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Agent composition and method for restoring chromium-pollution soil

A technology for chromium-contaminated soil and composition, which is applied in the restoration of polluted soil, fertilizer mixture, soil conditioning materials, etc., to achieve the effects of simple construction process, simple operation, and long-term stability assurance

Inactive Publication Date: 2018-08-17
BEIJING GEOENVIRON ENG & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a long-term stable repairing agent and method for high-concentration plutonium-contaminated soil for the deficiencies existing in the existing high-concentration plutonium pollution remediation

Method used

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  • Agent composition and method for restoring chromium-pollution soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Select sample 1 for experiment, select 200g of ground samples, add 20g of ferrous sulfate (effective content 85%), add 6g of iron powder (content of elemental iron 65%), mix and maintain for 2 days; Add 6g of quicklime (effective content 87%) after the end, mix and maintain for 2 days; add 4g of organic fertilizer (total nutrient greater than 25% and organic matter greater than 30%) after the end of quicklime curing; add organic fertilizer After 1 day, 15 days, 30 days, 60 days were tested.

Embodiment 2

[0036] Select sample 2 for experiment, select 200g of ground sample, add ferrous sulfate 40g (effective content 85%), add iron powder 6g (elemental iron content 65%), mix and maintain for 2 days; ferrous sulfate, iron powder maintenance Add 6g of quicklime (effective content 87%) after the end, mix and maintain for 2 days; add 4g of organic fertilizer (total nutrient greater than 25% and organic matter greater than 30%) after the end of quicklime curing; add organic fertilizer After 1 day, 15 days, 30 days, 60 days were tested.

Embodiment 3

[0038] Select sample 3 for experiment, select 200g of ground sample, add ferrous sulfate 60g (effective content 85%), add iron powder 6g (elemental iron content 65%), mix and maintain for 2 days; ferrous sulfosulfate, iron powder Add 6g of quicklime (87% effective content) after curing, mix evenly and maintain for 2 days; add 4g of organic fertilizer (total nutrient greater than 25% and organic matter greater than 30%) after quicklime curing; add organic fertilizer and maintain for 1 day and 15 days , 30 days, and 60 days were tested.

[0039] After embodiment 1-3 handles and maintains and finishes, measure its concentration as follows:

[0040] Table 3 Test results after the test soil was treated with chemicals

[0041]

[0042]Through the detection of the treated chromium-contaminated samples, it can be known that the medicament and treatment method of the present invention can restore the high-concentration heavy metal chromium-contaminated soil to within the scope of t...

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Abstract

The invention discloses an agent composition and a method for restoring chromium-pollution soil. The agent composition comprises, by weight, 10-70 parts of ferrous sulfate, 2-10 parts of iron powder,2-10 parts of alkaline agent and 1-8 parts of organic fertilizer. Compared with the prior art, the agent composition has the advantages of being easy-to-obtain in raw material, proper in cost, simplein operation and high in restoration effect long-time stability; adding proportion of the agent composition is determined according to soil pollution degree and physiochemical properties, agent wastecaused by excessive restoration is avoided, and secondary pollution risk is lowered.

Description

technical field [0001] The invention belongs to the field of environmental restoration engineering, and more specifically relates to a pharmaceutical composition and a method for repairing chromium-contaminated soil. Background technique [0002] Chromium exists in two forms of hexavalent and trivalent in nature. Hexavalent chromium is oxidizing and can strongly destroy organisms. It is one of the internationally recognized carcinogenic heavy metals. Chromium and its compounds have been widely used in various fields of modern industrial production. They are indispensable in metallurgy, printing, leather, pharmaceuticals and other industries. less important raw materials. Due to improper management of chromium-containing pollutants in industrial production, a large amount of chromium-containing wastewater and waste residues are directly discharged without detoxification treatment, resulting in environmental pollution. According to the survey, there have been nearly 60 chrom...

Claims

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Application Information

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IPC IPC(8): B09C1/08C09K17/40
CPCB09C1/08C09K17/40
Inventor 吕正勇魏丽苗竹张亮亮任贝
Owner BEIJING GEOENVIRON ENG & TECH
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