Heavy metal stabilizer for treating industrial contaminated place soil, and use method thereof

A heavy metal stabilizer, industrial technology, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., to achieve the effect of low cost, good application prospects, and simple use methods

Inactive Publication Date: 2018-01-05
李杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some soil heavy metal stabilization treatment technologies that have been developed so far still use sulfide, and the application of sulfide has the above-mentioned disadvantages
At present, there is no invention that discloses the mixture that can stabilize and repair heavy metal-contaminated soil. According to HJ / T 300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method" leaching method, the concentration of heavy metals in the leachate can be detected Standard GB16889-2008

Method used

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  • Heavy metal stabilizer for treating industrial contaminated place soil, and use method thereof
  • Heavy metal stabilizer for treating industrial contaminated place soil, and use method thereof
  • Heavy metal stabilizer for treating industrial contaminated place soil, and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A lead-polluted site that was originally a lead-acid battery factory is planned to be a residential area after restoration. The properties of lead-contaminated soil are as follows:

[0039]

[0040] Due to the serious pollution, the Environmental Protection Bureau where the project is located requires stabilization treatment and restoration, and HJ / T 300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetate Buffer Solution Method" was used for leaching toxicity leaching test, and the lead concentration in the leachate was lower than the standard 0.25mg / L of soil can enter the domestic waste landfill for landfill disposal.

[0041] According to the analysis judgments such as high pollution, pH value and experience according to lead-contaminated land original character, prepare the following components and weight percentages to form two test heavy metal stabilizer formula samples: 1# phosphate (superphosphate) 50.0%, cement (PC325 ) 10.0%, soda ash 20%, and ads...

Embodiment 2

[0047] A certain lead-contaminated site that was originally a steel factory is planned to be used as a commercial area after restoration. The properties of lead-contaminated soil are as follows:

[0048]

[0049] Due to serious pollution, the Environmental Protection Bureau where the project is located requires stabilization treatment and restoration, and HJ / T 300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method" is used for leaching toxicity leaching test. The lead concentration in the leachate is lower than the standard 0.25mg / The soil of L can enter the domestic waste landfill for landfill disposal.

[0050] According to the analysis judgments such as high pollution, pH value and experience according to the original character of the lead polluted land, prepare three test heavy metal stabilizer formula samples of following components and weight percentage composition: 1# phosphate (GPS) 25.0%, cement ( PC325) 5.0%, caustic soda 10.0...

Embodiment 3

[0056] A chromium-contaminated site that used to be a chemical plant producing chromium salts is planned to be a residential area after restoration. The soil properties of chromium-contaminated areas are as follows:

[0057]

[0058] The local Environmental Protection Bureau agrees to use stabilization treatment to repair and use HJ / T 299-2007 "Solid Waste Leaching Toxicity Leaching Method Sulfuric Acid Nitric Acid Method" to test the soil after leaching and stabilization treatment. When the leach solution Cr +6 The concentration of heavy metals is lower than the standard of Class V water in GB3838-2002 "Surface Water Quality Standards", that is, Cr in the leachate +6 If the concentration is lower than 0.1mg / L, the stabilized heavy metal-contaminated soil can be backfilled in situ. According to the method of the present invention, process and repair this chromium contaminated land, its test procedure is as follows:

[0059] According to the Cr contained in the chromium-c...

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Abstract

The invention relates to a heavy metal stabilizer for treating industrially polluted soil and a method for using the heavy metal stabilizer. The heavy metal stabilizer consists of phosphate, inorganic Composition of alkaline substances and adsorbents. The method of use includes: fully stirring and mixing phosphate, inorganic alkaline substances and adsorbents in proportion, and then adding them to the soil of industrially polluted sites for conservation. The invention does not contain any organic chelating agent such as dithiocarbamate or sulfide, has no secondary pollution and pollution-free; the method of use is simple, the cost is low, and it meets the benefits of energy saving and carbon reduction, economic benefits, and has good application prospects.

Description

technical field [0001] The invention belongs to the field of heavy metal stabilizers, in particular to a heavy metal stabilizer for treating soil in industrially polluted sites and a use method thereof. Background technique [0002] Decades of economic growth and rapid industrialization have seriously damaged China's ecological environment, including the deteriorating heavy metal pollution in the soil, and "cancer villages" frequently appear in many parts of the country. Heavy metal pollution in the environment not only affects the quality of crops and aquatic products, but also endangers human life and health through the food chain, and brings major hidden dangers and threats to people's lives. Heavy metals are "sedimentary pollution" in the environment, but they are migratory and stagnant. They may flow into the surrounding area and cause new land pollution. The harm to animals, plants and humans is long-term, potential and irreversible. The heavy metal pollution in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/10C09K17/08C09K17/06B09C1/08
Inventor 李杰石翰勋
Owner 李杰
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