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A kind of heavy metal remediation agent for soil and preparation method thereof

A technology for heavy metals and remediation agents, applied in the field of soil remediation, can solve problems such as low remediation efficiency, and achieve the effects of improving porosity and specific surface area, maintaining adsorption performance, and improving complexation and fixation performance.

Active Publication Date: 2021-02-09
峰景园林工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the defects of low remediation efficiency of heavy metal remediation agents for ordinary soil, soil remediation agents need to be improved in terms of efficiently reducing heavy metal content in soil

Method used

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  • A kind of heavy metal remediation agent for soil and preparation method thereof
  • A kind of heavy metal remediation agent for soil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of heavy metal remediation agent for soil, its preparation method comprises the following steps:

[0023] (1) Add 27 parts of montmorillonite and 39.5 parts of ethylenediaminetetraacetic acid into the hydrothermal reactor, maintain the system temperature at 209°C for 3.5 hours, add 28.7 parts of thioglycolic acid into the hydrothermal reactor, and maintain The hydrothermal reaction temperature was 121°C for 2.5 hours, 26.3 parts of ethylenediamine was added to the hydrothermal reaction kettle, the hydrothermal reaction temperature was maintained at 86°C for 45 minutes, and the hydrothermal reaction temperature was raised to 203°C After reacting for 1.5h, the product was ultrasonically washed 3 times with 500mL ethanol and dried to obtain modified montmorillonite;

[0024] (2) Add 38 parts of activated carbon, 18 parts of hydrogen peroxide and 9.8 parts of concentrated nitric acid into the hydrothermal reaction kettle, and keep the hydrothermal reaction temperatur...

Embodiment 2

[0029] A kind of heavy metal remediation agent for soil, its preparation method comprises the following steps:

[0030](1) Add 27 parts of montmorillonite and 37 parts of ethylenediaminetetraacetic acid into the hydrothermal reaction kettle, maintain the system temperature at 196°C for 4 hours, add 25 parts of thioglycolic acid into the hydrothermal reaction kettle, and maintain the water The thermal reaction temperature is 103°C for 3 hours, add 21 parts of ethylenediamine to the hydrothermal reaction kettle, maintain the hydrothermal reaction temperature at 73°C for 45 minutes, and raise the hydrothermal reaction temperature to 187°C for 2 hours , the product was ultrasonically washed 3 times with 500 mL of ethanol, and dried to obtain modified montmorillonite;

[0031] (2) Add 38 parts of activated carbon, 12 parts of hydrogen peroxide and 8 parts of concentrated nitric acid into the hydrothermal reaction kettle, and keep the hydrothermal reaction temperature at 87°C for 2 ...

Embodiment 3

[0036] A kind of heavy metal remediation agent for soil, its preparation method comprises the following steps:

[0037] (1) Add 27 parts of montmorillonite and 43 parts of ethylenediaminetetraacetic acid into the hydrothermal reaction kettle, maintain the system temperature at 217°C for 1 hour, add 34 parts of thioglycolic acid into the hydrothermal reaction kettle, and maintain the water The thermal reaction temperature is 128°C for 1 hour, add 30 parts of ethylenediamine to the hydrothermal reaction kettle, maintain the hydrothermal reaction temperature at 90°C for 45 minutes, and raise the hydrothermal reaction temperature to 210°C for 0.5 h, the product was ultrasonically washed 3 times with 500 mL of ethanol, and dried to obtain modified montmorillonite;

[0038] (2) Add 38 parts of activated carbon, 21 parts of hydrogen peroxide and 17 parts of concentrated nitric acid into the hydrothermal reaction kettle, and keep the hydrothermal reaction temperature at 103°C for 0.5h...

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Abstract

The invention relates to a heavy metal restoration agent for soil and a preparation method thereof. The heavy metal remediation agent for soil is composed of modified porous ferric oxide, modified activated carbon and modified montmorillonite, and the modified porous ferric oxide is composed of porous ferric oxide, ethylenediaminetetraacetic acid and mercapto Prepared by ethanol reaction, the porous ferric ferric oxide is prepared by the reaction of ferric sulfate, urea, water, iron powder, ethylenediaminetetraacetic acid, paraformaldehyde, oxalic acid, KH-550 coupling agent and ethanol, the modified Activated carbon is prepared by the reaction of activated carbon, hydrogen peroxide, concentrated nitric acid, ethylenediaminetetraacetic acid and 12-mercaptododecanoic acid, and the modified montmorillonite is made of montmorillonite, ethylenediaminetetraacetic acid, thioglycolic acid and ethylenediamine The reaction is made. The heavy metal remediation agent for soil provided by the invention has excellent performance in reducing the content of heavy metal ions in soil.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to a heavy metal remediation agent for soil and a preparation method thereof. Background technique [0002] With the rapid development of social economy and the abuse of chemical fertilizers and pesticides, it is urgent to solve the problem of heavy metal pollution in soil. Therefore, the research on reducing the content of heavy metals in polluted soil has gradually become a hot spot for researchers in different fields. Due to the low repair efficiency of ordinary soil remediation agents, soil remediation agents need to be improved in terms of efficiently reducing heavy metal content in soil. Contents of the invention [0003] The object of the present invention is to provide a heavy metal remediation agent for soil, which is prepared by using modified porous iron tetroxide, modified activated carbon and modified montmorillonite, which has an excellent ability to reduce the conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 刘超林振桓王明明代彦霞陈云
Owner 峰景园林工程集团有限公司
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