Modified biochar preparation method and modified biochar

A technology of biochar modification, applied in the field of soil remediation, can solve problems such as hidden dangers of environmental pollution

Inactive Publication Date: 2020-06-09
招商局生态环保科技有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

Biochar modified with chemical agents or metal oxides is used for soil improvement, which introduces potential pollutants into the soil, thus bringing hidden dangers of environmental pollution

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  • Modified biochar preparation method and modified biochar

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Embodiment Construction

[0019] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0020] figure 1 It is a flow chart of the preparation method of modified biochar provided by an embodiment of the present invention, see figure 1 , The preparation method of the modified biochar comprises: air-drying, drying, pyrolyzing and pulverizing the biomass in order to obtain the biochar. Biomass includes agricultural and forestry wastes such as straw, weeds, and wood, and the preferred biomass in this embodiment is Chinese fir. The specific steps for preparing biochar include: cutting fir into small pi...

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Abstract

The invention discloses a modified biochar preparation method and the modified biochar. The modified biochar preparation method comprises the steps: sequentially carrying out air drying, drying, pyrolysis and crushing on biomass to obtain biochar; preparing a humic acid solution; putting the biochar and the humic acid solution into a flask, oscillating the flask to enable the biochar to load humicacid, and filtering out the solution after oscillation is finished to obtain a biochar and humic acid compound; carrying out a desorption experiment on the charcoal humic acid compound to obtain thecharcoal humic acid compound with stable load, wherein the modified biochar is a biochar humic acid compound prepared according to the preparation method of the modified biochar. According to the preparation method of the modified biochar provided by the invention, a strong oxidant or a metal oxide is not used for modification, so that the hidden danger of environmental pollution caused by chemical product modification is avoided.

Description

technical field [0001] The invention relates to the technical field of soil restoration, in particular to a preparation method of modified biochar and the modified biochar. Background technique [0002] Biochar (Biochar, BC) is a general term for carbon-containing high polymers produced by incomplete combustion of biomass (such as straw, weeds, wood and other agricultural and forestry waste) under anoxic conditions. Biochar has a highly aromatized structure, porous surface and rich oxygen-containing functional groups, and has the characteristics of surface adsorption and chemical stability. Biochar itself is difficult to react with the surrounding environmental substances and disappear. Even through geological cycles such as sedimentation, burial, and weathering, it can still exist in large quantities in the atmosphere, soil, sediment, rock, water, and ice. [0003] Biochar modification methods mainly include oxidant surface oxidation, metal oxide impregnation and so on. T...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C09K17/40
CPCB01J20/24C09K17/40
Inventor 李建亮刘煌陈克军徐宗永曹琳龙建兵许国静宋方方
Owner 招商局生态环保科技有限公司
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