CN111269722A - Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof - Google Patents
Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof Download PDFInfo
- Publication number
- CN111269722A CN111269722A CN202010133851.9A CN202010133851A CN111269722A CN 111269722 A CN111269722 A CN 111269722A CN 202010133851 A CN202010133851 A CN 202010133851A CN 111269722 A CN111269722 A CN 111269722A
- Authority
- CN
- China
- Prior art keywords
- slow
- repairing agent
- arsenic
- cadmium
- preparation
- 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.)
- Granted
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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/12—Water-soluble silicates, e.g. waterglass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
-
- 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
- C09K2101/00—Agricultural use
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and a preparation method thereof, wherein the preparation method comprises the following steps: (1) fully stirring and uniformly mixing calcium carbonate and a calcium magnesium phosphate fertilizer, calcining under the protection of nitrogen, and grinding and crushing the calcined mixture to obtain a compound A; (2) adding potassium silicate into water, fully stirring to dissolve the potassium silicate, uniformly spraying the dissolved potassium silicate solution on the surface of iron powder, and then granulating on a granulator to obtain mixture granules B; (3) placing the compound A and the mixture particles B in a granulator, and gradually spraying pure water until the surface layers of the mixture particles B are uniformly coated with the compound A to form particles with the diameter of 3-5 mm; (4) and (4) drying the particles obtained in the step (3) until the moisture content is less than or equal to 5%, thus obtaining the slow-release repairing agent. The slow-release repairing agent disclosed by the invention can implement cadmium and arsenic synchronous passivation and control in the key growth period of rice, is small in dosage, effectively reduces the cadmium and arsenic content of rice, and is remarkable and stable in effect.
Description
Technical Field
The invention belongs to the technical field of soil remediation, and particularly relates to a slow-release remediation agent for treating cadmium-arsenic compound contaminated paddy soil and a preparation method thereof.
Background
The farmland soil is a basic condition for agricultural production and cultivation, and the health condition and the nutrient content in the soil directly influence the growth of crops. With the rapid development of industry and agriculture, a large amount of pollutants, particularly heavy metals, enter the soil environment, and soil pollution is gradually serious. Meanwhile, the excessive use of agricultural input products is also one of the important factors causing the heavy metal pollution of the soil. Cadmium and arsenic are common polluting elements in cultivated land soil. The 2014 national soil environment survey bulletin shows that the standard exceeding rate of the positions of cadmium and arsenic in the national soil is 7.0% and 2.7% respectively. Cadmium and arsenic combined pollution often occurs in farmland soil, so that the cadmium and arsenic content of crops exceeds the standard.
The in-situ passivation technology is one of the most common technologies for remedying and treating the soil of the heavy metal polluted farmland. The cadmium passivator commonly used at present mainly comprises lime, sepiolite, zeolite, phosphate rock, red mud, fly ash, biochar and the like, and the arsenic passivator mainly comprises iron-containing materials, rare earth elements, modified biochar and the like. Cadmium is mainly divalent cation (Cd) in soil2+) In the presence of arsenic, which tends to be oxygenated in the soilArsenate (AsO)4 5-) Or arsenite (AsO)3 3-) The form exists. Due to the difference of the properties of cadmium and arsenic and the difference of the forms of cadmium and arsenic in soil, the current passivator for treating cadmium-polluted soil is not suitable for treating arsenic-polluted soil, and the passivator for treating arsenic-polluted soil is not suitable for treating cadmium-polluted soil. For example, a large amount of alkaline materials are adopted for repairing cadmium-polluted soil at present, and are used for improving the pH value of the soil, so that cadmium forms hydroxide precipitates, and the aim of reducing the effectiveness of cadmium in the soil is fulfilled; but the increase of the pH value of the soil has an activating effect on arsenic in the soil, improves the effectiveness of the arsenic in the soil and is not suitable for the remediation and treatment of the arsenic-polluted soil. Obviously, the difficulty of synchronously repairing the cadmium-arsenic composite polluted soil is greater than that of single cadmium pollution or arsenic pollution.
Due to the difference of the properties of cadmium and arsenic and the difference of the forms of cadmium and arsenic in soil, the cadmium and arsenic can not be synchronously passivated by the conventional passivating material aiming at the soil of the rice field compositely polluted by cadmium and arsenic, and the content of cadmium and arsenic in rice can not be synchronously reduced. Therefore, aiming at the difficulty of synchronous remediation and treatment of the cadmium-arsenic composite polluted soil, the remediation agent capable of realizing the synchronous passivation of cadmium and arsenic is developed, the cadmium and arsenic content in the rice is effectively reduced, the safe utilization of the cadmium-arsenic composite polluted rice field soil is realized, and the method has important practical value and practical significance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a slow-release repairing agent which can implement cadmium and arsenic synchronous passivation and resistance control in the key growth period of rice, and has the advantages of small dosage, obvious effect and stability, and a preparation method thereof.
The invention provides a preparation method of a slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil, which comprises the following steps:
(1) fully stirring and uniformly mixing 40-60 parts by mass of calcium carbonate and 10-20 parts by mass of calcium magnesium phosphate fertilizer, keeping the temperature at 300-400 ℃ for 3-5 hours at a heating rate of 10-15 ℃ per minute under the protection of nitrogen, then reducing the temperature to room temperature under the protection of nitrogen, grinding and crushing the calcined mixture, and sieving the ground mixture by a 100-300-mesh sieve to obtain a compound A of calcium carbonate and calcium magnesium phosphate fertilizer;
(2) adding 2-8 parts by mass of potassium silicate into 5 parts by mass of water, fully stirring to dissolve the potassium silicate, uniformly spraying the dissolved potassium silicate solution on the surface of 20-40 parts by mass of iron powder, and granulating on a granulator to obtain mixture granules B of the iron powder and the potassium silicate with the diameter of 1-3 mm;
(3) placing the compound A and the mixture particles B in a granulator according to the weight ratio of (50-70) to (40-20), and gradually spraying 10 parts by weight of water until the surface layers of the mixture particles B are uniformly coated with the compound A to form particles with the diameter of 3-5 mm;
(4) and (4) drying the particles obtained in the step (3) until the moisture content is less than or equal to 5%, thus obtaining the slow-release repairing agent.
Further, the percentage of particles with the diameter of 3-5 mm in the particles obtained in the step (3) is not less than 90%.
Further, the drying conditions in the step (4) are as follows: the temperature is 110-130 ℃, and the time is 2-4 h.
Further, the calcium carbonate is light calcium carbonate or heavy calcium carbonate, the content of the calcium carbonate is more than or equal to 95%, and the particle size is 100-500 meshes.
Further, the iron powder is one or a mixture of ordinary iron powder, reduced iron powder and atomized iron powder in any proportion, the iron content is more than or equal to 98%, and the particle size is 100-500 meshes.
Further, P in the calcium magnesium phosphate fertilizer2O512-25% of CaO, 25-40% of SiO220-35% of MgO and 5-15% of MgO.
Further, the potassium silicate is instant potassium silicate, and the content is more than or equal to 99%.
Further, the heavy metal content in all the components meets the following requirements: pb <50mg/kg, Cd <2mg/kg, As <15mg/kg, Cr <100mg/kg, Hg <1 mg/kg.
The invention also provides a slow-release type repairing agent for treating the cadmium-arsenic composite polluted paddy soil, and the slow-release type repairing agent is prepared according to any one of the methods in the scheme.
The mechanism of the invention for synchronously passivating the cadmium and the arsenic in the soil is that ① alkaline materials such As limestone, calcium magnesium phosphate fertilizer, potassium silicate and the like are applied to improve the pH value of the soil and obviously reduce the activity of Cd in the soil, ② phosphate mineral materials in the calcium magnesium phosphate fertilizer and the Cd can form phosphide precipitates, ③ iron oxide formed by iron powder in the soil can adsorb As in the soil and reduce the activity of As, ④ iron powder can regulate the composition and the thickness of an iron film on rice roots, enhance the capacity of adsorbing and controlling the cadmium and the arsenic on the iron film, reduce the cadmium and the arsenic from entering roots, and ⑤ a large amount of Si elements contained in the calcium magnesium phosphate fertilizer and the potassium silicate can promote the growth of rice and improve the resistance of the rice to heavy metals.
The invention has the beneficial effects that:
(1) the slow-release type repairing agent prepared by the method disclosed by the invention is high in efficiency, various passivation repairing mechanisms are efficiently fused, various passivation materials are organically combined, the proportioning parameters are optimized, the synchronous passivation of cadmium and arsenic in soil can be realized, the cadmium content of rice is effectively reduced, the cadmium content of rice is reduced by more than 50%, the arsenic content is reduced by more than 30%, and the safe utilization of the cadmium-arsenic composite polluted rice field soil is realized;
(2) in the implementation process of the conventional soil in-situ passivator, as the precise inhibition control is not implemented in the key growth period of absorption and accumulation of cadmium and arsenic in rice, a large amount of passivator needs to be added in the previous period to ensure the passivation effect of the whole growth period of the rice, so that the passivator is large in application amount and unstable in effect, the slow-release granular repairing agent is prepared by coating repairing materials with different passivation principles layer by layer, the cadmium and arsenic synchronous passivation inhibition control can be implemented in the key growth period of the rice, the using amount is small, and the effect is remarkable and stable;
(3) the slow-release type repairing agent is suitable for repairing and treating the soil of the in-situ cadmium-arsenic composite polluted rice field, and has the advantages of convenient operation, small using amount and stable effect.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example 1:
(1) field test of soil physicochemical properties
The field effect verification experiment of the slow-release type repairing agent is carried out on the soil of a certain mild cadmium-polluted rice field in Shaoguan city, Guangdong province. The cadmium and arsenic content in the rice of the rice field exceeds the limit standard of pollutants in national food. The basic physicochemical properties of the soil are shown in Table 1.
TABLE 1 basic physicochemical Properties of the soil tested
(2) Preparation of slow-release repairing agent
The cadmium-arsenic slow-release type repairing agent comprises 45 parts of calcium carbonate, 35 parts of iron powder, 15 parts of calcium magnesium phosphate fertilizer and 5 parts of potassium silicate. Wherein the calcium carbonate is heavy calcium carbonate powder, the content of the calcium carbonate is more than or equal to 95 percent, and the particle size is 200 meshes; the iron powder is common iron powder, the iron content is more than or equal to 98 percent, and the particle size is 200 meshes; p in calcium magnesium phosphate fertilizer2O514.5% of CaO, 36.6% of SiO225.3 percent of MgO content and 8.2 percent of MgO content; the content of potassium silicate is more than or equal to 99 percent.
The preparation method comprises the following steps: (1) fully stirring and uniformly mixing calcium carbonate and a calcium magnesium phosphate fertilizer, keeping the mixture at the temperature of 400 ℃ for 3h at the temperature rising speed of 10 ℃ under the protection of nitrogen, then cooling to room temperature under the protection of nitrogen, grinding and crushing, and sieving with a 150-mesh sieve to obtain a compound A of the calcium carbonate and the calcium magnesium phosphate fertilizer; (2) adding potassium silicate into 5 parts by mass of water, fully stirring to dissolve the potassium silicate, uniformly spraying the dissolved potassium silicate solution on the surface of the iron powder, and then granulating on a granulator to obtain mixture particles B of the iron powder and the potassium silicate with the diameter of 1-3 mm; (3) placing the compound A and the mixture particles B in a granulator according to the mass ratio of 60:30, gradually spraying 10 parts by mass of water for granulation until the surface layers of the mixture particles B are uniformly coated with the compound A to form particles with the diameter of 3-5 mm, wherein the percentage of the particles with the diameter of 3-5 mm is 95.3%; (4) and (4) drying the particles obtained in the step (3) until the moisture content is less than or equal to 5%, thus obtaining the slow-release repairing agent.
Through detection, the contents of heavy metals Pb, Cd, As, Cr and Hg in the cadmium-arsenic slow-release type repairing agent are respectively 15.93 mg/kg, 0.64 mg/kg, 8.72 mg/kg, 33.60 mg/kg and 0.25 mg/kg.
(3) Test scheme in field
The rice variety is selected from early rice Xiang early long rice. 4 treatments are set in the field verification experiment, and the addition amounts of the slow-release type repairing agent are CK (no repairing agent), 150 kg/mu (T1), 300 kg/mu (T2) and 600 kg/mu (T3). And (3) uniformly spraying the slow-release repairing agent on the soil surface of the rice field 7 days before rice transplanting, and ploughing for 2-3 times until the slow-release repairing agent is uniformly mixed. Cell area 30m2(5m multiplied by 6m), water inlet and outlet ditches are independently arranged for each treatment, and single-row and single-irrigation of the community is ensured. Each treatment was repeated 3 times. The rice planting is carried out in a conventional management mode until the rice is mature.
After the rice is mature, 10 rice plants are collected by each cell respectively, and rhizosphere soil is collected. And (3) measuring the pH value of the soil, the effective Cd, Pb and As contents and the Cd, Pb and As contents in the rice.
(4) Results of field experiments
By applying the slow-release type repairing agent, the pH value of the soil is obviously increased, the effective Cd, Pb and As contents of the soil and the Cd, Pb and As contents of the rice are obviously reduced. Compared with a control CK, the application of the slow-release type repairing agent 150-600 kg/mu increases the pH value of the soil by 0.25-1.20 units, reduces the contents of effective Cd, Pb and As of the soil by 18.2-61.7%, 7.9-21.4% and 8.2-25.2%, and reduces the contents of Cd, Pb, As and inorganic As of rice by 27.0-54.1%, 5.9-26.5%, 10.0-17.7% and 18.7-35.0%.
TABLE 2 effectiveness of cadmium, lead and arsenic in the treated soils and cadmium, lead and arsenic content in rice
Example 2
(1) Field test of soil physicochemical properties
The slow-release type repairing agent field verification experiment is carried out on the soil of a certain medium-heavy cadmium-arsenic compound polluted rice field in Chenzhou city, Hunan province. The basic physicochemical properties of the soil are shown in Table 3.
TABLE 3 basic physicochemical Properties of the soil tested
(2) Preparation of slow-release repairing agent
The cadmium-arsenic slow-release type repairing agent comprises 60 parts of calcium carbonate, 25 parts of iron powder, 10 parts of calcium magnesium phosphate fertilizer and 5 parts of potassium silicate. Wherein the calcium carbonate is heavy calcium carbonate powder, the content of the calcium carbonate is more than or equal to 95 percent, and the particle size is 300 meshes; the iron powder is common iron powder, the iron content is more than or equal to 98 percent, and the particle size is 150 meshes; p in calcium magnesium phosphate fertilizer2O519.2% of CaO, 33.4% of SiO229.1 percent of MgO content and 5.6 percent of MgO content; the content of potassium silicate is more than or equal to 99 percent.
The preparation method comprises the following steps: (1) fully stirring and uniformly mixing calcium carbonate and a calcium magnesium phosphate fertilizer, keeping the mixture at the temperature of 300 ℃ for 3h at the temperature rising speed of 15 ℃ under the protection of nitrogen, then cooling to room temperature under the protection of nitrogen, grinding and crushing, and sieving with a 150-mesh sieve to obtain a compound A of the calcium carbonate and the calcium magnesium phosphate fertilizer; (2) adding potassium silicate into 5 parts by mass of water, fully stirring to dissolve the potassium silicate, uniformly spraying the dissolved potassium silicate solution on the surface of the iron powder, and then granulating on a granulator to obtain mixture particles B of the iron powder and the potassium silicate with the diameter of 1-3 mm; (3) placing the compound A and the mixture particles B in a granulator according to the mass ratio of 55:35, gradually spraying 10 parts by mass of water for granulation until the surface layers of the mixture particles B are uniformly coated with the mixture A to form particles with the diameter of 3-5 mm, wherein the percentage of the particles with the diameter of 3-5 mm is 92.7%; (4) and (4) drying the particles obtained in the step (3) until the moisture content is less than or equal to 5%, thus obtaining the slow-release repairing agent.
Through detection, the contents of heavy metals Pb, Cd, As, Cr and Hg in the cadmium-arsenic slow-release type repairing agent are respectively 19.47, 0.43, 7.52, 26.56 and 0.14 mg/kg.
(3) Test scheme in field
The rice variety is 5814. 2 treatments are set in the field verification experiment,the addition amounts of the sustained-release repairing agent are CK (no repairing agent is added) and 300 kg/mu (T1). And (3) uniformly spraying the slow-release repairing agent on the soil surface of the rice field 7 days before rice transplanting, and ploughing for 2-3 times until the slow-release repairing agent is uniformly mixed. Cell area 20m2(4m is multiplied by 5m), water inlet and outlet ditches are independently arranged for each treatment, and single-row and single-irrigation of the community is ensured. Each treatment was repeated 3 times. The rice planting is carried out in a conventional management mode until the rice is mature.
After the rice is mature, 10 rice plants are collected by each cell respectively, and rhizosphere soil is collected. And (3) measuring the pH value of the soil, the effective Cd and As contents and the Cd and As contents in the rice.
(4) Results of field experiments
By applying the slow-release type repairing agent, the pH value of the soil is obviously increased, the effective Cd and As contents of the soil and the Cd and As contents of the rice are obviously reduced. Compared with a control CK, the application of the slow-release type repairing agent is 300 kg/mu, so that the pH value of the soil is increased by 1.04 units, the effective Cd and As contents of the soil are respectively reduced by 59.5 percent and 28.9 percent, and the Cd, As and inorganic As contents of the rice are respectively reduced by 62.2 percent, 26.4 percent and 44.4 percent.
TABLE 4 effectiveness of cadmium, lead and arsenic in the soil treated and cadmium, lead and arsenic content in rice
According to the embodiment, the slow-release type repairing agent disclosed by the invention can synchronously reduce the contents of effective Cd and As in soil and the contents of Cd and As in rice, obviously reduces the accumulation of Cd and As in rice, and has important significance for repairing and treating the soil of the cadmium-arsenic composite polluted rice field, realizing the safe utilization of the cadmium-arsenic composite polluted rice field and ensuring the safe production of grains.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A preparation method of a slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil is characterized by comprising the following steps:
(1) fully stirring and uniformly mixing 40-60 parts by mass of calcium carbonate and 10-20 parts by mass of calcium magnesium phosphate fertilizer, keeping the temperature at 300-400 ℃ for 3-5 hours at a heating rate of 10-15 ℃ per minute under the protection of nitrogen, then reducing the temperature to room temperature under the protection of nitrogen, grinding and crushing the calcined mixture, and sieving the ground mixture by a 100-300-mesh sieve to obtain a compound A of calcium carbonate and calcium magnesium phosphate fertilizer;
(2) adding 2-8 parts by mass of potassium silicate into 5 parts by mass of water, fully stirring to dissolve the potassium silicate, uniformly spraying the dissolved potassium silicate solution on the surface of 20-40 parts by mass of iron powder, and granulating on a granulator to obtain mixture granules B of the iron powder and the potassium silicate with the diameter of 1-3 mm;
(3) and (3) mixing the compound A and the mixture particles B in parts by mass (50-70): (40-20) putting the mixture in a granulator, and gradually spraying 10 parts by mass of water until the surface layer of the mixture particles B is uniformly coated with the compound A to form particles with the diameter of 3-5 mm;
(4) and (4) drying the particles obtained in the step (3) until the moisture content is less than or equal to 5%, thus obtaining the slow-release repairing agent.
2. The preparation method of the slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil as claimed in claim 1, wherein the percentage of particles with the diameter of 3-5 mm in the particulate matters obtained in the step (3) is not less than 90%.
3. The preparation method of the slow-release type repairing agent for treating cadmium arsenic composite polluted paddy soil as claimed in claim 1, wherein the drying conditions in the step (4) are as follows: the temperature is 110-130 ℃, and the time is 2-4 h.
4. The preparation method of the slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil as claimed in claim 1, wherein the calcium carbonate is light calcium carbonate or heavy calcium carbonate, the content of the calcium carbonate is not less than 95%, and the particle size is 100-500 meshes.
5. The preparation method of the slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil as claimed in claim 1, wherein the iron powder is one or a mixture of ordinary iron powder, reduced iron powder and atomized iron powder in any proportion, the iron content is not less than 98%, and the particle size is 100-500 meshes.
6. The preparation method of the slow-release type repairing agent for treating cadmium-arsenic combined polluted paddy soil as claimed in claim 1, wherein P in the calcium magnesium phosphate fertilizer2O512-25% of CaO, 25-40% of SiO220-35% of MgO and 5-15% of MgO.
7. The preparation method of the slow-release type repairing agent for treating cadmium arsenic composite polluted paddy soil as claimed in claim 1, wherein the potassium silicate is instant potassium silicate, and the content is not less than 99%.
8. The preparation method of the slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil as claimed in claim 1, wherein the heavy metal content in all the components meets the following requirements: pb <50mg/kg, Cd <2mg/kg, As <15mg/kg, Cr <100mg/kg, Hg <1 mg/kg.
9. A slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil, which is characterized by being prepared according to the method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133851.9A CN111269722B (en) | 2020-03-02 | 2020-03-02 | Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133851.9A CN111269722B (en) | 2020-03-02 | 2020-03-02 | Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111269722A true CN111269722A (en) | 2020-06-12 |
| CN111269722B CN111269722B (en) | 2021-04-13 |
Family
ID=70995512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010133851.9A Active CN111269722B (en) | 2020-03-02 | 2020-03-02 | Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111269722B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939672A (en) * | 2021-04-01 | 2021-06-11 | 中科国兴（绵阳）科技有限公司 | Organic matter soil with farmland soil restoration function and preparation method thereof |
| CN112939696A (en) * | 2021-02-28 | 2021-06-11 | 湖南中米环保科技有限公司 | Soil conditioner for treating farmland cadmium and arsenic combined pollution and application method thereof |
| CN112997656A (en) * | 2021-03-08 | 2021-06-22 | 茂施农业科技有限公司 | Method for efficiently reducing standard exceeding of cadmium in rice by utilizing slow-release calcium |
| CN113136214A (en) * | 2021-04-29 | 2021-07-20 | 湖南省土壤肥料研究所 | Cadmium-arsenic passivated soil slow-release repairing agent and preparation method and application thereof |
| CN114149288A (en) * | 2021-11-26 | 2022-03-08 | 中南大学 | Rice cadmium and arsenic reduction slow-release compound agent, preparation method, application and treatment method |
| CN114381270A (en) * | 2022-01-27 | 2022-04-22 | 清华大学 | Preparation method of soil remediation agent based on industrial solid waste preparation, soil remediation agent and application thereof |
| CN114985446A (en) * | 2022-06-16 | 2022-09-02 | 中山大学 | Method for synchronously reducing cadmium and arsenic content of rice in acidic cadmium-arsenic composite polluted rice field |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5618682A (en) * | 1979-07-24 | 1981-02-21 | Onoda Cement Co Ltd | Improvement of soil contaminated with heavy metal |
| US20120215048A1 (en) * | 2011-02-15 | 2012-08-23 | Keith Edward Forrester | Metals solubility reduction optimization method |
| CN102919042A (en) * | 2012-11-21 | 2013-02-13 | 中国科学院亚热带农业生态研究所 | Method for planting ramie in soil seriously contaminated by heavy metal |
| CN105598153A (en) * | 2015-12-23 | 2016-05-25 | 湖南德宝恒嘉环保生物科技有限公司 | Matched improver and method for controlling heavy metal and arsenic compound contaminated soil |
| CN106675568A (en) * | 2016-12-15 | 2017-05-17 | 北京高能时代环境技术股份有限公司 | Passivator for repairing compound heavy metal polluted farmland and preparation and application thereof |
| CN106734161A (en) * | 2016-12-22 | 2017-05-31 | 环保桥（湖南）生态环境修复有限公司 | A kind of APP combined remediation methods for heavy metal pollution reparation of ploughing |
| CN106800933A (en) * | 2017-01-11 | 2017-06-06 | 四川宜可环保技术有限公司 | A kind of passivator repaired for farmland soil heavy metals combined pollution and its preparation and application |
| CN107541214A (en) * | 2016-06-28 | 2018-01-05 | 李�杰 | A kind of heavy metal stabilizer and its application method for administering industrial pollution place soil |
| CN107573191A (en) * | 2017-09-22 | 2018-01-12 | 中国环境科学研究院 | A kind of heavy metal stabilizer for soil ph improvement |
| CN108277007A (en) * | 2017-12-28 | 2018-07-13 | 湖南中创优农农业有限公司 | A kind of granular renovation agent and preparation method thereof for administering cadmium-arsenic combined pollution farmland |
| CN108772418A (en) * | 2018-07-24 | 2018-11-09 | 中向旭曜科技有限公司 | A kind of paddy soil cadmium arsenic synchronizes passivator and the preparation method and application thereof |
| CN109082277A (en) * | 2018-08-16 | 2018-12-25 | 湖南泰谷生态工程有限公司 | A kind of cadmium arsenic combined pollution renovation agent and the preparation method and application thereof |
| CN110184067A (en) * | 2019-06-03 | 2019-08-30 | 贵州师范大学 | A kind of repairing polluted soil modifying agent and modification method |
| CN110683885A (en) * | 2019-08-21 | 2020-01-14 | 上海市农业科学院 | Coated slow-release fertilizer and application thereof in inhibiting absorption of heavy metal cadmium and reducing loss of nitrogen |
| CN110724013A (en) * | 2019-08-30 | 2020-01-24 | 广州草木蕃环境科技有限公司 | Conditioner for repairing medium and light cadmium polluted soil and preparation method and use method thereof |
-
2020
- 2020-03-02 CN CN202010133851.9A patent/CN111269722B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5618682A (en) * | 1979-07-24 | 1981-02-21 | Onoda Cement Co Ltd | Improvement of soil contaminated with heavy metal |
| US20120215048A1 (en) * | 2011-02-15 | 2012-08-23 | Keith Edward Forrester | Metals solubility reduction optimization method |
| CN102919042A (en) * | 2012-11-21 | 2013-02-13 | 中国科学院亚热带农业生态研究所 | Method for planting ramie in soil seriously contaminated by heavy metal |
| CN105598153A (en) * | 2015-12-23 | 2016-05-25 | 湖南德宝恒嘉环保生物科技有限公司 | Matched improver and method for controlling heavy metal and arsenic compound contaminated soil |
| CN107541214A (en) * | 2016-06-28 | 2018-01-05 | 李�杰 | A kind of heavy metal stabilizer and its application method for administering industrial pollution place soil |
| CN106675568A (en) * | 2016-12-15 | 2017-05-17 | 北京高能时代环境技术股份有限公司 | Passivator for repairing compound heavy metal polluted farmland and preparation and application thereof |
| CN106734161A (en) * | 2016-12-22 | 2017-05-31 | 环保桥（湖南）生态环境修复有限公司 | A kind of APP combined remediation methods for heavy metal pollution reparation of ploughing |
| CN106800933A (en) * | 2017-01-11 | 2017-06-06 | 四川宜可环保技术有限公司 | A kind of passivator repaired for farmland soil heavy metals combined pollution and its preparation and application |
| CN107573191A (en) * | 2017-09-22 | 2018-01-12 | 中国环境科学研究院 | A kind of heavy metal stabilizer for soil ph improvement |
| CN108277007A (en) * | 2017-12-28 | 2018-07-13 | 湖南中创优农农业有限公司 | A kind of granular renovation agent and preparation method thereof for administering cadmium-arsenic combined pollution farmland |
| CN108772418A (en) * | 2018-07-24 | 2018-11-09 | 中向旭曜科技有限公司 | A kind of paddy soil cadmium arsenic synchronizes passivator and the preparation method and application thereof |
| CN109082277A (en) * | 2018-08-16 | 2018-12-25 | 湖南泰谷生态工程有限公司 | A kind of cadmium arsenic combined pollution renovation agent and the preparation method and application thereof |
| CN110184067A (en) * | 2019-06-03 | 2019-08-30 | 贵州师范大学 | A kind of repairing polluted soil modifying agent and modification method |
| CN110683885A (en) * | 2019-08-21 | 2020-01-14 | 上海市农业科学院 | Coated slow-release fertilizer and application thereof in inhibiting absorption of heavy metal cadmium and reducing loss of nitrogen |
| CN110724013A (en) * | 2019-08-30 | 2020-01-24 | 广州草木蕃环境科技有限公司 | Conditioner for repairing medium and light cadmium polluted soil and preparation method and use method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 廖雄辉等: "南荻炭基土壤调理剂施用对水稻光合特性及产量的影响", 《中国农业科技导报》 * |
| 徐珺等: "2 种组配改良剂修复镉砷复合污染稻田土壤的研究", 《环境科学学报》 * |
| 陈立伟等: "土壤调理剂对土壤-水稻***Cd、Zn迁移累积的影响及健康风险评价", 《环境科学学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939696A (en) * | 2021-02-28 | 2021-06-11 | 湖南中米环保科技有限公司 | Soil conditioner for treating farmland cadmium and arsenic combined pollution and application method thereof |
| CN112997656A (en) * | 2021-03-08 | 2021-06-22 | 茂施农业科技有限公司 | Method for efficiently reducing standard exceeding of cadmium in rice by utilizing slow-release calcium |
| CN112939672A (en) * | 2021-04-01 | 2021-06-11 | 中科国兴（绵阳）科技有限公司 | Organic matter soil with farmland soil restoration function and preparation method thereof |
| CN113136214A (en) * | 2021-04-29 | 2021-07-20 | 湖南省土壤肥料研究所 | Cadmium-arsenic passivated soil slow-release repairing agent and preparation method and application thereof |
| CN114149288A (en) * | 2021-11-26 | 2022-03-08 | 中南大学 | Rice cadmium and arsenic reduction slow-release compound agent, preparation method, application and treatment method |
| CN114381270A (en) * | 2022-01-27 | 2022-04-22 | 清华大学 | Preparation method of soil remediation agent based on industrial solid waste preparation, soil remediation agent and application thereof |
| CN114381270B (en) * | 2022-01-27 | 2023-03-14 | 清华大学 | Preparation method of soil remediation agent prepared based on industrial solid waste, soil remediation agent and application of soil remediation agent |
| CN114985446A (en) * | 2022-06-16 | 2022-09-02 | 中山大学 | Method for synchronously reducing cadmium and arsenic content of rice in acidic cadmium-arsenic composite polluted rice field |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111269722B (en) | 2021-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111269722B (en) | Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof | |
| JP6895590B2 (en) | Safe production of rice in moderately and mildly heavily contaminated soil | |
| US10131840B2 (en) | Method for preparing iron silicon sulfur multi-element composite biochar soil heavy metal conditioner | |
| CN100515966C (en) | Method for treating sludge heavy metal | |
| CN107603632B (en) | Inorganic-organic composite soil conditioner and application thereof | |
| CN107418586B (en) | Granular south rice field acid soil conditioner taking rice husks as matrix | |
| CN102515944A (en) | Solid coated slow release selenium fertilizer and its preparation method | |
| CN114192565B (en) | Novel method for repairing heavy metal cadmium, arsenic, mercury, lead and chromium composite contaminated soil | |
| CN109609131B (en) | Iron-based conditioner for reducing cadmium enrichment of rice and preparation method and application thereof | |
| CN105001020A (en) | Compound mixing fertilizer having heavy metal passivation effect, preparation method and uses thereof | |
| CN112239671A (en) | Passivator for arsenic and cadmium compound polluted farmland and use method thereof | |
| CN104478636A (en) | Alkaline slow-release compound fertilizer capable of regulating soil acidity and reducing cadmium content of rice and preparation method thereof | |
| CN108774531A (en) | A kind of renovation agent and preparation method thereof for administering alkaline cadmium pollution soil | |
| CN108218571A (en) | A kind of distributing pig farm fermentation waste prepares slow-release fertilizer method with zeolite compound | |
| CN109265273A (en) | A kind of preparation method and application of the Compound Heavy Metals passivator of suitable acid red soil of south China | |
| CN112430171A (en) | Method for improving acidified soil by using gasified slag and acidified soil conditioner | |
| CN109453736B (en) | Soil conditioner of silicon-sulfur-selenium-zinc multi-element composite attapulgite and preparation method thereof | |
| CN117063655B (en) | Method for preventing and controlling rice field submerged cultivation and cooperatively reducing cadmium in water flooding environment | |
| CN112453046A (en) | Composite conditioner for repairing acidic cadmium-containing polluted soil, repairing method and application | |
| CN113387751B (en) | Alkaline functional fertilizer and preparation method and application thereof | |
| CN114015451A (en) | Alkalescent soil cadmium passivator and application thereof | |
| CN114214074A (en) | Selenium-rich soil conditioner for soil heavy metal remediation and preparation method and application thereof | |
| CN112358359A (en) | Soil conditioner and application thereof in reducing cadmium content of brown rice | |
| CN112029505A (en) | Soil conditioner for passivating farmland heavy metals and preparation method thereof | |
| CN113755178A (en) | Stabilizing repairing agent capable of simultaneously stabilizing arsenic and cadmium polluted soil as well as preparation method and using method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |