Contaminated soil passivator and preparation method and application thereof

A technology of polluted soil and passivator, which is applied in the restoration of polluted soil, chemical instruments and methods, application and other directions, can solve the problem of reducing the content of available heavy metals in soil crops, poor adsorption and exchange performance of heavy metals, and complex preparation process of adsorbents and other problems, to achieve the effect of improving long-term stability, reducing dissolution and low cost
CN104560046AActive Publication Date: 2015-04-29SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI LVQIANG NEW MATERIALS CO LTD
Publication Date
2015-04-29

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Abstract

The invention relates to a contaminated soil passivator and a preparation method and application thereof. The passivator is formed by mixing the following raw materials in percentage by weight: 30-60 percent of a natural clay mineral material, 30-60 percent of industrial harmless wastes and 10-20 percent of a cation-exchanger, wherein the cation-exchanger refers to an X-type molecular sieve or a molecular sieve with the particle size of more than 4A. Compared with the prior art, the passivator disclosed by the invention is completely prepared from the natural clay mineral material and a mineral-like material, the cost is low, secondary pollution is avoided, the environment friendliness idea is completely achieved, the pulverized fuel ash and other industrial wastes are introduced, the problems such as waste storage and treatment are solved, and the passivator has good passivation effect and high long-term stability on the contaminated soil, particularly heavy metal contaminated soil, and is suitable for large-scale popularization and application.
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Description

technical field

[0001] The invention belongs to the technical field of environmental protection and relates to the passivation or harmless treatment of polluted soil, in particular to a polluted soil passivator and its preparation method and application. Background technique

[0002] In recent years, due to the frequent occurrence of major environmental events such as cadmium rice, blood lead, and cancer villages, the problem of heavy metal pollution in soil and groundwater has attracted more and more attention. From the perspective of the formation process and mechanism of heavy metal-contaminated soil, the process of eradicating pollution must be long-term and gradual. Therefore, it is urgent to develop a treatment method that is efficient, environmentally friendly, and cost-effective.

[0003] The solidification / stabilization repair technology has been widely used in Europe and the United States because of its advantages such as wide application range, short processing ti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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