Environmental-friendly heavy metal stabilizer and application method thereof

A heavy metal stabilizer, an environmentally friendly technology, applied in chemical instruments and methods, applications, agriculture, etc., can solve the problems of limited practical use, soil hardening, etc., and achieve poor arableability, reduced toxicity and bioavailability, Effects on reducing risks to the environment and human health

Active Publication Date: 2014-08-27
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the technical deficiencies in the prior art of using hydraulic materials such as cement as a stabilizer to deal with soil heavy metal po

Method used

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  • Environmental-friendly heavy metal stabilizer and application method thereof

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Effect test

Embodiment 1

[0039] An environment-friendly heavy metal stabilizer, the preparation method includes the following material components in terms of parts by mass: 40 parts of clay minerals, 17 parts of adsorption materials, 10 parts of heavy metal chelating agents, 4 parts of heavy metal precipitants, and alkaline regulators 10 parts, the attapulgite needs to be activated at 220-350°C for 20-30 minutes before use, wherein the heavy metal precipitant is selected from hydroxyapatite, and the alkaline regulator is lime powder, and the lime powder is passed through 200 sieves used later.

[0040] The clay minerals include 25 parts of attapulgite and 15 parts of attapulgite.

[0041] The adsorption material comprises 15 parts of peanut shell powder and 2 parts of nanometer gamma-alumina, and the particle size of the peanut shell powder is 2-3 mm.

[0042] The heavy metal chelating agent comprises 5 parts of sodium lignosulfonate and 5 parts of sodium humate.

[0043] The heavy metal ions in the h...

Embodiment 2

[0055] An environment-friendly heavy metal stabilizer, the preparation method includes the following material components in terms of parts by mass: 46 parts of clay minerals, 20 parts of adsorption materials, 16 parts of heavy metal chelating agents, 6 parts of heavy metal precipitants, and alkaline regulators 12 parts, the attapulgite needs to be activated at 220-350°C for 20-30 minutes before use, wherein the heavy metal precipitant is selected from hydroxyapatite, and the alkaline regulator is lime powder, and the lime powder is passed through 200 sieves used later.

[0056] The clay minerals include 28 parts of attapulgite and 18 parts of attapulgite.

[0057] The adsorption material includes 17 parts of peanut shell powder and 3 parts of nanometer gamma-alumina, and the particle size of the peanut shell powder is 2-3 mm.

[0058] The heavy metal chelating agent comprises 7 parts of sodium lignosulfonate and 7 parts of sodium humate.

[0059] The heavy metal ions in the ...

Embodiment 3

[0066] An environment-friendly heavy metal stabilizer, the preparation method includes the following material components in terms of parts by mass: 50 parts of clay minerals, 24 parts of adsorption materials, 18 parts of heavy metal chelating agents, 8 parts of heavy metal precipitants, and alkaline regulators 15 parts, the attapulgite needs to be activated at 220-350°C for 20-30 minutes before use, wherein the heavy metal precipitant is selected from hydroxyapatite, and the alkaline regulator is lime powder, and the lime powder is passed through 200 sieves used later.

[0067] The clay minerals include 30 parts of attapulgite and 20 parts of attapulgite.

[0068] The adsorption material includes 20 parts of peanut shell powder and 4 parts of nanometer gamma-alumina, and the particle size of the peanut shell powder is 2-3 mm.

[0069] The heavy metal chelating agent comprises 8 parts of sodium lignosulfonate and 10 parts of sodium humate.

[0070] The heavy metal ions in the...

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Abstract

The invention relates to the field of environmental protection and restoration and in particular relates to an environmental-friendly heavy metal stabilizer used for soil restoration of an industrial pollution site and an application method thereof. The environmental-friendly heavy metal stabilizer is prepared from the following material components in parts by weight: 40-50 parts of clay mineral, 17-24 parts of adsorbing material, 10-18 parts of heavy metal chelating agent, 4-8 parts of heavy metal precipitating agent and 10-15 parts of alkaline modifier. Main ingredients of the adopted stabilizer are natural materials, heavy metal pollutant in soil can be rapidly and effectively stabilized through composite action such as chelating, precipitation and adsorption; the heavy metal pollutant is stabilized for a long time, toxicity and biological availability of the heavy metal pollutant can be reduced, risk of the heavy metal polluted soil to the environment and human health is reduced, and the heavy metal polluted soil is restored; besides, a soil texture improving ingredient is contained, so that soil is restored while tillability of the soil is improved.

Description

technical field [0001] The invention relates to the field of environmental protection and restoration, in particular to an environment-friendly heavy metal stabilizer used for soil restoration and treatment of industrial polluted sites and a method for using the same. Background technique [0002] With the upgrading of industrial structure and the adjustment of urban layout, large and medium-sized cities across the country are facing the closure and relocation of a large number of polluting enterprises, resulting in a large number of leftover and abandoned industrial polluted sites in the city, among which heavy metal polluted soil is a common type of industrial polluted site type. Most of these polluted sites face changes in land use due to commercial development. Due to the long-term, potential and irreversible harm of heavy metals to animals, plants and human bodies, corresponding restoration should be carried out before the contaminated soil is reused to ensure the envir...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08B09C1/00A62D3/33A62D101/43
Inventor 周芬唐晓声胡波李海建曹科孙进
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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