Abstract
The domestic and foreign scholars found that biochar prepared from waste crops, animal manure, and tissues has a good adsorption effect on radioactive pollutants. Biochar is an ideal material for the adsorbent. This article summarizes the preparation methods and modification methods of biochar, and the adsorption characteristics of biochar to heavy metals and radioactive elements. This article also points out the problems and development trends in the current research of biochar.
Highlights
Agriculture is the mainstream industry in the world
The surface characteristics of biochar are determined by raw materials, pyrolysis methods, modification methods, and adsorption environment[5]
The carbon content and lignin content of different raw materials such as crops, animals, and plants are various, which leads to distinct adsorption effects of biochar prepared from every raw material under the same conditions
Summary
Agriculture is the mainstream industry in the world. Byproducts produced by agriculture, forestry, fishery, and animal husbandry from every country are tens of millions of tons each year. Most of the carbon-containing raw materials used in the production of biochar are regarded as waste, and the production of biochar can be regarded as " waste recycling and reuse" with a wide range of sources and low cost. Because of the low production cost and applicability of biochar, domestic and foreign scholars have begun to apply biochar in the treatment of radioactive wastewater, have conducted extensive analysis and research on the effect of its adsorption effect and preparation methods, modification methods, and conditions on the adsorption effect[2]. According to researchers at home and abroad, this article summarizes and analyzes the relationship between the surface physical, chemical properties of biochar and the adsorption performance, the raw materials and preparation methods of biochar, and other factors that affect the adsorption effect of biochar, related research results. The current status of carbon research is summarized and suggested
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