Mercury contaminated soil remediation agent and preparation method thereof

A soil remediation agent and mercury pollution technology, applied in the field of soil remediation, can solve problems such as threats to the quality and safety of crops, high mercury ion content, harm to human health, etc., to improve the immobilization effect and stabilization effect, promote precipitation, and promote growth. developmental effects

Inactive Publication Date: 2019-06-07
贵州净界科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the mercury ion content in the soil is too high, which seriously threatens the quality and safety of crops and enters the human body through the food chain, seriously endangering the health of the human body, the purpose of the present

Method used

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  • Mercury contaminated soil remediation agent and preparation method thereof
  • Mercury contaminated soil remediation agent and preparation method thereof
  • Mercury contaminated soil remediation agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The mercury-contaminated soil remediation agent provided in this embodiment comprises 20-30 parts of diopside, 3-8 parts of sodium dimethylthiocarbamate, 10-18 parts of lime, 15-25 parts of chitosan, 5-10 parts of sodium thiosulfate, 10-22 parts of sepiolite, 8-15 parts of pig manure, 5-10 parts of plant ash and 4-8 parts of pig bone ash.

[0033] In this embodiment, diopside is used as the main component of the mercury-contaminated soil remediation agent, and sodium dimethylthiocarbamate is used as an organic synthesis intermediate, which has a stabilizing effect and can strengthen the immobilization of mercury ions by diopside effect and stabilization; lime, chitosan, sodium thiosulfate and sepiolite are used as auxiliary agents to further improve the immobilization and stabilization of mercury-contaminated soil remediation agents to mercury ions; pig manure, plant ash and pig manure The ashes can increase the organic matter in the soil, and then improve the soil's fe...

Embodiment 2

[0051] The difference between the mercury-contaminated soil remediation agent provided in this example and Example 1 lies in that the content range of each component is reduced compared with Example 1.

[0052] The mercury-contaminated soil remediation agent provided in this embodiment comprises 22 to 28 parts of diopside, 3 to 7 parts of sodium dimethylthiocarbamate, 12 to 18 parts of lime, 15 to 23 parts by weight. chitosan, 5-8 parts of sodium thiosulfate, 10-20 parts of sepiolite, 8-13 parts of pig manure, 5-9 parts of plant ash and 4-6.5 parts of pig bone ash.

Embodiment 3

[0054] The difference between the mercury-contaminated soil remediation agent provided in this example and the second example is that the value ranges of the contents of each component are continuously reduced.

[0055] The mercury-contaminated soil remediation agent provided in this embodiment comprises 23-26 parts of diopside, 4-6 parts of sodium dimethylthiocarbamate, 14-18 parts of lime, 18-23 parts of Chitosan, 5-6.8 parts of sodium thiosulfate, 12-18 parts of sepiolite, 9-12.5 parts of pig manure, 6-9 parts of plant ash and 4-6 parts of pig bone ash.

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Abstract

The invention belongs to the technical field of soil remediation, and discloses a mercury contaminated soil remediation agent and a preparation method thereof. The mercury-contaminated soil remediation agent comprises 20-30 parts of diopside, 3-8 parts of sodium dimethyl thiocarbamate, 10-18 parts of lime, 15-25 parts of chitosan, 5-10 parts of sodium thiosulfate, 10-22 parts of sepiolite, 8-15 parts of pig manure, 5-10 parts of plant ash and 4-8 parts of pig bone ash. According to the invention, the diopside and the sodium dimethyl thiocarbamate are cooperatively used to fix and stabilize mercury in soil, and the lime, the chitosan, the sodium thiosulfate, the sepiolite, the pig manure, the plant ash and the pig bone ash are used for auxiliary, so that the concentration of mercury in thesoil can be reduced to meet the mass standard concentration in national second-stage soil, organic matter in the soil can be improved, the fertilizer retention capability of the soil is improved, andthe advantage of good soil remediation effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a mercury-contaminated soil remediation agent and a preparation method thereof. Background technique [0002] In recent years, due to the intensification of human survival activities, mining, urbanization, transportation, pasture irrigation, sludge agricultural use and the application of chemical fertilizers, the content of trace metal elements in the soil exceeds the standard value, and excessive deposition And cause the content to be too high, and then cause the heavy metal pollution of soil. Soil heavy metal pollution contains excessive Hg, Cd, Pb, Zn and As. [0003] Mercury is a non-essential toxic heavy metal for the human body. Mercury in nature enters the soil in the form of ions. When mercury ions enter the soil, accumulate in the soil and exceed the safe range, it will directly threaten the quality and safety of crops. Mercury ions will also enter...

Claims

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Application Information

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IPC IPC(8): C09K17/40
Inventor 秦凯宁红创孔维轩
Owner 贵州净界科技有限公司
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