文献类型：期刊文献

英文题名：Modified biochar: synthesis and mechanism for removal of environmental heavy metals

作者：Liu Z.; Xu Z.; Xu L.; Buyong F.; Chay T.C.; Li Z.; Cai Y.; Hu B.; Zhu Y.; Wang X.

机构：[1]Faculty of Applied Sciences, University Technology MARA, Shah Alam, 40450, Malaysia;[2]School of Life Science, Shaoxing University, Shaoxing, 312000, China;[3]College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China

年份：2022

卷号：1

期号：1

外文期刊名：Carbon Research

收录：Scopus(收录号：2-s2.0-85160047418)

语种：英文

外文关键词：Environmental heavy metals; Mechanism; Modified biochar; Pollution management; Synthesis

外文摘要：With social progress and industrial development, heavy metal pollution in water and soils environment is becoming more serious. Although biochar is a low-cost and environmentally friendly adsorbent for heavy metal ions, its adsorption and immobilization efficiency still need to be improved.?As an upgraded version of biochar, modified biochar has attracted extensive attention in the scientific community.?This review summarized the recent research progress on the treatment methods on heavy metal pollutants in water and soils using biochar. The features and advantages of biochar modification techniques such as physical modification, chemical modification, biological modification and other categories of biochar were discussed. The mechanism of removing heavy metals from soil and water by modified biochar was summarized.?It was found that biochar had better performance after modification, which provided higher surface areas and more functional groups, and had enough binding sites to combine heavy metal ions. Biochar is a very promising candidate for removing heavy metals in environment. Furthermore, some high valent metal ions could be reduced to low valent metals, such as Cr(VI) reduction to Cr(III), and form precipitates on biochar by in-situ sorption-reduction-precipitation strategy. However, it is still the direction of efforts to develop high-efficiency modified biochar with low-cost, high sorption capacity, high photocatalytic performance, environmentally friendly and no secondary pollution in future. ? 2022, The Author(s).