能源环境保护2024，Vol.38Issue(2)：14-23,10.DOI:10.20078/j.eep.20231205
生物炭成炭调控及固化土壤重金属研究进展
Advances in biochar carbonization regulation and remediation of soil heavy metals
摘要
Abstract
Biochar has vast potential for application in the remediation of heavy metals(HMs)in soil.The remediation effect depends on the physicochemical characteristics of biochar and the soil environ-ment.Exploring the mechanisms of biochar regulation and its ability to retain HMs can provide guidance for optimizing the biochar preparation process.This paper summarizes the changes in the physicochemical properties of biochar under varying preparation methods,explains the primary mecha-nism of HMs immobilization,and reviews the effects of biochar aging on its physicochemical properties.The main mechanisms of HMs adsorption by biochar in soil include pore adsorption,cation exchange,functional group complexation,and mineral precipitation.The relative importance of different adsorption mechanisms depends on factors such as pyrolysis temperature,raw material,residence time,and atmosphere.Additionally,biochar aging leads to changes in its physicochemical properties,such as pore breakage,decomposition of oxygen-containing functional groups,and unstable carbon precipitati-on.Different aging factors have varying impacts on biochar.Exploring the mechanisms of various aging factors and their effects on HMs adsorption,coupled with an in-depth examination of the pyrolysis process and carbon formation mechanism,can minimize the impact of environmental factors on the ef-fectiveness of HMs adsorption.Furthermore,this paper proposes future directions for biochar applica-tion,aiming to provide a reference for evaluating the effectiveness of biochar and guide its application in remediating HMs contaminated soil.关键词
生物炭/热解调控/重金属/理化特性/老化/吸附Key words
Biochar/Pyrolysis regulation/Heavy metals/Physicochemical properties/Aging/Adsorption分类
资源环境引用本文复制引用
廖玮,张雄,杨海平,邵敬爱,张世红,陈汉平..生物炭成炭调控及固化土壤重金属研究进展[J].能源环境保护,2024,38(2):14-23,10.基金项目
国家自然科学基金面上资助项目(51976075) （51976075）
国家自然科学基金面上资助项目(52176187) （52176187）
国家自然科学基金杰出青年基金资助项目(52125601) （52125601）
