CN111171830A - Passivator for soil heavy metal pollution treatment and preparation method thereof - Google Patents
Passivator for soil heavy metal pollution treatment and preparation method thereof Download PDFInfo
- Publication number
- CN111171830A CN111171830A CN201911308090.XA CN201911308090A CN111171830A CN 111171830 A CN111171830 A CN 111171830A CN 201911308090 A CN201911308090 A CN 201911308090A CN 111171830 A CN111171830 A CN 111171830A
- Authority
- CN
- China
- Prior art keywords
- soil
- parts
- heavy metal
- materials
- passivator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a passivator for treating heavy metal pollution of soil, which comprises, by weight, 10-20 parts of dewatered sludge, 10-15 parts of lime, 15-20 parts of clay minerals, 10-15 parts of straw pomace and 30-40 parts of modified biochar. The passivator for treating the heavy metal pollution of the soil, which is obtained by the invention, is suitable for soil remediation of the heavy metal polluted site. The main components are natural materials, secondary pollution can not be generated, the organic matter content and the cation exchange capacity in the soil can be improved, the soil hardening can be prevented and treated, the soil texture can be effectively improved, the soil porosity can be adjusted, necessary nutrient substances are provided for the survival of microorganisms, the physical and chemical properties of the soil and the microbial flora are improved, and the soil production potential is improved.
Description
Technical Field
The invention relates to soil remediation, in particular to a passivator for soil heavy metal pollution treatment and a preparation method thereof.
Background
In recent years, soil pollution is increasingly serious due to the influence of various factors, such as water pollution, air pollution, transportation, development of ore deposit and the like, a plurality of events related to heavy metal pollution occur in China, including cadmium rice, cadmium wheat, standard exceeding of blood lead and the like, and the heavy metal pollution of the soil becomes an important factor influencing social stability and resident health.
Soil heavy metal pollution does not present harm to the environment within a certain period of time, and when the content of the heavy metal pollution exceeds the bearing capacity or limit of the soil or the environmental condition of the soil changes, the heavy metal can activate the soil to cause serious ecological harm, which is called as 'chemical timing bomb'. In general, heavy metals firstly harm soil microorganisms, the number of microorganisms unsuitable for heavy metals is greatly reduced and even killed, and the microorganisms suitable for heavy metals survive and gradually become soil dominant bacteria. Heavy metals also have a strong poisoning effect on crops growing in soil, and the influence is as follows: on the one hand, heavy metals can damage some tissues and functions of plants, thereby reducing the yield and quality of the plants, for example, when the content of cadmium in soil is too high, the chlorophyll structure of plant leaves can be damaged, and finally the plants die, and when the content of copper and zinc in the soil exceeds a certain limit, the roots of crops can be seriously damaged.
The farmland heavy metal pollution remediation technically aims to remove the total amount, reduce the activity and reduce the food chain risk. At present, the technology adopted by the soil remediation of the heavy metal polluted farmland in China mainly comprises the following steps: engineering restoration, physicochemical stabilization-low absorption crop combined control, agricultural (moisture and the like) regulation and control, plant absorption restoration, chemical leaching restoration, replacement planting, safe utilization and the like.
The physicochemical stabilization (passivation) is one of the most applied restoration methods at the present stage, and has better effect on restoring the farmland soil polluted by large area, medium and low concentration. The method adds one or more passivation materials into the polluted soil, changes the heavy metal form in the soil and reduces the migration and biological effectiveness of the heavy metal through regulating the physical and chemical properties of the soil and a series of reactions such as precipitation, adsorption, complexation, oxidation-reduction and the like, and forms natural minerals which are harmless to the environment and stable for a long time, thereby reducing the absorption of the heavy metals by crops. An excellent soil heavy metal passivator has the characteristics of low investment, high speed, simple operation, no secondary pollution (including to soil environment, water environment and the like), safety, environmental protection and the like, does not harden soil, and does not cause ecological influence on the soil after long-term application.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a passivator for treating soil heavy metal pollution and a preparation method thereof.
In order to achieve the purpose, the passivator for soil heavy metal pollution treatment comprises, by weight, 10-20 parts of dewatered sludge, 10-15 parts of lime, 15-20 parts of clay minerals, 10-15 parts of straw pomace and 30-40 parts of modified biochar, wherein the modified biochar is biochar loaded with nano-hydroxyapatite, and the nano-hydroxyapatite accounts for 2-8% of the modified biochar.
The preparation method of the passivator comprises the following steps:
firstly, sludge dewatering is carried out, namely sludge in a rural sewage treatment system or a septic tank which is qualified in detection is concentrated, the dewatered water content is less than 75%, and the sludge is stacked and naturally dried to obtain dewatered sludge;
secondly, preparing modified biochar, namely removing plastic, metal and bone impurities in wheat straws, rice straws and rice husks, feeding the primarily sorted raw materials into a crusher, crushing the crushed raw materials to obtain a particle size of 2-4cm, piling the uniformly stirred materials into a conical pile, introducing natural wind into the pile to ensure that a small amount of oxygen is contained in the pile and the pile is in a facultative state, maintaining the temperature of the pile at 70-90 ℃, supplementing nutrition and moisture regularly, performing low-temperature pyrolysis carbonization to obtain a biochar crude product, and finally adding 2-8% of hydroxyapatite to obtain the modified biochar;
thirdly, mixing and crushing, namely mixing 10-20 parts of dewatered sludge, 10-15 parts of lime, 15-20 parts of clay mineral, 10-15 parts of straw pomace and 30-40 parts of modified biochar, crushing to obtain particles with the particle size of 1-2 mm;
fourthly, granulating, namely conveying the materials accounting for 30-40% of the total weight of the mixed materials into a disc granulator for granulation, controlling the inclination angle of a turntable of the granulator to be 40-50 degrees, gradually increasing the rotation speed of the granulator, finally controlling the rotation speed to be 55-60r/min, intermittently spraying water, continuously adding the rest materials, gradually growing the spherical cores, and controlling the whole granulation time to be 18-20 min;
and fifthly, adjusting the water content of the granules, sieving, packaging, directly drying the granulated materials in the sun or conveying the granulated materials to a dryer at 70-80 ℃ for drying to enable the water content of the materials to be less than 5.0%, sieving finished products, conveying the dried materials to a screen for sieving, and finally controlling the particle size of the finished products to be 1.0-3.0mm, thus preparing the environment-friendly farmland soil heavy metal passivator.
The implementation mode adopted by the passivator is in-situ or ex-situ stirring and mixing, and an all-in-one machine for soil remediation, a stirring hopper, rotary spraying and a rotary cultivator can be selected according to the characteristics of soil. The adding proportion is 1-10%, and 200-800kg is applied per mu. The heavy metal in the crop seeds can meet the requirements of the standard in the food safety national standard food pollutant limit (GB 2762-2017) by combining effective field planting management while applying.
The lime provided by the invention is most widely applied to the heavy metal remediation of southern acidic soil, and the application of the lime can quickly improve the pH value of the soil, increase the negative charges on the surface of soil particles, promote the adsorption of heavy metal ions and reduce the migration of heavy metals. Heavy metals such as Cd, Pb, Cu and Zn are promoted to be adsorbed by soil or form hydroxide precipitates, and meanwhile, lime has high water solubility, is easy to permeate into soil gaps, and has a good repairing effect. Calcium can have isomorphous substitution effect with cadmium. The quicklime can be used for reducing cadmium concentration in brown rice, spinach, and vegetables (lettuce, Chinese cabbage, cauliflower, etc.). The application of lime can reduce the content of available copper in soil. After the lead-polluted soil is treated by lime, the absorption of the lead by the corn is obviously reduced, and the lead content of the grains can reach the national food sanitation standard. The lime has stable adsorption to chromium (Cr6+) and mercury (Hg2+), and after 6% of lime is applied, 69% of Cr6+ and 63% of Hg2+ can be fixed in soil. Wherein Hg2+ can form hydroxide or carbonate precipitate to fix when the soil pH is more than 6.5.
The clay mineral has surface activity, adsorption, filtration, ion exchange and other properties, and is developed through modification technology. The clay mineral has high dispersity, large specific surface area which can reach 800m2/g, larger gaps among structural unit layers, and interlaminar domain with net negative charge structural performance, is easy to exchange and adsorb with heavy metal ions, and can obviously reduce the water solubility of Pb, Zn and Cd by adding more than 0.5 percent of bentonite. Because the outer layer of the structural unit has hydroxyl, the bonding force connection between unit layers is weaker, and heavy metal ions can enter layers to perform the matching action with the hydroxyl. Therefore, the adsorption of heavy metal by clay mineral is mainly carried out in the form of the coordination of heavy metal ions and hydroxyl, and the adsorption selectivity of heavy metal ions is controlled by the factors of the layer charge distribution of the mineral, the hydration heat, the electrovalence, the ionic radius, the effective ionic radius and the like of the heavy metal ions. Generally, the higher the electrovalence of heavy metal ions, the smaller the radius, and the stronger the adsorption effect with clay minerals.
The wheat straw biochar, the rice straw biochar and the rice hull biochar in the modified biochar can effectively fix Cd and Pb in soil. Mainly changes the pH value of soil, increases the content of organic matters in the soil, changes the synergistic effect of various mechanisms such as the oxidation-reduction condition of the soil and the composition of microbial communities, and the adsorption or fixation mechanism of the biochar to heavy metals mainly comprises the following steps: (1) the pH value of the soil is increased, so that the heavy metal ions are promoted to form insoluble carbonate, phosphate or hydroxide precipitates, or the active sites on the surface of the soil are increased, so that the activity and the mobility of the heavy metal ions are reduced. (2) Ion exchange and cation-pi bond interactions. (3) Precipitation or complexation reaction: the functional group on the surface of the biochar forms a complex with specific metal ions. (4) The straw biochar has non-electrostatic physical adsorption effect on heavy metal ions such As Hg2+, As3+, Pb2+ and Cd2 +. The biochar is modified because part of radicals are lost in the high-temperature cracking process and the biochar is difficult to separate after adsorption, so that the specific surface area of the biochar is improved, surface functional groups (such as carboxyl) are increased, and the fixing capacity of pollutants is improved. The phosphorus-containing material has important practical significance in the in-situ remediation of the heavy metal in the soil. The method has less disturbance to the soil environment, most of phosphorus materials can improve the pH of the soil, influence the form of heavy metals in the soil, accelerate the conversion of the heavy metals from solubility to insolubility and reduce the absorption of plants to the heavy metals besides providing phosphorus. The existing research shows that the phosphorus-containing material mainly has better passivation effect on heavy metals such as Pb, Cd, Cu and the like, and the mechanism of the phosphorus-containing material is shown in the following aspects: raising the pH value of the soil to enable heavy metal ions to generate hydroxide precipitates; phosphate minerals (phosphorus-chlorine-lead ore and the like) with lower solubility are generated by the action of the released phosphate radicals and heavy metal ions; the soil heavy metal ions and the positive ions in the phosphorus-containing mineral crystal lattice are isomorphously replaced and fixed; the metal cations are fixed on the surface of the mineral through electrostatic adsorption and coprecipitation, and the action mechanisms possibly coexist in the actual environment. The phosphate can directly participate in the passivation of heavy metals in the soil, can convert non-residue Pb in the soil into residue, and reduces the leaching toxicity of Pb in the soil. Pb and phosphorus form extremely stable phosphorus-chlorine-lead ore [ Pb5(PO4)3Cl ], so that the absorption of Pb by plants is obviously reduced. And meanwhile, the radial migration of heavy metals in the soil profile can be inhibited. The lead polluted soil is treated by the phosphorylation biochar, and the restoration effect is good. The product uses the charcoal loaded with nano hydroxyapatite, can repair Pb-polluted soil in situ, has a Pb fixation rate of over 60 percent, improves the residue content of the soil, and reduces the bioavailability of the soil.
The straw pomace is used as an organic material, and can improve the porosity of soil, reduce the volume weight of the soil, improve the water permeability and increase the organic matter content of the soil after being added into the soil. Along with the decomposition of the straws, the humic acid in the soil is contributed, the humic acid contains various functional groups, and meanwhile, the straws can generate NH4+ and various organic anions in the decomposition process and can interact with heavy metal ions, mineral substances, toxic active pollutants and the like in the environment.
The passivator for soil heavy metal pollution treatment is suitable for soil remediation of sites polluted by heavy metals (copper, lead, cadmium, zinc, arsenic, mercury, nickel and the like). The dewatered sludge is collected by rural distributed treatment devices and sanitation trucks, and is used as the raw material after being detected to be qualified, so that the waste is changed into valuable; other main components of the invention are natural materials, which can not generate secondary pollution, has good passivation effect on heavy metals in farmland soil, can improve the content of organic matters and cation exchange capacity in soil, prevent soil hardening, effectively improve soil texture, adjust soil porosity, provide necessary nutrient substances for the survival of microorganisms, improve the physical and chemical properties of soil and a microorganism district system, and improve the production potential of soil.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1:
the passivator for soil heavy metal pollution treatment provided by the embodiment comprises 10 parts of dewatered sludge, 10 parts of lime, 15 parts of clay minerals, 15 parts of straw pomace and 40 parts of modified biochar in parts by weight, wherein the modified biochar is biochar loaded with nano-hydroxyapatite, and the nano-hydroxyapatite accounts for 5% of the modified biochar.
The preparation method of the passivator comprises the following steps:
firstly, sludge dewatering is carried out, namely sludge in a rural sewage treatment system or a septic tank which is qualified in detection is concentrated, the dewatered water content is less than 75%, and the sludge is stacked and naturally dried to obtain dewatered sludge;
secondly, preparing modified biochar, namely removing plastic, metal and bone impurities in wheat straws, rice straws and rice husks, feeding the primarily sorted raw materials into a crusher, crushing the crushed raw materials to obtain a particle size of 2-4cm, piling the uniformly stirred materials into a conical pile, introducing natural wind into the pile to ensure that a small amount of oxygen is contained in the pile and the pile is in a facultative state, maintaining the temperature of the pile at 70-90 ℃, supplementing nutrition and moisture regularly, performing low-temperature pyrolysis carbonization to obtain a biochar crude product, and finally adding 5% of hydroxyapatite to obtain the modified biochar;
thirdly, mixing and crushing, namely mixing 10 parts of dehydrated sludge, 10 parts of lime, 15 parts of clay minerals, 15 parts of straw pomace and 40 parts of modified biochar, crushing and crushing to obtain particles with the particle size of 1-2 mm;
fourthly, granulating, namely conveying the materials accounting for 30-40% of the total weight of the mixed materials into a disc granulator for granulation, controlling the inclination angle of a turntable of the granulator to be 40-50 degrees, gradually increasing the rotation speed of the granulator, finally controlling the rotation speed to be 55-60r/min, intermittently spraying water, continuously adding the rest materials, gradually growing the spherical cores, and controlling the whole granulation time to be 18-20 min;
and fifthly, adjusting the water content of the granules, sieving, packaging, directly drying the granulated materials in the sun or conveying the granulated materials to a dryer at 70-80 ℃ for drying to enable the water content of the materials to be less than 5.0%, sieving finished products, conveying the dried materials to a screen for sieving, and finally controlling the particle size of the finished products to be 1.0-3.0mm, thus preparing the environment-friendly farmland soil heavy metal passivator.
The implementation mode adopted by the passivator is in-situ or ex-situ stirring and mixing, and an all-in-one machine for soil remediation, a stirring hopper, rotary spraying and a rotary cultivator can be selected according to the characteristics of soil. The adding proportion is 1-10%, and 200-800kg is applied per mu. The heavy metal in the crop seeds can meet the requirements of the standard in the food safety national standard food pollutant limit (GB 2762-2017) by combining effective field planting management while applying.
The performance index of the product obtained in this example: the grain diameter is 1-2mm, the pH value of 10% aqueous solution is 7.5-8.5, the water content of the grains is 3% -5%, the cation exchange capacity is 120-150cmol/kg, and the leaching rate of heavy metal in the treated soil can be reduced by more than 90%.
Example 2:
the passivator for soil heavy metal pollution treatment provided by the embodiment comprises, by weight, 20 parts of dewatered sludge, 15 parts of lime, 20 parts of clay minerals, 10 parts of straw rotting residues and 30 parts of modified biochar.
The implementation mode adopted by the passivator is in-situ or ex-situ stirring and mixing, and an all-in-one machine for soil remediation, a stirring hopper, rotary spraying and a rotary cultivator can be selected according to the characteristics of soil. The adding proportion is 1-10%, and 200-800kg is applied per mu. The heavy metal in the crop seeds can meet the requirements of the standard in the food safety national standard food pollutant limit (GB 2762-2017) by combining effective field planting management while applying.
The performance index of the product obtained in this example: the grain diameter is 1-2mm, the pH value of 10% aqueous solution is 7.5-8.5, the water content of the grains is 3% -5%, the cation exchange capacity is 120-150cmol/kg, and the leaching rate of heavy metal in the treated soil can be reduced by more than 90%.
Example 3:
the passivator for soil heavy metal pollution treatment provided by the embodiment comprises 15 parts of dewatered sludge, 18 parts of lime, 20 parts of clay minerals, 18 parts of straw rotting residues and 35 parts of modified biochar in parts by weight.
The implementation mode adopted by the passivator is in-situ or ex-situ stirring and mixing, and an all-in-one machine for soil remediation, a stirring hopper, rotary spraying and a rotary cultivator can be selected according to the characteristics of soil. The adding proportion is 1-10%, and 200-800kg is applied per mu. The heavy metal in the crop seeds can meet the requirements of the standard in the food safety national standard food pollutant limit (GB 2762-2017) by combining effective field planting management while applying.
The performance index of the product obtained in this example: the grain diameter is 1-2mm, the pH value of 10% aqueous solution is 7.5-8.5, the water content of the grains is 3% -5%, the cation exchange capacity is 120-150cmol/kg, and the leaching rate of heavy metal in the treated soil can be reduced by more than 90%.
Claims (2)
1. The passivator for soil heavy metal pollution treatment is characterized by comprising the following components in parts by weight: the biological modified charcoal comprises, by weight, 10-20 parts of dehydrated sludge, 10-15 parts of lime, 15-20 parts of clay minerals, 10-15 parts of straw pomace and 30-40 parts of modified biological charcoal, wherein the modified biological charcoal is biological charcoal loaded with nano-hydroxyapatite, and the nano-hydroxyapatite accounts for 2-8% of the modified biological charcoal.
2. The preparation method of the passivator for soil heavy metal pollution treatment according to claim 1, characterized by comprising the following steps:
firstly, sludge dewatering is carried out, namely sludge in a rural sewage treatment system or a septic tank which is qualified in detection is concentrated, the dewatered water content is less than 75%, and the sludge is stacked and naturally dried to obtain dewatered sludge;
secondly, preparing modified biochar, namely removing plastic, metal and bone impurities in wheat straws, rice straws and rice husks, feeding the primarily sorted raw materials into a crusher, crushing the crushed raw materials to obtain a particle size of 2-4cm, piling the uniformly stirred materials into a conical pile, introducing natural wind into the pile to ensure that a small amount of oxygen is contained in the pile and the pile is in a facultative state, maintaining the temperature of the pile at 70-90 ℃, supplementing nutrition and moisture regularly, performing low-temperature pyrolysis carbonization to obtain a biochar crude product, and finally adding 2-8% of hydroxyapatite to obtain the modified biochar;
thirdly, mixing and crushing, namely mixing 10-20 parts of dewatered sludge, 10-15 parts of lime, 15-20 parts of clay mineral, 10-15 parts of straw pomace and 30-40 parts of modified biochar, crushing to obtain particles with the particle size of 1-2 mm;
fourthly, granulating, namely conveying the materials accounting for 30-40% of the total weight of the mixed materials into a disc granulator for granulation, controlling the inclination angle of a turntable of the granulator to be 40-50 degrees, gradually increasing the rotation speed of the granulator, finally controlling the rotation speed to be 55-60r/min, intermittently spraying water, continuously adding the rest materials, gradually growing the spherical cores, and controlling the whole granulation time to be 18-20 min;
and fifthly, adjusting the water content of the granules, sieving, packaging, directly drying the granulated materials in the sun or conveying the granulated materials to a dryer at 70-80 ℃, sieving finished products, conveying the dried materials to a screen mesh for sieving, and finally controlling the particle size of the finished products to be 1.0-3.0mm to obtain the passivator for treating the heavy metal pollution of the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308090.XA CN111171830A (en) | 2019-12-18 | 2019-12-18 | Passivator for soil heavy metal pollution treatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911308090.XA CN111171830A (en) | 2019-12-18 | 2019-12-18 | Passivator for soil heavy metal pollution treatment and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111171830A true CN111171830A (en) | 2020-05-19 |
Family
ID=70617996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911308090.XA Pending CN111171830A (en) | 2019-12-18 | 2019-12-18 | Passivator for soil heavy metal pollution treatment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111171830A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922070A (en) * | 2020-08-25 | 2020-11-13 | 中国电建集团中南勘测设计研究院有限公司 | Floating material, heavy metal contaminated soil remediation method based on floating material and application |
| CN112090950A (en) * | 2020-05-23 | 2020-12-18 | 北京博泰至淳生物科技有限公司 | Paddy field heavy metal pollution remediation material and processing method and remediation method thereof |
| CN113736470A (en) * | 2021-09-15 | 2021-12-03 | 昆明理工大学 | Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas |
| CN113929522A (en) * | 2021-09-13 | 2022-01-14 | 中达翰星环境修复有限公司 | Mine restoration base material and method for restoring mine pollution by using same |
| CN114350377A (en) * | 2022-01-25 | 2022-04-15 | 南京信息工程大学 | Soil conditioner based on sludge hydrothermal gasification by-product, preparation method and application |
| CN114574214A (en) * | 2022-03-14 | 2022-06-03 | 北京中力信达环境技术有限公司 | Artificial magnetic soil and preparation method and application thereof |
| CN115784561A (en) * | 2022-12-01 | 2023-03-14 | 内蒙古嗨泥环保科技有限公司 | Method for preparing nutrient soil from domestic sludge in one minute |
| CN115785969A (en) * | 2022-12-13 | 2023-03-14 | 江苏省沿海开发集团有限公司 | Soil conditioner for improving coastal salinized soil |
Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172899A (en) * | 2007-09-30 | 2008-05-07 | 浙江大学 | Sludge compost with bamboo charcoal as heavy metal fixation solution and method for producing the same |
| CN104368306A (en) * | 2014-08-19 | 2015-02-25 | 上海玉垒环境生物技术有限公司 | Preparation method of biochar-like matter used for heavy metal contaminated soil repair |
| CN105062495A (en) * | 2015-08-17 | 2015-11-18 | 深圳市铁汉生态环境股份有限公司 | Heavy metal stabilizer |
| CN105567247A (en) * | 2016-02-04 | 2016-05-11 | 周益辉 | Heavy metal-contaminated soil remediation agent and preparation method thereof |
| CN105670640A (en) * | 2016-01-07 | 2016-06-15 | 湖南美鑫隆生态环保科技有限公司 | Composite soil conditioner for treating Cd pollution, and preparation and use methods thereof |
| CN105754610A (en) * | 2016-02-04 | 2016-07-13 | 周益辉 | Heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent and preparation method thereof |
| CN105754611A (en) * | 2016-02-04 | 2016-07-13 | 周益辉 | Heavy metal contaminated soil restorative agent as well as preparation method thereof and application thereof |
| CN105969361A (en) * | 2016-03-17 | 2016-09-28 | 凤阳徽亨商贸有限公司 | Highly-efficient soil heavy metal restoration agent |
| CN106045762A (en) * | 2016-05-27 | 2016-10-26 | 扬州大学 | Beach saline-alkali soil conditioner with both soil improvement and fertilizer efficiency and preparation method and application thereof |
| CN106190164A (en) * | 2016-08-25 | 2016-12-07 | 惠安华晨贸易有限公司 | A kind of cadmium pollution soil renovation agent and preparation method thereof |
| CN106734123A (en) * | 2016-11-18 | 2017-05-31 | 东莞中科土壤科技开发有限公司 | A kind of composite conditioner repaired for heavy metal polluted soil of farmland and preparation method thereof |
| CN106978185A (en) * | 2017-05-16 | 2017-07-25 | 山东创业环保科技发展有限公司 | A kind of heavy-metal contaminated soil repairs conditioner and its application |
| CN107282625A (en) * | 2017-08-17 | 2017-10-24 | 北京高能时代环境技术股份有限公司 | A kind of heavy-metal contaminated soil renovation agent and its application and the method for repairing polluted soil |
| CN107311791A (en) * | 2016-11-29 | 2017-11-03 | 南京索益盟环保科技有限公司 | A kind of preparation of environment-friendly type farmland soil heavy metals passivator and its application method |
| CN107384426A (en) * | 2017-08-09 | 2017-11-24 | 黄莉 | A kind of renovation agent of cation heavy-metal contaminated soil and preparation method thereof |
| CN107603635A (en) * | 2017-09-25 | 2018-01-19 | 芜湖恒杰膨润土科技有限公司 | A kind of bentonite modifying agent of Sludge |
| CN107936981A (en) * | 2017-11-15 | 2018-04-20 | 中国环境科学研究院 | Soil heavy metal combined passivator and preparation method thereof, application method and application |
| CN108003879A (en) * | 2017-10-31 | 2018-05-08 | 浦江县合洪园艺研发有限公司 | A kind of modifying agent for chemical pollution soil |
| CN108148598A (en) * | 2017-12-12 | 2018-06-12 | 常州市雄泰纺织品有限公司 | A kind of heavy-metal contaminated soil passivator and preparation method thereof |
| CN108218627A (en) * | 2018-02-08 | 2018-06-29 | 东莞市史雷帝三维数控科技有限公司 | A kind of chemical formulation of efficient soil conditioner |
| CN108690624A (en) * | 2018-05-15 | 2018-10-23 | 武汉都市环保工程技术股份有限公司 | A kind of Compound Heavy Metals soil passivator and its preparation method and application |
| CN108728107A (en) * | 2018-05-25 | 2018-11-02 | 合肥慧谷农业科技有限公司 | A kind of soil conditioner and preparation method thereof handling heavy metal |
| CN108841398A (en) * | 2018-08-09 | 2018-11-20 | 北京泷涛环境修复有限公司 | Medicament, preparation method and restorative procedure are repaired in passivation for As polluted soil |
| CN109456768A (en) * | 2018-11-28 | 2019-03-12 | 南京大学 | A kind of heavy metal cadmium soil renovation agent, preparation method and application method |
| CN109622599A (en) * | 2019-02-02 | 2019-04-16 | 湖南大学 | A method of arsenic pollution agricultural land soil is repaired using dewatered sludge and charcoal Mixed Surfactant System |
| CN109675917A (en) * | 2018-12-29 | 2019-04-26 | 安徽蓝鼎环保能源科技有限公司 | A method of utilizing agricultural crop straw rehabilitating soil |
| CN110551504A (en) * | 2019-05-13 | 2019-12-10 | 北京化工大学 | Hydroxyapatite-modified biochar material and application thereof |
-
2019
- 2019-12-18 CN CN201911308090.XA patent/CN111171830A/en active Pending
Patent Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172899A (en) * | 2007-09-30 | 2008-05-07 | 浙江大学 | Sludge compost with bamboo charcoal as heavy metal fixation solution and method for producing the same |
| CN104368306A (en) * | 2014-08-19 | 2015-02-25 | 上海玉垒环境生物技术有限公司 | Preparation method of biochar-like matter used for heavy metal contaminated soil repair |
| CN105062495A (en) * | 2015-08-17 | 2015-11-18 | 深圳市铁汉生态环境股份有限公司 | Heavy metal stabilizer |
| CN105670640A (en) * | 2016-01-07 | 2016-06-15 | 湖南美鑫隆生态环保科技有限公司 | Composite soil conditioner for treating Cd pollution, and preparation and use methods thereof |
| CN105754611A (en) * | 2016-02-04 | 2016-07-13 | 周益辉 | Heavy metal contaminated soil restorative agent as well as preparation method thereof and application thereof |
| CN105754610A (en) * | 2016-02-04 | 2016-07-13 | 周益辉 | Heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent and preparation method thereof |
| CN105567247A (en) * | 2016-02-04 | 2016-05-11 | 周益辉 | Heavy metal-contaminated soil remediation agent and preparation method thereof |
| CN105969361A (en) * | 2016-03-17 | 2016-09-28 | 凤阳徽亨商贸有限公司 | Highly-efficient soil heavy metal restoration agent |
| CN106045762A (en) * | 2016-05-27 | 2016-10-26 | 扬州大学 | Beach saline-alkali soil conditioner with both soil improvement and fertilizer efficiency and preparation method and application thereof |
| CN106190164A (en) * | 2016-08-25 | 2016-12-07 | 惠安华晨贸易有限公司 | A kind of cadmium pollution soil renovation agent and preparation method thereof |
| CN106734123A (en) * | 2016-11-18 | 2017-05-31 | 东莞中科土壤科技开发有限公司 | A kind of composite conditioner repaired for heavy metal polluted soil of farmland and preparation method thereof |
| CN107311791A (en) * | 2016-11-29 | 2017-11-03 | 南京索益盟环保科技有限公司 | A kind of preparation of environment-friendly type farmland soil heavy metals passivator and its application method |
| CN106978185A (en) * | 2017-05-16 | 2017-07-25 | 山东创业环保科技发展有限公司 | A kind of heavy-metal contaminated soil repairs conditioner and its application |
| CN107384426A (en) * | 2017-08-09 | 2017-11-24 | 黄莉 | A kind of renovation agent of cation heavy-metal contaminated soil and preparation method thereof |
| CN107282625A (en) * | 2017-08-17 | 2017-10-24 | 北京高能时代环境技术股份有限公司 | A kind of heavy-metal contaminated soil renovation agent and its application and the method for repairing polluted soil |
| CN107603635A (en) * | 2017-09-25 | 2018-01-19 | 芜湖恒杰膨润土科技有限公司 | A kind of bentonite modifying agent of Sludge |
| CN108003879A (en) * | 2017-10-31 | 2018-05-08 | 浦江县合洪园艺研发有限公司 | A kind of modifying agent for chemical pollution soil |
| CN107936981A (en) * | 2017-11-15 | 2018-04-20 | 中国环境科学研究院 | Soil heavy metal combined passivator and preparation method thereof, application method and application |
| CN108148598A (en) * | 2017-12-12 | 2018-06-12 | 常州市雄泰纺织品有限公司 | A kind of heavy-metal contaminated soil passivator and preparation method thereof |
| CN108218627A (en) * | 2018-02-08 | 2018-06-29 | 东莞市史雷帝三维数控科技有限公司 | A kind of chemical formulation of efficient soil conditioner |
| CN108690624A (en) * | 2018-05-15 | 2018-10-23 | 武汉都市环保工程技术股份有限公司 | A kind of Compound Heavy Metals soil passivator and its preparation method and application |
| CN108728107A (en) * | 2018-05-25 | 2018-11-02 | 合肥慧谷农业科技有限公司 | A kind of soil conditioner and preparation method thereof handling heavy metal |
| CN108841398A (en) * | 2018-08-09 | 2018-11-20 | 北京泷涛环境修复有限公司 | Medicament, preparation method and restorative procedure are repaired in passivation for As polluted soil |
| CN109456768A (en) * | 2018-11-28 | 2019-03-12 | 南京大学 | A kind of heavy metal cadmium soil renovation agent, preparation method and application method |
| CN109675917A (en) * | 2018-12-29 | 2019-04-26 | 安徽蓝鼎环保能源科技有限公司 | A method of utilizing agricultural crop straw rehabilitating soil |
| CN109622599A (en) * | 2019-02-02 | 2019-04-16 | 湖南大学 | A method of arsenic pollution agricultural land soil is repaired using dewatered sludge and charcoal Mixed Surfactant System |
| CN110551504A (en) * | 2019-05-13 | 2019-12-10 | 北京化工大学 | Hydroxyapatite-modified biochar material and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 中国农业大学等编著: "《家畜粪便学》", 31 August 1997 * |
| 李永峰: "《环境生物技术：典型厌氧环境微生物过程》", 31 August 2014, 哈尔滨工业大学出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090950A (en) * | 2020-05-23 | 2020-12-18 | 北京博泰至淳生物科技有限公司 | Paddy field heavy metal pollution remediation material and processing method and remediation method thereof |
| CN111922070A (en) * | 2020-08-25 | 2020-11-13 | 中国电建集团中南勘测设计研究院有限公司 | Floating material, heavy metal contaminated soil remediation method based on floating material and application |
| CN113929522A (en) * | 2021-09-13 | 2022-01-14 | 中达翰星环境修复有限公司 | Mine restoration base material and method for restoring mine pollution by using same |
| CN113736470A (en) * | 2021-09-15 | 2021-12-03 | 昆明理工大学 | Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas |
| CN113736470B (en) * | 2021-09-15 | 2022-07-19 | 昆明理工大学 | Method for preparing mining area soil conditioner from wet sludge in alpine and high-altitude areas |
| CN114350377A (en) * | 2022-01-25 | 2022-04-15 | 南京信息工程大学 | Soil conditioner based on sludge hydrothermal gasification by-product, preparation method and application |
| CN114574214A (en) * | 2022-03-14 | 2022-06-03 | 北京中力信达环境技术有限公司 | Artificial magnetic soil and preparation method and application thereof |
| CN115784561A (en) * | 2022-12-01 | 2023-03-14 | 内蒙古嗨泥环保科技有限公司 | Method for preparing nutrient soil from domestic sludge in one minute |
| CN115785969A (en) * | 2022-12-13 | 2023-03-14 | 江苏省沿海开发集团有限公司 | Soil conditioner for improving coastal salinized soil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111171830A (en) | Passivator for soil heavy metal pollution treatment and preparation method thereof | |
| CN102807872B (en) | Biochar mixing type protected horticultural vegetable field soil heavy metal passivant and preparation method thereof | |
| CN110283599B (en) | Heavy metal contaminated soil remediation agent and preparation method thereof | |
| CN105713619B (en) | Method for preparing iron silicon sulfur multi-element composite biochar soil heavy metal conditioner | |
| CN101928179B (en) | Slow release fertilizer having soil remediation function and soil contamination remediation method | |
| CN108129200A (en) | Active micro-nano composite soil conditioner of agricultural charcoal and preparation method thereof | |
| CN108080408A (en) | A kind of method of repairing heavy metal in soil pollution | |
| CN108559521B (en) | Soil passivator for reducing soil biological available cadmium and preparation method and use method thereof | |
| CN113527000A (en) | Compound agent for passivation remediation of heavy metal contaminated farmland soil and application thereof | |
| CN107337566B (en) | Biological fertilizer capable of repairing heavy metal contaminated soil and preparation method thereof | |
| CN103788955B (en) | For the treatment of the cadmium fixing agent of contaminated soil and the treatment process of this soil | |
| CN108160037B (en) | Modified biochar and preparation method thereof | |
| Mosa et al. | Chemo-mechanical modification of cottonwood for Pb2+ removal from aqueous solutions: Sorption mechanisms and potential application as biofilter in drip-irrigation | |
| CN114192565B (en) | Novel method for repairing heavy metal cadmium, arsenic, mercury, lead and chromium composite contaminated soil | |
| CN112239671A (en) | Passivator for arsenic and cadmium compound polluted farmland and use method thereof | |
| CN110591728B (en) | Conditioner for mercury-polluted soil and preparation method thereof | |
| CN111072432A (en) | Hydroxyapatite/active carbon efficient soil conditioner and application thereof | |
| CN117063655B (en) | Method for preventing and controlling rice field submerged cultivation and cooperatively reducing cadmium in water flooding environment | |
| CN114029333A (en) | Novel method for repairing soil polluted by heavy metals of cadmium, lead, mercury and chromium | |
| CN113248333A (en) | Granular soil conditioner for composite heavy metal pollution and preparation method thereof | |
| CN107353904B (en) | Preparation and use method of soil heavy metal passivator with low secondary environmental risk | |
| CN114014724A (en) | Coated organic fertilizer for improving heavy metal contaminated soil and preparation method thereof | |
| CN113800973A (en) | Soil conditioner suitable for acidic farmland and preparation method thereof | |
| CN109913233B (en) | Rice field soil heavy metal passivation modifier | |
| CN117003598A (en) | Biological bacterial fertilizer and application thereof in repairing micro-plastic-heavy metal composite contaminated soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200519 |