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Regulating agent suitable for heavy metal cadmium pollution remediation of alkaline soil, preparation method and application

A technology of heavy metals and regulators, applied in soil conditioning materials, restoration and application of polluted soil, etc., can solve the problem of inability to meet the remediation needs of cadmium pollution in alkaline soils, inability to adapt to water and fertilizer management measures, and ineffective passivation remediation effects, etc. problem, to achieve the effect of ingenious and reasonable product formula design, significant control effect and low price

Inactive Publication Date: 2021-08-10
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Passivation restoration technology has been widely used in the restoration and treatment of heavy metal cadmium-contaminated farmland soil due to its simple operation, good restoration effect, fast restoration speed, strong stability, low cost, and production while restoration. It shows that regulators with good remediation effect in southern acidic cadmium-contaminated rice fields, such as: silicon-calcium materials, clay materials, phosphorus-containing materials, biochar, metal oxides, organic materials, many materials in northern alkaline cadmium-contaminated soils The remediation effect of medium passivation is not obvious, and there are few regulators that can meet the needs of remediation and treatment of alkaline cadmium-contaminated soil in the north; in addition, water and fertilizer management measures cannot be adapted to crop production in dry land in the north, and the barrier effect of foliar spraying conditioners is low and stable. Poor performance, generally low effect of farming measures, only as an auxiliary measure, super-accumulator plant extraction and restoration of cadmium pollution in northern alkaline soil, due to low extraction efficiency and long restoration time, also cannot meet the demand for restoration of alkaline soil cadmium pollution

Method used

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  • Regulating agent suitable for heavy metal cadmium pollution remediation of alkaline soil, preparation method and application
  • Regulating agent suitable for heavy metal cadmium pollution remediation of alkaline soil, preparation method and application
  • Regulating agent suitable for heavy metal cadmium pollution remediation of alkaline soil, preparation method and application

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preparation example Construction

[0047] A method for preparing a regulating agent suitable for remediation of heavy metal cadmium pollution in alkaline soil as described above, the steps are as follows:

[0048] After uniformly mixing calcined skarn powder, blue iron ore powder, zinc sulfate and manganese salt, a regulator suitable for remediation of heavy metal cadmium pollution in alkaline soil is obtained.

[0049] As mentioned above, the method for using the regulating agent suitable for the remediation of heavy metal cadmium pollution in alkaline soil, the steps are as follows:

[0050] The regulating agent is directly sprinkled on the alkaline soil polluted by heavy metal cadmium according to the mass ratio of regulating agent: heavy metal cadmium-contaminated soil in the ratio of 1:200 to 1:500, and it can be sown after plowing evenly.

[0051] The application of the above-mentioned regulating agent suitable for remediation of heavy metal cadmium pollution in alkaline soil in regulating heavy metal cad...

Embodiment 1

[0056] Embodiment 1 regulator preparation:

[0057] Weigh an appropriate amount of the above-mentioned skarn powder material, put it in a crucible, put it into a muffle furnace, and start heating at a heating rate of 10°C / min. When the temperature of the muffle furnace is raised to 900°C, keep the temperature for 2 hours. After cooling, the calcined skarn powder material is obtained, which is ground and sieved to obtain a median particle size of 5-10 μm, and the maximum content of particles with a particle size greater than 30 μm is not more than 0.1% of the sample is reserved. The calcined skarn powder material is mixed with zinc sulfate and manganese salt in a certain mass ratio, and is stirred with a mixer for more than 5 minutes to ensure uniform mixing, and is prepared as regulator 1#.

Embodiment 2

[0058] Embodiment 2 regulator preparation:

[0059] After the blue iron ore material is pulverized by a high-speed pulverizer, it is sieved to obtain a sample with a median particle size of 5-10 μm and a maximum content of particles with a particle size greater than 30 μm of no more than 0.1%. The blue iron ore powder material is mixed with a certain mass ratio Mix with zinc sulfate and manganese salt, and use a mixer to stir for more than 5 minutes to ensure uniform mixing, and prepare regulator 3#.

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Abstract

The invention relates to a regulating agent suitable for heavy metal cadmium pollution remediation of alkaline soil. The regulating agent is prepared from calcined skarn powder, blue iron ore powder, zinc sulfate and manganese salt. The regulating agent is wide in raw material source, low in price, low in application amount, simple in application method, ingenious and reasonable in product formula design, remarkable in regulation and control effect and the like, can be used for efficient remediation of heavy metal cadmium pollution of alkaline soil, can effectively control heavy metal cadmium pollution of alkaline soil in northern China, and guarantees safe production of agricultural products. The regulating agent and the soil polluted by the heavy metal cadmium are directly spread into the alkaline soil polluted by the heavy metal cadmium according to the mass ratio of (1: 200)-(1: 500), the soil is turned over evenly, and then sowing can be conducted.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal pollution in soil, in particular to a regulator, preparation method and application suitable for remediation of heavy metal cadmium pollution in alkaline soil. Background technique [0002] In the past 30 years, with the rapid development of industrialization and urbanization in my country, the problem of soil heavy metal pollution has become more and more prominent. The exceeding standard rate was 19.4%, among which the point exceeding standard rate of heavy metal cadmium reached 7.0%, ranking first among the eight heavy metal elements, and has attracted widespread attention from the whole society. Cadmium is considered to be the most toxic heavy metal to human health. It will damage the kidney function of the human body, make the bone fragile, cause bone pain in the human body, and increase the carcinogenicity of the human body, causing kidney cancer, bladder cancer, breast can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06B09C1/00B09C1/08C05G3/80C09K101/00C09K109/00
CPCB09C1/00B09C1/08B09C2101/00C05D3/02C09K17/06C09K2101/00C09K2109/00C05G3/80C05D9/02
Inventor 徐应明王雅乐黄青青孙约兵王林
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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