabilizing restoration method for heavy-metal contaminated soil
InactiveCN105107837AShort processing timeLow costContaminated soil reclamationEdaphicMetal contaminated soils
The invention relates to a stabilizing restoration method for heavy-metal contaminated soil. The method is characterized in that Ca-Al hydrotalcite like compounds are used as restoring agents. The method comprises the specific steps of firstly, soil collecting: selecting contaminated soil samples, collecting and sending the contaminated soil to a laboratory, and detecting the heavy metal concentration and basic physicochemical properties of the contaminated soil; and secondly, stabilization experiment: weighing the contaminated soil, putting the contaminated soil into a 500ml beaker, adding Ca-Al like soil restoration agents of different mass percentages, adding deionized water of the corresponding volume in accordance with 60% of the soil maximum water-holding capacity, stirring the mixture uniformly, stabilizing the mixture under the natural condition, and taking samples on the second day, the seventh day and the fourteenth day after stabilization for leaching experiments. The stabilizing restoration method for heavy-metal contaminated soil has the advantages of being short in treatment time, wide in application range and low in cost.
Owner:JIANGSU LONGCHANG CHEM
Application of Jujun grass on repairing soil with heavy mental cadmium pollution
InactiveCN102941219ATall plantPromote growthContaminated soil reclamationSoil heavy metalsMetal contaminated soils
The invention discloses application of Jujun grass on repairing soil with heavy mental cadmium pollution. The application method comprises the steps of; directly transplanting cultivated pennisetum plant Jujun grass seedlings with the heights of 10-13cm in heavy metal cadmium-polluted soil every spring, wherein the plant spacing is 25cm and the row spacing is 30cm; applying a base fertilizer, wherein the base fertilizer amount per mu is as follows: 10-12kg of pure nitrogen, 7-8kg of phosphorus pentoxide and 7-7.5kg of potassium oxide; watering in the plant cultivation period and topdressing every 60 days due to the demand of growing o f the large Jujun grass in the later period, wherein the watering amount is 7-8.5kg per mu and the topdressing amount is 4-5kg of the pure nitrogen per mu; and after the Jujun grass grows for 100-150 days, harvesting the overground part of the Jujun grass and leaving the root of the Jujun grass for sprouting. The Jujun grass has the characteristic of remarkably enriching the heavy mental cadmium and is capable of effectively utilizing the cadmium-polluted soil while continuously repairing the soil with the heavy mental cadmium pollution permanently at the same time.
Owner:SICHUAN AGRI UNIV +1
Physico-chemical restoration method of copper-cadmium composite contaminated soil
ActiveCN102962247AOvercoming processingOvercoming the drawbacks of heavy metal recyclingContaminated soil reclamationCelluloseSoil science
The invention discloses a physico-chemical restoration method of copper-cadmium composite contaminated soil. Heavy-metal contaminated soil is subjected to physico-chemical restoration by a complex evaporation and absorption enrichment manner. The physico-chemical restoration method comprises concrete restoration steps of: firstly, adding a complex repair reagent to the contaminated soil, then fully ploughing and evenly mixing the soil and adding water; and covering a layer of natural cellulose adsorbing medium and naturally evaporating to dry in an environmental system at 35-45 DEG C after the soil surface is smoothed, thus finishing restoration. By using the method, the removal rates of total Cu and Cd in the soil can be up to over 37% and 56.9% respectively within a relatively short time (8-12 hours), and the removal rates of extractable Cu and Cd of hydrochloric acid in the soil can be up to over 60.7% and 69.4% respectively.
Owner:中科华鲁土壤修复工程有限公司
Remediation method for soil co-contaminated by organic chlorine pesticide-cadmium
InactiveCN106001102AShort repair cycleImprove the efficiency of repair managementContaminated soil reclamationPotassium palmitateSporocytophaga
Owner:SUZHOU FAST INFORMATION TECH CO LTD
Treatment and repair particle and treatment and repair method for multiple heavy metal pollutants of soil
InactiveCN105754605ANot Breaking the Planting HabitDoes not break the PH valueContaminated soil reclamationOrganic fertilisersSoil treatmentMass ratio
The invention discloses a treatment and repair particle for multiple heavy metal pollutants of soil. The treatment and repair particle is mainly formed by mixing an oxide compound medicament and an inorganic cementing material. A treatment and repair method for the multiple heavy metal pollutants of the soil comprises the following concrete steps of (a) mixing the oxide compound medicament and the inorganic cementing material according to the mass ratio of 1:5 to 50; (b) vibrating through a vibrating screen to form particles with the particle size being 5 to 10mm after mixing; (c) sealing and packaging the screened particles through water-soluble capsules, heating the water-soluble capsules to enable the water-soluble capsules to melt and shrink locally, and then cooling to the room temperature. The treatment and repair particle and the treatment and repair method provided by the invention has the efficacy of no toxicity, no residue, no teratogenicity, no mutation, no secondary pollution, and multiple functions. The method provided by the invention is simple and time and labor saving to operate, does not break original planting habits of farmers, is not affected by soil environment, soil desertification, PH value and weather conditions, and is stronger in practicability. The particle and the method balance both economic benefit and environment benefit, and can be fully applied in various heavy metal pollution soil treatment and repair in large scale.
Owner:侯力玮
Biological leaching-biological stabilization combined treatment method for heavy metal polluted soil
InactiveCN109290366AEasy to handleImprove environmental benefitsContaminated soil reclamationWater bathsFiltration
The invention provides a biological leaching-biological stabilization combined treatment method for heavy metal polluted soil. The method comprises the following steps of firstly adding water into theheavy metal contaminated soil to obtain a mud-water mixture, then adding ferrous salt into the mud-water mixture, inoculating an acidophilic thiobacillus bacterium solution for biological leaching, then separating the mud-water mixture subjected to biological forest filtration treatment so as to obtain a leaching solution and sludge; and inoculating a sulfate reducing bacterium solution into theleaching solution and the sludge respectively, and carrying out constant-temperature water bath treatment. The biological leaching-biological stabilization can effectively remove heavy metals Cu, Cr,Pb and the like in the soil, the treatment effect and the environmental benefit are obviously higher than that of a chemical leaching treatment mode, compared with by utilizing the separate biologicalleaching technology and the biological characteristics of the sulfate reducing bacteria, heavy metal polluted bottom mud is treated by utilizing the biological characteristics of the biological leaching combined sulfate reducing bacteria, and low in operation cost, small in secondary pollution and better in treatment effect.
Owner:湖南新九方科技有限公司
Soil conditioner for repairing heavy metal polluted farmland and production method of same
ActiveCN106590673AImprove water retentionImproves soil porosityAgriculture tools and machinesOrganic fertilisersCyclodextrinSoil heavy metals
The invention belongs to the technical field of pollution repairing and relates to a soil conditioner for repairing heavy metal polluted farmland and a production method of same. The soil conditioner includes biochar, minerals and cyclodextrin. The production method includes the steps of: (A) preparation of the biochar: calcining carya cathayensis peel carbon to obtain pyrolyzed biochar and performing high-pressure hydrothermal treatment to the carya cathayensis peel carbon to obtain hydrothermal biochar, and mixing the pyrolyzed biochar and the hydrothermal biochar to obtain the biochar; (B) preparation of the minerals: uniformly diatomite powder and chitosan according to the mass ratio of 3:1 to prepare a diatomite composite; (C) blending: uniformly mixing the pyrolyzed biochar, the hydrothermal biochar, the diatomite composite and sheep manure to prepare the soil repairing agent; and (D) granulation: mixing the soil repairing agent with cyclodextrin and performing granulation to obtain the soil conditioner. The soil conditioner, when being used for rice farmland, is economical and effective, allows in-situ repairing and has no addition of chemical substances.
Owner:ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method for maintaining in-situ chemical improvement effect for acidic multi-metal contaminated soil
InactiveCN105903756AEffective maintenance of action and effectMaintenance and effectContaminated soil reclamationMetal contaminated soilsMetal contamination
The invention belongs to the technical field of improvement and restoration of heavy metal contaminated soil and discloses a method for in-situ restoring acidic multi-metal contaminated farmland soil by the utilization of a soil improvement agent and for maintaining soil improvement effect by the utilization of a calcium magnesium phosphate fertilizer during the restoring period. The method of the invention comprises the following specific steps: (1) crushing raw materials in the mixed improvement agent, sieving to prepare agricultural-grade powder, separately storing, uniformly mixing before application, and uniformly mixing the uniformly-mixed improvement agent and surface soil of 15 cm deep; and (2) applying the calcium magnesium phosphate fertilizer after the soil improvement agent has been applied for 300-540 d, and uniformly and fully mixing with the surface soil of 15 cm deep. According to the invention, action effects of the improvement agent are maintained by later application of the calcium magnesium phosphate fertilizer. In addition, sources of raw materials are wide, cost is low, and the method is simple and feasible and is suitable for large-area of farmland soil slightly and moderately contaminated with cadmium, lead, copper and zinc.
Owner:SOUTH CHINA AGRI UNIV
Method for restoring soil polluted by heavy metal through combination of magnetotactic bacteria and plants
ActiveCN105127196APromote growthToleratedContaminated soil reclamationSoil mixingMetal contaminated soils
The invention provides a method for restoring soil polluted by heavy metal through a combination of magnetotactic bacteria and plants. The magnetotactic bacteria and the soil polluted by the heavy metal are mixed and irrigated, and magnetic fields are arranged on the soil polluted by the heavy metal to collect heavy metal polluted soil containing the magnetotactic bacteria, drip washing of the soil polluted by the heave metal is conducted and backfill is conducted; bamboo willows and crimson leafbeet are planted on the soil polluted by the heavy metal at the same time, and the crimson leafbeet is removed after 50-60 days; then crimson leafbeet is planted again, and the crimson leafbeet is removed after 50-60 days; the steps of planting and removal of the crimson leafbeet are repeated; and the bamboo willows and the crimson leafbeet are removed at the same time 1.5-2.5 years later, and the steps are executed circularly and repeatedly until the content of the heavy metal in the soil is up to the safety standard. Compared with the prior art, the magnetotactic bacteria are easy to collect, the growth cycle of the bamboo willows is short and the absorption efficiency of the heavy metal is high. The crimson leafbeet is easy to grow and has a hyperaccumulation ability of cadmium. The method is capable of restoring the soil which is polluted by various heavy metals at the same time, and free of secondary pollution to the soil.
Owner:湖南省和清环境科技有限公司
Compound soil repair agent, preparation method and repairing method thereof
ActiveCN110373199AImprove pore structureImprove adsorption capacityAgriculture tools and machinesContaminated soil reclamationCalcium silicateMass ratio
The invention discloses a compound soil repair agent, a preparation method and a repairing method thereof. The repair agent is composed of a hydroxyapatite-calcium silicate composite material and biochar, the mass ratio of the hydroxyapatite-calcium silicate composite material and the biochar is 4 to 6-9 to 1, and the biochar is poplar base biochar. The preparation method comprises the steps thatdispersion liquid of calcium chloride and dispersion liquid of sodium silicate are correspondingly prepared firstly, then a calcium chloride solution is dropwise added into a sodium silicate solutionunder ultrasonic to react, washing by deionized water and filtering are conducted after reaction is completed, calcium silicate hydrate precipitation is obtained and added into a phosphate solution toreact, the hydroxyapatite-calcium silicate composite material is obtained after filtering, and then the biochar is mixed with the composite material according to the mass ratio to obtain the soil repair agent. According to the compound repair agent, when the ratio of the hydroxyapatite-calcium silicate composite material and the biochar is 4 to 6, mutual promotion between the materials is achieved, the synergistic effect is generated, the long-term and high efficient repair effect can be achieved for heavy composite metal contaminated soil, the cost is low, the using amount is small, and environmental protection is achieved.
Owner:HUNAN UNIV
Treatment method for heavy metal contaminated soil
InactiveCN104259191ALow priceReduce heavy metal contentContaminated soil reclamationSoil treatmentPollution soil
The invention discloses a treatment method for heavy metal contaminated soil, relating to the technical field of contaminated soil recovery. The treatment method comprises the following steps: (A) crushing to-be-treated contaminated soil; and (B) scattering a powder agent in a heavy mental soil treatment agent into the to-be-treated contaminated soil in the step (A), and spraying a water agent in the heavy mental soil treatment agent until the soil is drenched after the crushed soil and the powder agent is mixed uniformly, wherein the weight ratio of the applied heavy mental soil treatment agent to the contaminated soil is 1 to (5-6). The heavy metal contaminated soil is treated by virtue of the treatment method, so that the content of heavy metal in the soil can be rapidly decreased, the soil structure is changed, and the propagation of microorganisms is increased.
Owner:GUANGXI SOURCE OF THE FERTILIZER IND
Method for in-situ repair of heavy metal Pb and As-polluted soil
InactiveCN106140803ARaw materials are cheap and easy to getRepair suitableSuperphosphatesCalcareous fertilisersPhosphateSoil heavy metals
The invention relates to a method for in-situ repair of heavy metal Pb and As-polluted soil, and belongs to the technical field of heavy metal-polluted soil repair. The method uses monoammonium phosphate, diammonium phosphate, calcium superphosphate, polyaluminum ferric chloride, polyaluminium ferric sulfate, ferrous chloride and calcium oxide as raw materials; and the raw materials are fully smashed and mixed by a ball mill to obtain a soil heavy metal repair curing agent. The raw materials for synthesizing the curing agent are cheap and easy to obtain; and when the heavy metal Pb and As is cured in situ, such nutrient elements as phosphorus, nitrogen, sulfur and iron are supplied to soil, so that the polluted soil repair is integrated with the fertilization, the repair cost of the heavy metal-polluted soil can be effectively reduced, and the method is suitable for repairing large-range heavy metal-polluted soil.
Owner:ZHENGZHOU UNIV +1
Soil and sediment remediation
ActiveCN107096789ASolvent extractionSpecific water treatment objectivesSediment remediationMetal contaminated soils
The invention relates to soil and sediment remediation. The invention discloses a batch process of remediation of soil and sediment contaminated with toxic metals which is selected from the group consisting of Pb, Zn, Cd, Cu, Hg, Ni, Mo, Tl, Cr, U, Cs and Sr. In the method, apart from alkaline sedimentation of toxic metal hydroxide, toxic metals are removed from process solutions through alkaline adsorption of a polysaccharide adsorbent. Through application of alkaline adsorption, the efficiency of toxic metal removal from process solutions and alkaline and acidic recycling of chelating agent, i.e., EDTA, is significantly improved
Owner:ENVIT ENVIRONMENTAL TECH & ENG
Phosphogypsum soil conditioner and preparation method thereof
ActiveCN113355099AReduce soluble heavy metal ionsFully contactedBio-organic fraction processingOther chemical processesPhosphogypsumEdaphic
The invention provides a phosphogypsum soil conditioner and a preparation method thereof, which are used for improving soil polluted by heavy metals, and belong to the field of soil conditioners. The phosphogypsum soil conditioner is prepared by taking phosphogypsum treated by active microorganisms as a carrier and adding modified activated carbon and an adsorbent for blending. The mass of the phosphogypsum accounts for 40-60% of the total mass of the conditioner; the mass ratio of the modified activated carbon to the phosphogypsum is 1: (3-5); and the balance is the adsorbent. The soil conditioner disclosed by the invention is rich in minerals, contains various fermentation active matters, and can be used for remarkably improving the activity of microorganisms in soil so as to improve the activity of phosphatase, so that the remediation capability of the soil is improved, an elastic mechanism of the soil for heavy metal sedimentation is formed, and the treatment effect on the heavy metal contaminated soil is remarkably improved.
Owner:贵州星硕铭越环保科技有限公司
Heavy metal contaminated soil restoration agent
InactiveCN107936982AEnhanced Adsorption CapacitySimple structureAgriculture tools and machinesContaminated soil reclamationGrowth plantSodium Bentonite
The invention belongs to the technical field of chemical engineering, and relates to soil contamination restoration agents, in particular to a heavy metal contaminated soil restoration agent. The heavy metal contaminated soil restoration agent is mainly characterized by being prepared from medical stone, bentonite, perlite, diatomite, charcoal, a chelating agent and an appropriate quantity of a plant growth regulator in parts by weight. Field experiments prove that, compared with the prior art, the heavy metal contaminated soil restoration agent has the significant advantages that the comprehensive restoration capacity is sufficient, stable and long-term for various heavy metal contaminated soil, the coverage is enlarged, the pertinence is exact, the restoration agent can supply nourishment nutrition to contaminated soil, regulate plant growth, and quicken improvement and restoration.
Owner:河南宗源环保科技有限公司
Treatment method for contaminated soil
ActiveCN104190702AReduce heavy metal contentImprove adsorption capacityContaminated soil reclamationPollution soilSoil remediation
The invention discloses a treatment method for contaminated soil and relates to the technical field of restoration of the contaminated soil. The treatment method comprises the following steps: A, crushing the contaminated soil to be treated; B, scattering powder in a soil heavy metal treatment agent into the soil to be treated in the step A, uniformly mixing crushed soil with the powder and then spraying water in the soil heavy metal treatment agent into the mixture until the soil is wet through, wherein the weight ratio of the dosed soil heavy metal treatment agent to the contaminated soil is 1:(5-6). The soil contaminated by heavy metal is treated by adopting the method, so the content of the heavy metal in the soil can be quickly reduced, the soil structure is changed, and the breeding of microorganisms is improved.
Owner:GUANGXI SOURCE OF THE FERTILIZER IND
Soil remediation agent and preparation method thereof
ActiveCN111778035AEfficient repairReduce contentAgriculture tools and machinesOrganic fertilisersSoil scienceSoil remediation
The invention discloses a soil remediation agent. The soil remediation agent is prepared from the following raw materials in parts by weight: 20-35 parts of modified diatomite, 10-20 parts of desulfurized gypsum, 8-15 parts of straw, 6-12 parts of fly ash, 4-10 parts of attapulgite, 2-8 parts of trichoderma humic acid and 1-4 parts of modified nano zero-valent iron. The soil remediation agent disclosed by the invention has an efficient remediation effect on soil polluted by organic phosphorus and heavy metals, and the content of the organic phosphorus and the heavy metals in the polluted soilcan be efficiently reduced; according to the modified diatomite disclosed by the invention, the content of organic phosphorus and heavy metals in polluted soil can be efficiently reduced by the modified nano zero-valent iron, and the modified diatomite and the modified nano zero-valent iron have a synergistic effect on the aspect of heavy metal Cd pollution.
Owner:广东大能新材科技有限公司
Restoration method of heavy metal contaminated soil
InactiveCN106623381AEasy to recycleEasy to operateContaminated soil reclamationLiquid wasteRestoration method
The invention belongs to the technical field of restoration of heavy metal contaminated soil and particularly relates to a restoration method of the heavy metal contaminated soil. The restoration method is characterized by comprising the following steps that firstly, the soil to be processed is crushed so as to be screened conveniently; secondly, the crushed soil is screened through a screening device so that soil meeting the pore diameter requirement can be left for restoration; thirdly, an IDS eluting agent is prepared, specifically, the concentration of the IDS eluting agent is 7-11 mmol / L; fourthly, the soil obtained through screening is eluted with the IDS eluting agent; fifthly, filter pressing is carried out so that the eluted soil can be separated from waste fluid; and sixthly, the IDS eluting agent in the waste fluid obtained through separation is recycled, and the soil subjected to filter pressing is cleaned. The method is mainly applicable to restoration of soil contaminated by the heavy metal such as Cd, Cu and Pb, and is simple, easy to implement, short in cycle and remarkable in treating effect; and besides, the solution is easy to recycle and reuse, so that cost is low.
Owner:GUANGDONG POLYTECHNIC NORMAL UNIV
Passivation agent for cadmium polluted alkalescent soil and restoration method
InactiveCN109233866APassivation repair effect is goodReduce the effective Cd concentrationAgriculture tools and machinesContaminated soil reclamationMedicineRestoration method
Owner:JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
Attapulgite-based technique for in-situ remediation of heavy-metal contaminated soil
InactiveCN101780468BEffectively fixedInhibit migrationContaminated soil reclamationSoil scienceIn situ remediation
The invention discloses an attapulgite-based technique for the remediation of heavy-metal contaminated soil. The technique comprises the following steps: adding attapulgite with the ratio thereof being lower than or equal to 8% and the particle size thereof being 100 meshes to the heavy-metal contaminated soil; and mixing. The technique can effectively fix various heavy metals, particularly Cu, Zn and Cd, in the soil, prevent the heavy metals from being migrated into plants from the soil and fundamentally prevent the heavy metals from entering the food chain; the technique of the invention has the advantages of simple operation and low soil management cost, avoids the secondary pollution and is capable of reducing the pollution level and reducing the absorption of heavy metals into plantswithin a short time. Therefore, the technique constitutes a safe and effective method for the remediation of heavy-metal contaminated soil.
Owner:INST OF SOIL SCI CHINESE ACAD OF SCI
A microbial remediation method for heavy metal contaminated soil
ActiveCN107413841BEasy to trainLow costContaminated soil reclamationOrganic fertilisersSoil sciencePollution soil
Owner:GUANGXI UNIV
Novel Pcr family genes which confer tolerance to heavy metals
ActiveUS20060230468A1Improve toleranceAccelerate the accumulation processSugar derivativesOther foreign material introduction processesBiotechnologyMetal contaminated soils
The present invention relates to novel Pcr family genes which confer tolerance to heavy metals to organisms. More particularly, the present invention relates to novel Pcr family genes which confer tolerance to cadmium. Organisms transformed with any of the Pcr genes thereby have improved resistance to and increased level of toxic materials. Soil and water contaminated with heavy metals can be cleaned in an environment-friendly and economical manner by growing the Pcr-transformed organism, especially a plant transformed with the Pcr gene.
Owner:POHANG IRON & STEEL CO LTD +1
Application of leucaena glauca in reparation of soil polluted by heavy metal cadmium
InactiveCN102941220AAdjustable moistureImprove fertilityContaminated soil reclamationSoil heavy metalsMetal contaminated soils
The invention discloses application of leucaena glauca in reparation of soil polluted by heavy metal cadmium. Leucaena glauca seedlings belonging to cultivated leucaena glauca are directly transplanted into the soil polluted by cadmium heavy metal in the middle of May every year, wherein the seedlings are 6 to 9cm high, the row spacing is 20cm, the line spacing is 25cm, 22 seedlings are planted every square meter; before transplanting, base fertilizer, comprising 10 to 12kg of pure nitrogen, 7 to 8kg of phosphorus pentoxide and 8 to 9kg of potassium oxide, is applied per mu; and then the base fertilizer is covered with thin soil which is about 1cm thick; after the seedlings grow for 60 days, topdressing is carried out, to be specific, 3kg of pure nitrogen is applied per mu; in a plant cultivation stage, the water irrigation amount per mu is 6 to 8m<3>; and the leucaena glauca is harvested once or twice one year. By using the enrichment characteristic of the leucaena glauca to cadmium, the soil polluted by cadmium can be repaired for a long time by the leucaena glauca; the root and secreted nitrogen-fixing bacteria of leucaena glauca also can be used for regulating water in soil and conserving nitrogen in the soil; diffusion of pollutants and water and soil loss can be prevented; and the fertility of the soil can be improved.
Owner:SICHUAN AGRI UNIV +1
Soil conditioner prepared from solid waste as well as preparation method and application of soil conditioner
ActiveCN111560251AHarm reductionReduce riskAgriculture tools and machinesTransportation and packagingAluminateSludge
The invention belongs to the technical field of soil conditioners, and particularly relates to a soil conditioner prepared from solid waste as well as a preparation method and application of the soilconditioner. The soil conditioner is prepared from granite stone powder, marble stone powder, sludge and auxiliaries. The preparation method comprises the following steps: crushing raw materials of granite, marble and sludge into fine powder, mixing granite stone powder, marble stone powder, sludge powder and auxiliaries, adding water, uniformly stirring, drying slurry after the slurry is formed,and carrying out high-temperature thermal activation, cooling and drying on the obtained mixture to obtain the soil conditioner product. The waste stone material contains silicon oxide, aluminum oxide, iron oxide, calcium oxide and other components, the sludge is rich in P2O5, potassium oxide, magnesium oxide and other components, aluminosilicate and other crystals containing few lattice defects are obtained through heat treatment of the components, the specific surface area of the material is increased, a microporous structure is formed on the surface, and therefore the effect of conditioningheavy metal contaminated soil is achieved.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Soil conditioner for treating heavy metal pollution of cultivated land and preparation method thereof
InactiveCN113444529ASimple structureImprove fertilityCalcareous fertilisersAgriculture tools and machinesSilicic acidMetal contaminated soils
The invention discloses a soil conditioner for treating heavy metal pollution of cultivated land, and relates to the technical field of soil conditioners. The soil conditioner is prepared from the following raw materials in percentage: 25 to 30 percent of plant ash, 4 to 6 percent of calcium magnesium phosphate fertilizer, 4 to 6 percent of quick lime, 15 to 18 percent of zeolite, 2 to 4 percent of hydroxyapatite, 20 to 22 percent of organic fertilizer, 3 to 5 percent of composite algae powder, 10 to 13 percent of humic acid resin, 5 to 8 percent of sodium-based modified bentonite, 1 to 2 percent of magnesium silicate and 3 to 4 percent of potassium sulfoselenide. The soil conditioner comprises, by weight, 1-2% of nano zero-valent iron and 2-3% of modified molybdenum disulfide, the sum of the content percentages of all the parts is 100%, and the soil conditioner is quick, efficient and safe in heavy metal polluted farmland remediation and can be widely applied.
Owner:GUANGZHOU XINNONGKE FERTILIZER SCI & TECH
Soil remediation agent capable of passivating heavy metals in soil and preparation method for soil remediation agent
InactiveCN110746976AReduce repair costsEasy to operateContaminated soil reclamationOrganic fertilisersSoil scienceSoil remediation
The invention discloses a soil remediation agent capable of passivating heavy metals in soil and a preparation method for the soil remediation agent. According to the soil remediation agent and the preparation method therefor, the soil remediation agent with an efficient remediation action on the heavy metals in the soil is obtained through blending biochar, bentonite and magnesium oxide accordingto a specific dosage ratio, the three ingredients have a synergistic passivating effect on the heavy metals in the soil through being combined together at the specific ratio, particularly, the effective-state content of heavy-metal cadmium in the soil can be efficiently lowered, and the content of effective-state cadmium can be lowered by 55% to 60% in one month. Through remedying heavy-metal contaminated soil by employing the soil remediation agent disclosed by the invention, the soil remediation agent has the advantages that the remediation cost is low, the operation is simple, the maintenance is convenient, and the like.
Owner:BEIJING QIANJING LANDSCAPE CO LTD
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