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A high-efficiency reduction and repair agent for heavy metal polluted soil and its repair process

A technology of polluted soil and remediation agents, applied in the restoration of polluted soil, soil conditioning materials, agriculture, etc., can solve the problems of cumbersome soil heavy metal treatment process steps, affecting the efficiency of soil heavy metal treatment, and not suitable for large-scale promotion , to achieve the effect of reducing the content of heavy metal ions, reducing the toxic effect and prolonging the effective time

Inactive Publication Date: 2019-04-23
CHINESE ACADEMY FOR ENVIRONMENTAL PLANNING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The composition of the existing soil treatment agents is unreasonable. After the existing agents are applied for a period of time, the heavy metal ions that have been reduced will be oxidized to a high price due to the oxidation of the air. Among them, the six most harmful to the soil are Chromium ions and pentavalent arsenic ions, the high concentration of these two ions will seriously affect the health of the soil, and the existing soil heavy metal treatment process steps are cumbersome, the implementation cost is too high, it is not suitable for large-scale promotion, and affects Efficiency of soil heavy metal treatment

Method used

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  • A high-efficiency reduction and repair agent for heavy metal polluted soil and its repair process

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Effect test

Embodiment 1

[0025] The present invention provides a technical solution: a high-efficiency reduction and restoration agent for heavy metal polluted soil, comprising the following components by weight: 10 parts of nanometer zero-valent iron, 6 parts of ferrous sulfate, 7 parts of calcium polysulfide, 3 parts of hematite, iron 5 parts of powder, 1 part of sodium sulfide, 4 parts of deacetylated chitin, 6 parts of ferric chloride, 12 parts of microbial combination agent, and 90 parts of compound dissolving agent.

[0026] Wherein the microbial composition comprises the following components by weight: 3 parts of bacillus, 4 parts of white rot fungus, 5 parts of Gordonia ditch; the composite dissolving agent comprises the following components by weight: 60 parts of water, 12 parts of ammonium bicarbonate, calcium phosphate 10 parts, potassium sulfate 8 parts.

[0027] A soil heavy metal restoration process, comprising the following steps:

[0028] S1: Weigh the ratio, weigh the raw materials o...

Embodiment 2

[0034] The present invention provides a technical solution: a high-efficiency reduction and repair agent for heavy metal polluted soil, comprising the following components by weight: 15 parts of nanometer zero-valent iron, 21 parts of ferrous sulfate, 13 parts of calcium polysulfide, 7 parts of hematite, iron 15 parts of powder, 2 parts of sodium sulfide, 8 parts of deacetylated chitin, 14 parts of ferric chloride, 18 parts of microbial combination agent, and 160 parts of compound dissolving agent.

[0035] Wherein the microbial combination agent comprises the following components by weight: 5 parts of bacillus, 6 parts of white rot fungi, 7 parts of Gordonia ditch; the composite dissolving agent comprises the following components by weight: 102 parts of water, 28 parts of ammonium bicarbonate, calcium phosphate 17 parts, potassium sulfate 13 parts.

[0036] A soil heavy metal restoration process, comprising the following steps:

[0037] S1: Weigh the ratio, weigh the raw mat...

Embodiment 3

[0043] The present invention provides a technical solution: a high-efficiency reduction and repair agent for heavy metal polluted soil, comprising the following components by weight: 17 parts of nanometer zero-valent iron, 26 parts of ferrous sulfate, 17 parts of calcium polysulfide, 9 parts of hematite, iron 19 parts of powder, 3 parts of sodium sulfide, 11 parts of deacetylated chitin, 16 parts of ferric chloride, 28 parts of microbial combination agent, and 180 parts of compound dissolving agent.

[0044] Wherein the microbial composition comprises the following components by weight: 7 parts of bacillus, 10 parts of white rot fungus, 11 parts of Gordonia ditch; the composite dissolving agent comprises the following components by weight: 112 parts of water, 30 parts of ammonium bicarbonate, 20 parts of calcium phosphate Parts, 18 parts of potassium sulfate.

[0045] A soil heavy metal restoration process, comprising the following steps:

[0046] S1: Weigh the ratio, weigh t...

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Abstract

The invention discloses a high-efficiency reductive restoration reagent for heavy metal-contaminated soil. The high-efficiency reductive restoration reagent comprises, by weight, 8 to 18 parts of nanometer zero-valent iron, 5 to 26 parts of ferrous sulfate, 3 to 17 parts of calcium polysulfide, 2 to 9 parts of hematite, 5 to 19 parts of iron powder, 1 to 3 parts of sodium sulfide, 3 to 11 parts of deacetyl chitin, 2 to 16 parts of iron chloride, 9 to 38 parts of a microbial compound and 50 to 180 parts of a composite solvent. The invention discloses a restoration process for the heavy metal-contaminated soil. The process comprises the following steps: S1, weighing and proportioning; S2, preliminary turning of soil; S3, crushing of the soil; S4, stirring of the solvent; and S5, sowing of the solvent. The reagent is reasonable in formula, more scientific in process and capable of reducing the content of high-valent heavy metal ions in soil.

Description

technical field [0001] The invention relates to the field of soil heavy metal restoration, in particular to a high-efficiency reduction restoration agent for heavy metal polluted soil and a restoration process thereof. Background technique [0002] The composition of the existing soil treatment agents is unreasonable. After the existing agents are applied for a period of time, the heavy metal ions that have been reduced will be oxidized to a high price due to the oxidation of the air. Among them, the six most harmful to the soil are Chromium ions and pentavalent arsenic ions, the high concentration of these two ions will seriously affect the health of the soil, and the existing soil heavy metal treatment process steps are cumbersome, the implementation cost is too high, and it is not suitable for large-scale promotion. Efficiency of soil heavy metal treatment. Contents of the invention [0003] The object of the present invention is to provide a high-efficiency reduction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/10
CPCB09C1/10C09K17/40
Inventor 丁贞玉朱高峰
Owner CHINESE ACADEMY FOR ENVIRONMENTAL PLANNING
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