Heavy metal polluted soil treatment processing agent and preparation method thereof

A technology of contaminated soil and treatment agent, which is applied in the field of treatment agent and its preparation for heavy metal-contaminated soil, can solve the problems of unsatisfactory treatment effect and long treatment cycle, and achieve the goal of increasing utilization rate, reducing preparation cost and being easy to realize Effect

Active Publication Date: 2015-05-13
山东金鼎环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special combination state of heavy metals and soil, it is difficult for general heavy metal chelating agents to diffuse in the soil evenly, resulting in a situation where the treatment effect is not ideal.
The combination of chemical and biological treatment methods has the best treatment effect, but requires a long treatment cycle. How to thoroughly control heavy metal pollution in soil in a relatively short period of time is currently the most cutting-edge research topic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An improvement of the treatment agent for treating heavy metal-contaminated soil provided by the present embodiment, in terms of mass percentage, includes the following components:

[0038] Sodium dimethyl dithiocarbamate chelating agent 60%;

[0039] Sodium diethyldithiocarbamate chelating agent 30%;

[0040] Polyethyleneimine 10%.

[0041] Its preparation method is:

[0042] Include the following steps:

[0043] In the first step, liquid dimethylamine is added to ethylenediamine to make a mixture of ethylenediamine and dimethylamine, wherein the molar ratio of ethylenediamine and dimethylamine is 1:3;

[0044] In the second step, a sufficient amount of carbon disulfide is added to the mixture of ethylenediamine and dimethylamine obtained in the first step, so that ethylenediamine and dimethylamine react with carbon disulfide respectively, and the reaction temperature is controlled below 10°C to obtain the intermediate product;

[0045] The 3rd step, in intermediate...

Embodiment 2

[0048] An improvement of the treatment agent for treating heavy metal-contaminated soil provided by the present embodiment, in terms of mass percentage, includes the following components:

[0049] Potassium Dimethyl Dithiocarbamate Chelating Agent 52%;

[0050] Potassium diethyldithiocarbamate chelating agent 40%;

[0051] Polyethyleneimine 8%.

[0052] Its preparation method is:

[0053] Include the following steps:

[0054] In the first step, liquid dimethylamine is added to ethylenediamine to make a mixture of ethylenediamine and dimethylamine, wherein the molar ratio of ethylenediamine and dimethylamine is 1:2;

[0055] In the second step, a sufficient amount of carbon disulfide is added to the mixture of ethylenediamine and dimethylamine obtained in the first step, so that ethylenediamine and dimethylamine react with carbon disulfide respectively, and the reaction temperature is controlled below 10°C to obtain the intermediate product;

[0056] The 3rd step, in inter...

Embodiment 3

[0059] An improvement of the treatment agent for treating heavy metal-contaminated soil provided by the present embodiment, in terms of mass percentage, includes the following components:

[0060] Iron dimethyl dithiocarbamate chelating agent 63%;

[0061] Iron diethyldithiocarbamate chelating agent 25%;

[0062] Polyethyleneimine 12%.

[0063] Its preparation method is:

[0064] Include the following steps:

[0065] In the first step, liquid dimethylamine is added to ethylenediamine to make a mixture of ethylenediamine and dimethylamine, wherein the molar ratio of ethylenediamine and dimethylamine is 1:4;

[0066] In the second step, a sufficient amount of carbon disulfide is added to the mixture of ethylenediamine and dimethylamine obtained in the first step, so that ethylenediamine and dimethylamine react with carbon disulfide respectively, and the reaction temperature is controlled below 10°C to obtain the intermediate product;

[0067] The third step is to add ferric...

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PUM

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Abstract

The invention belongs to the processing agent technical field, and in particular relates to a heavy metal polluted soil treatment processing agent comprising the following components by mass: 40%-75% of dimethyl dithiocarbamate chelating agent; 20%-45% of diethyl dithiocarbamate chelating agent and 5%-15% of polyethylene imine. Compared with the existing technology, the dimethyl dithiocarbamate chelating agent can effectively fix soil heavy metal ions, and due to the biological activity of the diethyl dithiocarbamate chelating agent, the heavy metal polluted soil treatment processing agent can promote crop absorption of heavy metal ions, that is to say, the heavy metal polluted soil treatment processing agent both has the properties of heavy metal ion fixing and crop absorption of heavy metal ions, so that the treatment process of soil heavy metal ion pollution can be speeded up, and the heavy metal polluted soil treatment processing agent can thoroughly treat soil heavy metal pollution in a short period of time.

Description

technical field [0001] The invention belongs to the technical field of treatment agents, in particular to a treatment agent for treating heavy metal polluted soil and a preparation method thereof. Background technique [0002] With the continuous development of industry, heavy metals not only pollute the water body, but also pollute the soil more and more seriously, and the pollution of the land in some areas has seriously exceeded the standard. Soil pollution will cause the crops planted on it to inhale these heavy metals, resulting in excessive heavy metals in the crops, which will seriously affect people's food safety and health. The ultimate victim of soil pollution is human beings. The continuous pollution of heavy metals to soil and the long-term existence of pollutants in soil will definitely pose a huge, serious and potential threat to human life safety. Therefore, people pay more and more attention to soil management. [0003] General heavy metal ions are combined...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/18B09C1/08
Inventor 李纪文段会伟张斌张哲
Owner 山东金鼎环保科技有限公司
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