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A kind of heavy metal polluted soil remediation agent and application thereof

A soil remediation agent and a technology for polluted soil, which are applied to heavy metal contaminated soil remediation agents and their application fields, can solve problems such as complex preparation methods of the remediation agent, and achieve the effects of realizing resource utilization, low price, and reducing environmental pressure.

Active Publication Date: 2020-07-10
SHANGHAI LICHANG ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the restoration agent is more complicated

Method used

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  • A kind of heavy metal polluted soil remediation agent and application thereof
  • A kind of heavy metal polluted soil remediation agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A heavy metal contaminated soil remediation agent is prepared by the following method:

[0035] Take 50 parts of alkali sulfide slag and 50 parts of waste clay, grind them through a 100-mesh sieve, mix them, and cure them for 10 days. After grinding through a 100-mesh sieve, a heavy metal-contaminated soil remediation agent is obtained. Among them, the moisture content of alkali sulfide slag is 26%, and the moisture content of waste clay is 11%.

Embodiment 2

[0040] A heavy metal contaminated soil remediation agent is prepared by the following method:

[0041] Take 80 parts of alkali sulfide slag and 20 parts of waste clay, grind them through a 100-mesh sieve, mix them, and cure them for 15 days. After grinding through a 100-mesh sieve, a heavy metal-contaminated soil remediation agent is obtained. Among them, the moisture content of alkali sulfide slag is 23%, and the moisture content of waste clay is 12%.

Embodiment 3

[0046] A heavy metal contaminated soil remediation agent is prepared by the following method:

[0047] Take 50 parts of alkali sulfide slag and 50 parts of waste clay, grind them through a 100-mesh sieve, mix them, and cure them for 13 days. After grinding through a 100-mesh sieve, a heavy metal-contaminated soil remediation agent is obtained. Among them, the moisture content of alkali sulfide slag is 23%, and the moisture content of waste clay is 11%.

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Abstract

The invention discloses a heavy metal contaminated soil remediating agent and application thereof to remediation of heavy metal contaminated soil remediating agent. The raw material prescription of the heavy metal contaminated soil remediating agent comprises the following components of, by weight, 50-80 parts of sulfurized alkali residues and 20-50 parts of spent bleaching clay. A preparation method of the soil remediating agent disclosed by the invention comprises the following steps of: firstly uniformly mixing raw materials according to the proportion of the prescription and subsequently carrying out sealed temperature keeping maintenance, wherein the temperature keeping maintenance is carried out at the temperature of 90-180 DEG C for 7-15 days. Compared with an existing remediating agent, the remediating agent disclosed by the invention has an obvious cost advantage; the adopted raw materials all are industrial production wastes and are low in cost; meanwhile resource utilizationof solid wastes is realized; the pressure on environment is reduced; and the heavy metal contaminated soil remediating agent is efficient and also economical.

Description

technical field [0001] The invention relates to a restoration method specially aimed at soil polluted by heavy metals. Background technique [0002] With the massive development and utilization of mineral resources, the rapid development of industrial production and the widespread use of various chemical products, pesticides and fertilizers, pollutants containing heavy metals enter the soil environment through various channels, resulting in increasingly serious soil heavy metal pollution. Through the statistical analysis of the concentration of Cr, Cu, Pb, Zn, Ni, Cd, Hg and As in the farmland soil of 8 cities in my country, the heavy metal content in most cities is higher than its soil background value. According to the land survey of 24 provinces and cities nationwide by the Key Laboratory of Agricultural Product Pollution Prevention and Control of the Ministry of Agriculture, there are 320 seriously polluted areas, about 548×104hm 2 , agricultural products with excessive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 赵粉红谢爱军高素萍常立
Owner SHANGHAI LICHANG ENVIRONMENTAL ENG
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