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Stable curing agent of repairing heavy metal and toxic organic matter combined polluted soil and using method of curing agent

A technology of complex pollution and polluted soil, which is applied in the restoration of polluted soil, chemical instruments and methods, organic fertilizers, etc., can solve the problems of simultaneous repair and treatment of soil, difficulty in large-scale promotion, high treatment cost, etc., and achieve long-term enhancement Stabilizing effect, improving workability, and reducing the effect of toxic organic substances

Active Publication Date: 2014-06-25
WELLE ENVIRONMENTAL GRP CO LTD
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Problems solved by technology

Although the traditional stable curing agent technology has the advantages of easy operation and low cost, the treated soil has problems such as hardening and volume expansion, and it cannot meet the requirements of simultaneously repairing and treating complex contaminated soil with heavy metals and toxic organic compounds.
The step-by-step treatment can detoxify toxic organic pollutants and heavy metal pollutants separately, although it can solve the problem of compound pollution, but this method has high treatment costs and complicated construction, making it difficult to promote on a large scale

Method used

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  • Stable curing agent of repairing heavy metal and toxic organic matter combined polluted soil and using method of curing agent
  • Stable curing agent of repairing heavy metal and toxic organic matter combined polluted soil and using method of curing agent
  • Stable curing agent of repairing heavy metal and toxic organic matter combined polluted soil and using method of curing agent

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Embodiment Construction

[0018] The stable curing agent for remediating heavy metal and toxic organic compound polluted soil of the present invention, the stable curing agent comprises the following raw materials by mass percentage: comprising 10%-30% of cement, 10%-30% of fly ash, 20%- 50% clay, 2%-10% activator and 2%-20% oxidizer. The present invention uses cement as a cementing agent to form insoluble complexes between cement and heavy metal ions in polluted soil, thereby stabilizing and solidifying, thereby reducing the bioavailability of heavy metals, and reducing the reaction process through fly ash The heat of hydration in the soil can improve the workability of the stable curing agent and the polluted soil, play the role of a dispersant, and adsorb heavy metals and toxic organic substances through the clay, which can effectively reduce the leaching of heavy metal ions and toxic organic substances. The clay of the present invention It is one of montmorillonite, bentonite, hectorite, kaolin or ...

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Abstract

The invention relates to a stable curing agent of repairing heavy metal and toxic organic matter combined polluted soil. The stable curing agent comprises the following raw materials in percentage by weight: 10-30% of cement, 10-30% of coal ash, 20-50% of clays, 2-10% of an activating agent and 2-20% of an oxidizing agent, wherein the activating agent is a composition of one or more than two of magnesium oxide, aluminum oxide, titanium dioxide or molybdenum trioxide, and the oxidizing agent is a composition of one or more than two of sodium persulfate, calcium peroxide, potassium persulfate and ammonium persulfate. The raw materials are put into a grinder to be uniformly grinded and mixed to prepare the stable curing agent with the specific surface area of 400-800 / kg. The stable curing agent provided by the invention has the characteristics of low cost, good soil repairing effect and simplicity in construction.

Description

technical field [0001] The invention relates to a stable curing agent for repairing compound polluted soil by heavy metals and toxic organic substances and a method for using the same, belonging to the technical field of soil pollution control in environmental protection. Background technique [0002] With the rapid development of economy and the rapid increase of population, the discharge of urban industrial "three wastes" and domestic sewage is increasing day by day, and the problem of soil environmental pollution is becoming more and more serious, especially the problem of heavy metal pollution in soil. Soil heavy metal pollution is concealed, long-term and irreversible. Pollutants stay in the soil for a long time, and it is difficult for plants or microorganisms to degrade. It can not only lead to soil degradation and damage to crops, but also directly threaten human life and health. In recent years, with the aggravation of environmental deterioration, the problem of hea...

Claims

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Application Information

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IPC IPC(8): C09K17/10B09C1/08C09K101/00
Inventor 宗韬尹贞廖书林马强朱卫兵李月中张进峰金慧宁
Owner WELLE ENVIRONMENTAL GRP CO LTD
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