A kind of heavy metal compound polluted soil remediation agent and its application

A soil remediation agent and composite pollution technology, which is applied in the field of heavy metal composite contaminated soil remediation agent, can solve the problems of low remediation efficiency and high treatment cost, and achieve the effect of increasing adsorption capacity, high adsorption value and high porosity

Inactive Publication Date: 2018-12-25
内蒙古浩天生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are generally problems such as low repair efficiency and high processing cost.

Method used

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

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Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0042] The mixture of straw and calcium oxide is used as raw material, the mass ratio of the straw and calcium oxide is 20:1, the system pressure is 20kPa and the pyrolysis temperature is 500°C under vacuum pyrolysis for 30 minutes, and the granules obtained by grinding treatment Solid powder with a diameter of 3mm or less;

[0043] Obtain ethylenediaminetetraacetic acid, polyacrylamide, nitrilotriacetic acid, α-cyclodextrin, starch solid powder with a particle size of 2mm or less;

[0044] Weigh according to mass percentage:

[0045] Biomass charcoal 40%;

[0046] Ethylenediaminetetraacetic acid 15%;

[0047] Polyacrylamide 15%;

[0048] Nitrilotriacetic acid 15%;

[0049] α-cyclodextrin 10%;

[0050] Starch 5%,

[0051] The biomass charcoal, ethylenediaminetetraacetic acid, polyacrylamide, nitrilotriacetic acid, α-cyclodextrin and starch are mixed in the above-mentioned proportions to prepare a repair agent.

preparation Embodiment 2

[0053] The mixture of straw and calcium oxide is used as raw material, the mass ratio of the straw and calcium oxide is 20:1, the system pressure is 20kPa and the pyrolysis temperature is 500°C under vacuum pyrolysis for 30 minutes, and the granules obtained by grinding treatment Solid powder with a diameter of 3mm or less;

[0054] Obtain ethylenediaminetetraacetic acid, polyacrylamide, nitrilotriacetic acid, α-cyclodextrin, starch solid powder with a particle size of 2mm or less;

[0055] Weigh according to mass percentage:

[0056] Biomass char 50%;

[0057] Ethylenediaminetetraacetic acid 20%;

[0058] Polyacrylamide 10%;

[0059] Nitrilotriacetic acid 10%;

[0060] α-cyclodextrin 5%;

[0061] Starch 5%;

[0062] The biomass charcoal, ethylenediaminetetraacetic acid, polyacrylamide, nitrilotriacetic acid, α-cyclodextrin and starch are mixed in the above-mentioned proportions to prepare a repair agent.

preparation Embodiment 3

[0064] The mixture of straw and calcium oxide is used as raw material, the mass ratio of the straw and calcium oxide is 20:1, the system pressure is 20kPa and the pyrolysis temperature is 500°C under vacuum pyrolysis for 30 minutes, and the granules obtained by grinding treatment Solid powder with a diameter of 3mm or less;

[0065] Obtain ethylenediaminetetraacetic acid, polyacrylamide, nitrilotriacetic acid, α-cyclodextrin, starch solid powder with a particle size of 2mm or less;

[0066] Weigh according to mass percentage:

[0067] Biomass charcoal 30%;

[0068] Ethylenediaminetetraacetic acid 10%;

[0069] Polyacrylamide 20%;

[0070] Nitrilotriacetic acid 20%;

[0071] α-cyclodextrin 10%;

[0072] Starch 10%,

[0073] The biomass charcoal, ethylenediaminetetraacetic acid, polyacrylamide, nitrilotriacetic acid, α-cyclodextrin and starch are mixed in the above-mentioned proportions to prepare a repair agent.

[0074] The specific implementation and technical effects of the application of...

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Abstract

The invention provides a heavy-metal compound contaminated soil remediation agent. The remediation agent is composed of the following ingredients in percentage by weight: 30-50% of biomass charcoal, 10-20% of ethylenediaminetetraacetic acid, 10-20% of polyacrylamide, 10-20% of nitrilotriacetic acid, 5-10% of alpha-cyclodextrin, and 5-10% of starch, wherein the abovementioned components adequately exert a synergistic effect, the content of effective-state heavy metal in the soil is greatly reduced through the effect of chelation, precipitation, adsorption, improvement, pH value adjustment and the like, and the prepared soil remediation agent has a good effect during remediation for cadmium-lead-arsenic compound contaminated soil. The remediation agent provided by the invention has the advantages of being simple and feasible in preparation method, and good in treatment effect.

Description

Technical field: [0001] The invention relates to the technical field of soil pollution remediation, in particular to a heavy metal composite contaminated soil remediation agent and its application. technical background: [0002] Soil heavy metal pollution has gradually become the focus of public attention. [0003] According to the “National Survey Bulletin on Soil Pollution Status” published by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the overall soil environmental conditions across the country are not optimistic, with heavy soil pollution in some areas, poor soil environmental quality of cultivated land, and serious environmental problems in industrial and mining wastelands. . Man-made activities such as industry, mining, agriculture, and high soil environmental background values ​​are the main reasons for soil pollution or exceeding standards. The country’s total soil over-standard rate was 16.1%, of which the proportions of slig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08C09K17/40
CPCB09C1/08C09K17/40C09K2101/00
Inventor 周益辉
Owner 内蒙古浩天生物科技有限公司
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