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Remediation agent for heavy metal industrial contaminated site and remediation method thereof

A technology for repairing chemicals and heavy metals, applied in the restoration of contaminated soil, chemical instruments and methods, agriculture, etc., can solve problems such as small scope of application, monotonous and fixed formula, and lack of standardized operating procedures, so as to improve the repair effect and improve the restoration efficiency. Efficiency, the effect of expanding the scope of application

Inactive Publication Date: 2021-04-02
江西省三汇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The existing repair agents have a monotonous and fixed formula and a small scope of application, resulting in poor actual repair effects and even prone to secondary pollution;
[0005] 2. When using remediation agents, the relevant operation procedures are lack of standardization, resulting in a low degree of combination between the remediation agents and the soil, resulting in poor restoration effect

Method used

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  • Remediation agent for heavy metal industrial contaminated site and remediation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A remediation agent for heavy metal industrial contaminated sites, including 60% of agent a, 20% of agent b and 20% of agent c,

[0025] The mass components of the agent a are as follows: 30 parts of inorganic alkaline substances, 40 parts of fly ash;

[0026] Wherein, the inorganic alkaline substance is any one or more of limestone, quicklime, soda ash, caustic soda, magnesium oxide, magnesium hydroxide, cement, and industrial composite alkali.

[0027] The mass components of agent b are as follows: 30 parts of phosphates (calcium hydrogen phosphate), 30 parts of calcium polysulfide, 20 parts of dithiocarbamate-based salts, 12 parts of humic acid, 5 parts of molasses, iron manganese oxide 8 copies;

[0028] Among them, any one or more of calcium hydrogen phosphate, trisodium phosphate, sodium dihydrogen phosphate, tripotassium phosphate, and potassium dihydrogen phosphate is used as the phosphate.

[0029] The mass components of the agent c are as follows: 20 parts o...

Embodiment 2

[0036] A remediation agent for heavy metal industrial contaminated sites, including 70% of agent a, 15% of agent b and 15% of agent c,

[0037] The mass components of the agent a are as follows: 35 parts of inorganic alkaline substances, 45 parts of fly ash;

[0038] Wherein, the inorganic alkaline substance is any one or more of limestone, quicklime, soda ash, caustic soda, magnesium oxide, magnesium hydroxide, cement, and industrial composite alkali.

[0039] The mass components of agent b are as follows: 25 parts of phosphates (calcium hydrogen phosphate), 5 parts of calcium polysulfide, 15 parts of dithiocarbamate salts, 10 parts of humic acid, 4 parts of molasses, iron manganese oxide 7 copies;

[0040] Among them, any one or more of calcium hydrogen phosphate, trisodium phosphate, sodium dihydrogen phosphate, tripotassium phosphate, and potassium dihydrogen phosphate is used as the phosphate.

[0041] The mass components of the agent c are as follows: 15 parts of diato...

Embodiment 3

[0048] A remediation agent for heavy metal industrial contaminated sites, including 80% of agent a, 10% of agent b and 10% of agent c,

[0049] The mass components of the agent a are as follows: 40 parts of inorganic alkaline substances, 50 parts of fly ash;

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Abstract

The invention relates to the technical field of heavy metal pollution remediation, in particular to a remediation agent for a heavy metal industrial contaminated site and a remediation method thereof.The remediation agent comprises 60%-80% of an agent a, 10%-20% of an agent b and 10%-20% of an agent c. The agent a is prepared from the following components by mass: 30-40 parts of inorganic alkaline matter and 40-50 parts of coal ash. The method comprises the following steps: A, separation; B, drilling; C, repairing; and D, inspection. According to the method, the application range is expanded,targeted adjustment can be conducted according to the actual pollution situation, secondary pollution is avoided, and therefore the remediation effect on the heavy metal industrial pollution site iseffectively improved; and by ditching and arranging separation walls, remediation agents of different proportions are injected into pile holes drilled at equal intervals, omnibearing permeation and restoration are carried out on a soil layer of the contaminated site, and finally an optimal formula is obtained through inspection and trial and error, so that the restoration efficiency of the heavy metal industrial contaminated site is further improved.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution, in particular to a remediation agent for heavy metal industrially polluted sites and a remediation method thereof. Background technique [0002] Heavy metal pollution is the most common form of soil pollution in many industrial sites, and it has the characteristics of concealment, long-term, and accumulation. Among them, heavy metals are commonly cadmium (Cd), mercury (Hg), arsenic (As), chromium (Cr )Wait. At present, for the remediation of heavy metal-contaminated sites, the solidification and stabilization technology is mainly used, that is, by adding remediation agents to the contaminated soil to reduce the migration and diffusion of heavy metals in the soil, and finally through the leaching concentration of heavy metals in the remediated soil samples The actual repair quality can be obtained through detection and comparison. [0003] However, there are still so...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/00C09K17/40G01N33/24
CPCB09C1/08B09C1/00C09K17/40G01N33/24B09C2101/00
Inventor 陈宝奇姚宇航陈奕好李孜
Owner 江西省三汇科技有限公司
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