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Cadmium-lead compound contaminated soil remediation agent and application thereof

A soil remediation agent and composite pollution technology, which is applied in the field of cadmium-lead composite polluted soil remediation agent, can solve the problems of low remediation efficiency and high treatment cost, and achieve the effects of increasing adsorption capacity, high adsorption value and abundant pores.

Inactive Publication Date: 2016-07-13
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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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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  • Cadmium-lead compound contaminated soil remediation agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

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

[0043] Obtain a liquid polyepoxysuccinic acid with a solids content of 35%;

[0044] Obtain polyacrylamide and starch solid powders whose particle diameters are respectively below 2mm.

[0045] The sodium bentonite has an alkalinity coefficient greater than 1, a montmorillonite content of 60-88%, and a particle size of 2mm

[0046] The following solid powders;

[0047] Weigh according to mass percentage:

[0048] Biochar 40%;

[0049] Polyepoxysuccinic acid 15%;

[0050] Polyacrylamide 15%;

[0051] Starch 15%;

[0052] Sodium bentonite 15%;

[0053] The biochar, polyacrylamide, starch, and sodium bentonite are firstly mixed according to the above ratio, and ...

preparation Embodiment 2

[0055] Using the mixture of straw and calcium oxide as raw material, the mass ratio of straw and calcium oxide is 20:1, vacuum pyrolysis for 30min under the conditions of system pressure of 20kPa and pyrolysis temperature of 500°C, the particles obtained by grinding Solid powder with a diameter of less than 3mm;

[0056] Obtain a liquid polyepoxysuccinic acid with a solids content of 35%;

[0057] Obtain polyacrylamide and starch solid powders whose particle diameters are respectively below 2mm.

[0058]The sodium bentonite has an alkalinity coefficient greater than 1, a montmorillonite content of 60-88%, and a particle size of 2mm

[0059] The following solid powders;

[0060] Weigh according to mass percentage:

[0061] Biochar 50%;

[0062] Polyepoxysuccinic acid 20%;

[0063] Polyacrylamide 10%;

[0064] Starch 10%;

[0065] Sodium bentonite 10%;

[0066] The biochar, polyacrylamide, starch, and sodium bentonite are firstly mixed according to the above ratio, and t...

preparation Embodiment 3

[0068] Using the mixture of straw and calcium oxide as raw material, the mass ratio of straw and calcium oxide is 20:1, vacuum pyrolysis for 30min under the conditions of system pressure of 20kPa and pyrolysis temperature of 500°C, the particles obtained by grinding Solid powder with a diameter of less than 3mm;

[0069] Obtain a liquid polyepoxysuccinic acid with a solids content of 35%;

[0070] Obtain polyacrylamide and starch solid powders whose particle diameters are respectively below 2mm.

[0071] The sodium bentonite has an alkalinity coefficient greater than 1, a montmorillonite content of 60-88%, and a particle size of 2mm

[0072] The following solid powders;

[0073] Weigh according to mass percentage:

[0074] Biochar 30%;

[0075] Polyepoxysuccinic acid 10%;

[0076] Polyacrylamide 20%;

[0077] Starch 20%;

[0078] Sodium bentonite 20%;

[0079] The biochar, polyacrylamide, starch, and sodium bentonite are firstly mixed according to the above ratio, and ...

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Abstract

The invention provides a cadmium-lead compound contaminated soil remediation agent, prepared from the following components by a weight ratio: 30-50% of biomass charcoal, 10-20% of polyepoxysuccinic acid, 10-20% of polyacrylamide, 10-20% of starch and 10-20% of sodium bentonite; the components give full play to the synergy, and effective state of cadmium and lead in soil are greatly reduced by carrying out chelation, precipitation, absorption, improvement, PH value adjustment and the like on the components; the prepared soil remediation agent has a good effect in remediation of the cadmium-lead compound contaminated soil; the remediation agent provided by the invention has the advantages of being simple and feasible in preparation method as well as good in treatment effect.

Description

Technical field: [0001] The invention relates to the technical field of soil pollution remediation, in particular to a cadmium-lead composite polluted 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 Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the overall situation of the national soil environment is not optimistic, the soil pollution in some areas is relatively serious, the quality of the soil environment of cultivated land is worrying, and the soil environment problems of industrial and mining wasteland are prominent. . Man-made activities such as industry, mining, agriculture, and high background values ​​of the soil environment are the main causes of soil pollution or exceeding standards. The total exceeding rate of national soil is 16.1%, of wh...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08
CPCB09C1/08C09K17/40
Inventor 周益辉
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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