Soil heavy mental pollution repairing agent containing lignin biochar as well as preparation method and application thereof

A pollution remediation and biochar technology, applied in the field of soil remediation, can solve the problems of soil ecological environment and crop growth hazards, expand the way of waste utilization, overcome the poor ability to adsorb high-valent heavy metals, and facilitate application
CN107794052AActive Publication Date: 2018-03-13NANCHANG INST OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NANCHANG INST OF TECH
Publication Date
2018-03-13

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Abstract

The invention relates to a soil heavy mental pollution repairing agent containing lignin biochar as well as a preparation method and application thereof. The method comprises the following steps thatbiochar powder, bone meal and attapulgite clay are mixed according to a weight ratio of (40 to 60) to (20 to 40) to (10 to 20), and are subjected to ultra-micro pulverization to obtain mixed powder; 2to 5 weight percent of sodium carboxymethylcellulose solution is slowly added into the mixed powder under the nitrogen gas protection and is fully stirred to obtain viscous liquid; zeolite is fully mixed and soaked in the viscous liquid and is then fished out; heating and drying are performed, wherein the biochar powder is prepared from papermaking waste liquid lignin dry powder through high-temperature thermal cracking. The defects of poor high-valent heavy metal adsorption capability and low adsorption efficiency of the lignin biochar are overcome; the waste utilization path by lignin is expanded.
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Description

technical field

[0001] The invention relates to the technical field of soil remediation, in particular to a soil heavy metal pollution remediation agent containing lignin biochar and its preparation method and application. Background technique

[0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. With the development of industry and agriculture and the increase of population, the amount of agricultural soil is decreasing, and the harmful substances in the soil are increasing. According to statistics, 90% of the pollutants in the world end up in the soil. However, the soil's tolerance to harmful substances is limited. When the accumulation of harmful substances exceeds the soil's tolerance, it will cause soil environmental quality to deteriorate. At present, soil environmental quality has become a major issue of global concern. Among them, heavy metal pollution is particularly noticeable because of its ...

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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