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Heavy metal polluted soil remediation agent, and preparation method and application thereof

A technology for contaminated soil and heavy metals, applied in the field of heavy metal-contaminated soil remediation agents, can solve problems such as structural damage, high treatment costs, and soil secondary pollution, and achieve the effect of low cost and easy availability of raw materials

Inactive Publication Date: 2018-01-26
上海前引科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The treatment of heavy metal pollution in soil, including engineering treatment, chemical treatment and plant ecological restoration, generally has problems such as low restoration efficiency and high treatment costs, and it will also lead to secondary pollution of soil, structural damage and loss of certain elements. There are technical deficiencies, so a heavy metal-contaminated soil remediation agent is invented, which has the beneficial effect of effectively transforming heavy metals such as lead, cadmium, mercury, arsenic, and chromium in the soil through ion exchange to achieve the purpose of soil remediation , easy to obtain raw materials, low cost, and can be mass-produced in a factory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The present embodiment is a kind of heavy metal contaminated soil remediation agent, which is characterized in that it is composed of the following raw materials in parts by mass: 25 parts of zeolite powder, 20 parts of montmorillonite powder, 35 parts of attapulgite, 10 parts of diatomite, and 100 parts of rice husk powder , 2 parts of chitosan, 2 parts of citric acid, 0.5 part of zinc sulfide, 0.5 part of selenium powder, and 1 part of negative ion powder.

[0015] The preparation method of a heavy metal contaminated soil remediation agent described in this embodiment is characterized in that it comprises the following steps:

[0016] (1) Chitosan, citric acid, zinc sulfide, selenium powder, and negative ion powder were added to a speed-adjustable mixer and stirred at high speed for 30 minutes to make a mixture;

[0017] (2) adding the obtained mixture and rice husk powder into a speed-adjusting mixer and stirring at a medium speed for 30 minutes to make the mixture; ...

Embodiment 2

[0021] The present embodiment is a kind of heavy metal contaminated soil remediation agent, which is characterized in that it consists of the following raw materials in parts by mass: 28 parts of zeolite powder, 23 parts of montmorillonite powder, 38 parts of attapulgite, 12 parts of diatomite, and 95 parts of rice husk powder , 3 parts of chitosan, 3 parts of citric acid, 0.8 part of zinc sulfide, 0.8 part of selenium powder, 2 parts of negative ion powder.

[0022] The preparation method of a heavy metal contaminated soil remediation agent described in this embodiment is characterized in that it comprises the following steps:

[0023] (1) Chitosan, citric acid, zinc sulfide, selenium powder, and negative ion powder were added to a speed-adjustable mixer and stirred at high speed for 30 minutes to make a mixture;

[0024] (2) adding the obtained mixture and rice husk powder into a speed-adjusting mixer and stirring at a medium speed for 30 minutes to make the mixture;

[002...

Embodiment 3

[0028] The present embodiment is a kind of heavy metal contaminated soil remediation agent, which is characterized in that it is composed of the following raw materials in parts by mass: 30 parts of zeolite powder, 25 parts of montmorillonite powder, 38 parts of attapulgite, 12 parts of diatomite, and 90 parts of rice husk powder , 3 parts of chitosan, 3 parts of citric acid, 1 part of zinc sulfide, 1 part of selenium powder, 2 parts of negative ion powder.

[0029] The preparation method of a heavy metal contaminated soil remediation agent described in this embodiment is characterized in that it comprises the following steps:

[0030] (1) Add chitosan, citric acid, zinc sulfide, selenium powder, and negative ion powder into a speed-regulating mixer and stir at high speed for 35 minutes to make a mixture;

[0031] (2) Add the obtained mixture and rice husk powder into a speed-adjusting mixer and stir at a medium speed for 40 minutes to make the mixture;

[0032] (3) Add the o...

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Abstract

The invention provides a heavy metal polluted soil remediation agent, and a preparation method and an application thereof, and relates to the field of heavy metal polluted soil remediation. Treatmentof heavy metal pollution in soil includes engineering treatment, chemical treatment and plant ecological restoration, and has the disadvantages of low remediation efficiency, high treatment cost, secondary pollution to soil, structural damage of the soil, and loss of some elements in the soil. The heavy metal polluted soil remediation agent provided to overcome the disadvantages in the prior art comprises, by mass, 25-35 parts of zeolite powder, 20-30 parts of montmorillonite powder, 35-45 parts of attapulgite, 10-15 parts of diatomite, 80-100 parts of rice hull powder, 1-8 parts of chitosan,1-10 parts of citric acid, 0.5-2 parts of zinc sulfide, 0.5-2.5 parts of selenium powder and 1-3 parts of negative ion powder. The heavy metal polluted soil remediation agent can effectively convert lead, cadmium, mercury, arsenic, chromium and other heavy metals in the soil through an ion exchange method to achieve the purpose of soil remediation, and has the advantages of easily available raw materials, low cost, and realization of factory mass production.

Description

technical field [0001] The invention relates to the field of remediation of heavy metal polluted soil, in particular to a remediation agent for heavy metal polluted soil. technical background [0002] The treatment of heavy metal pollution in soil, including engineering treatment, chemical treatment and plant ecological restoration, generally has problems such as low restoration efficiency and high treatment costs, and it will also lead to secondary pollution of soil, structural damage and loss of certain elements. There are technical deficiencies, so a heavy metal-contaminated soil remediation agent is invented, which has the beneficial effect of effectively transforming heavy metals such as lead, cadmium, mercury, arsenic, and chromium in the soil through ion exchange to achieve the purpose of soil remediation , the raw material is easy to obtain, the cost is low, and it can be mass-produced in a factory. Contents of the invention [0003] The present invention aims at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
Inventor 朱德官
Owner 上海前引科技有限公司
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