阅读说明：本技术 一种农田重金属污染修复剂及其制备方法 (Farmland heavy metal pollution remediation agent and preparation method thereof ) 是由 刘云 文阳平 左思佳 刘君 韩建龙 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种农田重金属污染修复剂,包括土壤修复剂,所述土壤修复剂由如下重量份的原料：20-30份的牡蛎壳、10-20份的有机肥、13-17份的无机肥、7-10份的秸秆、8-12份的花生壳、6-9份的稻壳、2-6份的微生物制剂。本发明采用牡蛎壳与多种有机营养物质复配而成,含有生物烟碱、16种氨基酸和多种中微量元素,牡蛎壳粉末具有2-10微米微聚孔结构,能中和土壤酸度、钝化重金属、促进有益微生物繁殖,同时可促进农作物根系发育,具有保水、保肥,增加光合产物、抗旱、抗寒、抗病等功能。(The invention discloses a farmland heavy metal pollution repairing agent, which comprises a soil repairing agent, wherein the soil repairing agent is prepared from the following raw materials in parts by weight: 20-30 parts of oyster shell, 10-20 parts of organic fertilizer, 13-17 parts of inorganic fertilizer, 7-10 parts of straw, 8-12 parts of peanut shell, 6-9 parts of rice hull and 2-6 parts of microbial agent. The fertilizer is prepared by compounding oyster shells and various organic nutrient substances, contains biological nicotine, 16 amino acids and various medium and trace elements, has a 2-10 micron micro-porous structure, can neutralize soil acidity, passivate heavy metals, promote the propagation of beneficial microorganisms, and simultaneously promote the root development of crops, and has the functions of preserving water and fertilizer, increasing photosynthetic products, resisting drought, cold, resisting diseases and the like.)

1. The farmland heavy metal pollution repairing agent comprises a soil repairing agent and is characterized in that the soil repairing agent is prepared from the following raw materials in parts by weight: 20-30 parts of oyster shell, 10-20 parts of organic fertilizer, 13-17 parts of inorganic fertilizer, 7-10 parts of straw, 8-12 parts of peanut shell, 6-9 parts of rice hull and 2-6 parts of microbial agent.

2. The farmland heavy metal pollution remediation agent of claim 1, wherein the soil remediation agent is prepared from the following raw materials in parts by weight: 22-28 parts of oyster shell, 12-18 parts of organic fertilizer, 14-16 parts of inorganic fertilizer, 8-9 parts of straw, 9-11 parts of peanut shell, 7-8 parts of rice hull and 3-5 parts of microbial agent.

3. The farmland heavy metal pollution remediation agent of claim 2, wherein the soil remediation agent is prepared from the following raw materials in parts by weight: 25 parts of oyster shell, 15 parts of organic fertilizer, 13 parts of inorganic fertilizer, 8.5 parts of straw, 10 parts of peanut shell, 7.5 parts of rice hull and 4 parts of microbial agent.

4. The farmland heavy metal pollution remediation agent of claim 3, wherein the organic fertilizer comprises equal parts by weight of livestock and poultry manure and kitchen waste; the inorganic fertilizer comprises one or more of urea, calcium magnesium phosphate, potassium chloride and ferrous sulfate in equal parts by weight; the microbial preparation comprises one or more of Acinetobacter thiobacillus, Micrococcus lactis, Escherichia coli, Vibrio desulforii, Pyrobacterium, Pseudomonas and Ralstonia sp.

5. The preparation method of the farmland heavy metal pollution remediation agent as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:

1) calcining 25 parts of oyster shell at 600-800 ℃ for 80-100 minutes, crushing and sieving with a 100-mesh sieve to obtain oyster shell powder;

2) adding 15 parts of organic fertilizer and 13 parts of inorganic fertilizer into 1000 parts of water, stirring for 10-15 minutes to obtain a mixed solution, adding oyster shell powder into the mixed solution, and stirring for 5-10 minutes to obtain a mixed solution A;

3) adding a pH regulator into the mixed solution A to enable the pH of the mixed solution A to be 7.5-8.5, and obtaining mixed solution B;

4) cutting and crushing 8.5 parts of straw, 10 parts of peanut shell and 7.5 parts of rice hull, adding the cut and crushed materials into 300 parts of soil, adding 100 parts of water and 4 parts of microbial preparation, stirring for 5-10 minutes, and then placing the mixture in a shade place for fermentation for 10-20 days to obtain sludge;

5) and pouring the sludge into the mixed solution B, and stirring for 5-10 minutes at 25-30 ℃ to obtain the farmland heavy metal pollution remediation agent.

6. The use method of the farmland heavy metal pollution remediation agent as claimed in any one of claims 1 to 4, which is characterized in that: the method is applied to farmland heavy metal contaminated soil remediation so as to reduce the content of heavy metals in the soil.

7. The application of the farmland heavy metal pollution remediation agent as claimed in any one of claims 1 to 4, wherein: according to the difference of the PH value of the soil, the heavy metal pollution remediation agent is uniformly scattered on the soil polluted by the heavy metal according to the proportion of 100-plus-200 kg/mu, and then the soil covering treatment is carried out while the soil is kept moist.

Technical Field

The invention relates to a soil remediation agent, in particular to a farmland heavy metal pollution remediation agent and a preparation method thereof.

Background

The heavy metal pollution of the soil mainly comes from long-term sewage irrigation and sludge application, and the long-term application of pesticides, fertilizers and agricultural plastic films containing lead, mercury, cadmium, arsenic and the like results in the enrichment of harmful heavy metals in the soil, and the soil degradation can be caused after the harmful heavy metals are accumulated to a certain degree, so that the yield and the quality of crops are reduced. At present, two methods for restoring soil polluted by heavy metals are provided, one is to change the existence form of the heavy metals in the soil and reduce the toxicity of the heavy metals, and the other is to remove the heavy metals in the soil. However, most of the existing soil restoration agents have low changing efficiency when the existing forms of heavy metals in soil are changed, and the soil restoration agents need to be applied for a long time, so that crops grow slowly in the soil restoration process.

Disclosure of Invention

The invention aims to provide a farmland heavy metal pollution remediation agent and a preparation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the farmland heavy metal pollution repairing agent comprises a soil repairing agent, wherein the soil repairing agent is prepared from the following raw materials in parts by weight: 20-30 parts of oyster shell, 10-20 parts of organic fertilizer, 13-17 parts of inorganic fertilizer, 7-10 parts of straw, 8-12 parts of peanut shell, 6-9 parts of rice hull and 2-6 parts of microbial agent.

As a further scheme of the invention: the soil remediation agent is prepared from the following raw materials in parts by weight: 22-28 parts of oyster shell, 12-18 parts of organic fertilizer, 14-16 parts of inorganic fertilizer, 8-9 parts of straw, 9-11 parts of peanut shell, 7-8 parts of rice hull and 3-5 parts of microbial agent.

As a still further scheme of the invention: the soil remediation agent is prepared from the following raw materials in parts by weight: 25 parts of oyster shell, 15 parts of organic fertilizer, 13 parts of inorganic fertilizer, 8.5 parts of straw, 10 parts of peanut shell, 7.5 parts of rice hull and 4 parts of microbial agent.

As a still further scheme of the invention: the organic fertilizer comprises livestock and poultry manure and kitchen waste in equal parts by weight; the inorganic fertilizer comprises one or more of urea, calcium magnesium phosphate, potassium chloride and ferrous sulfate in equal parts by weight; the microbial preparation comprises one or more of Acinetobacter thiobacillus, Micrococcus lactis, Escherichia coli, Vibrio desulforii, Pyrobacterium, Pseudomonas and Ralstonia sp.

As a still further scheme of the invention: the preparation method of the farmland heavy metal pollution remediation agent comprises the following steps:

1) calcining 25 parts of oyster shell at 600-800 ℃ for 80-100 minutes, crushing and sieving with a 100-mesh sieve to obtain oyster shell powder;

2) adding 15 parts of organic fertilizer and 13 parts of inorganic fertilizer into 1000 parts of water, stirring for 10-15 minutes to obtain a mixed solution, adding oyster shell powder into the mixed solution, and stirring for 5-10 minutes to obtain a mixed solution A;

3) adding a pH regulator into the mixed solution A to enable the pH of the mixed solution A to be 7.5-8.5, and obtaining mixed solution B;

4) cutting and crushing 8.5 parts of straw, 10 parts of peanut shell and 7.5 parts of rice hull, adding the cut and crushed materials into 300 parts of soil, adding 100 parts of water and 4 parts of microbial preparation, stirring for 5-10 minutes, and then placing the mixture in a shade place for fermentation for 10-20 days to obtain sludge;

5) and pouring the sludge into the mixed solution B, and stirring for 5-10 minutes at 25-30 ℃ to obtain the farmland heavy metal pollution remediation agent.

As a still further scheme of the invention: the application method of the farmland heavy metal pollution remediation agent is applied to remediation of farmland heavy metal polluted soil so as to reduce the content of heavy metals in the soil.

As a still further scheme of the invention: according to the application of the farmland heavy metal pollution remediation agent, the farmland heavy metal pollution remediation agent is uniformly scattered on heavy metal polluted soil according to the difference of the PH value of the soil, and then the soil covering treatment is carried out, and meanwhile, the soil is kept moist.

Compared with the prior art, the invention has the beneficial effects that: the invention is prepared by compounding oyster shell and various organic nutrient substances, contains biological nicotine, 16 amino acids and various medium and trace elements, and the oyster shell powder has a 2-10 micron microporosity structure, can neutralize soil acidity, passivate heavy metals and promote the propagation of beneficial microorganisms. Meanwhile, the fertilizer can promote the growth of crop roots, and has the functions of preserving water and fertilizer, increasing photosynthetic products, resisting drought, cold and diseases and the like.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to specific embodiments.