Soil conditioner for passivation of heavy metals and preparation method of soil conditioner

A soil conditioner and heavy metal technology, applied in soil conditioning materials, chemical instruments and methods, restoration of contaminated soil, etc., can solve the problems of affecting soil microorganisms and animal functions, destroying soil structure, high sodium ion content, etc., to achieve reserve Rich, widely distributed, the effect of eliminating waste water discharge
CN105733596AInactive Publication Date: 2016-07-06YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
Publication Date
2016-07-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a soil conditioner for passivation of heavy metals and a preparation method of the soil conditioner. The preparation method comprises the following steps: mixing a material which is rich in humic acid and a strongly alkaline solution; extracting the humic acid after heating the mixture; and carrying out combined flocculation on the humic acid to obtain the soil conditioner for passivation of the heavy metals. According to the preparation method, lignite and weathered coal which are distributed widely, abundant in reserves, low in price and easy to obtain are used as raw materials and are extracted in an environmentally friendly process, and the soil conditioner for passivation of the heavy metals is obtained by initiative combined flocculation. The soil conditioner contains calcium humate, is rich in functional groups such as carboxyl and hydroxyl, can effectively adsorb the heavy metals so as to reduce biological effectiveness of the heavy metals, and can be used for conditioning and repairing heavy metal polluted farmlands including acid soil.
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Description

Technical field:

[0001] The invention belongs to the technical field of soil conditioner preparation, in particular to an alkaline, calcium-rich humic acid soil conditioner prepared from coal and a preparation method thereof, which is applied to the treatment of heavy metal polluted farmland. technical background:

[0002] Soil degradation caused by processes such as soil erosion, soil desertification, soil salinization, soil pollution, and reduction of soil organic matter is very common. Soil degradation not only reduces soil productivity, but also affects other ecological functions of soil. These ecological functions include regulating the distribution of surface water, controlling the cycle of nutrient elements, absorbing, passivating and degrading harmful substances, buffering the emission of greenhouse gases, and preserving microbial genes, etc. . Therefore, soil degradation not only causes economic losses, but also reduces environmental quality and affects human heal...

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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