Biochar-based composites for removing chlorinated organic pollutants: Applications, mechanisms, and perspectives  

作　　者：Qingqing Song Fanying Kong Bing-Feng Liu Xueting Song Hong-Yu Ren 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,China [2]School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin,150030,China

出　　处：《Environmental Science and Ecotechnology》2024年第5期47-61,共15页环境科学与生态技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52376176);the Key Research and Development Program of Heilongjiang Province(No.2022ZX02C15).

摘　　要：Chlorinated organic pollutants constitute a significant category of persistent organic pollutants due to their widespread presence in the environment,which is primarily attributed to the expansion of agricultural and industrial activities.These pollutants are characterized by their persistence,potent toxicity,and capability for long-range dispersion,emphasizing the importance of their eradication to mitigate environmental pollution.While conventional methods for removing chlorinated organic pollutants encompass advanced oxidation,catalytic oxidation,and bioremediation,the utilization of biochar has emerged as a prominent green and efficacious method in recent years.Here we review biochar's role in remediating typical chlorinated organics,including polychlorinated biphenyls(PCBs),triclosan(TCS),trichloroethene(TCE),tetrachloroethylene(PCE),organochlorine pesticides(OCPs),and chlorobenzenes(CBs).We focus on the impact of biochar material properties on the adsorption mechanisms of chlorinated organics.This review highlights the use of biochar as a sustainable and eco-friendly method for removing chlorinated organic pollutants,especially when combined with biological or chemical strategies.Biochar facilitates electron transfer efficiency between microorganisms,promoting the growth of dechlorinating bacteria and mitigating the toxicity of chlorinated organics through adsorption.Furthermore,biochar can activate processes such as advanced oxidation or nano zero-valent iron,generating free radicals to decompose chlorinated organic compounds.We observe a broader application of biochar and bioprocesses for treating chlorinated organic pollutants in soil,reducing environmental impacts.Conversely,for water-based pollutants,integrating biochar with chemical methods proved more effective,leading to superior purification results.This review contributes to the theoretical and practical application of biochar for removing environmental chlorinated organic pollutants.

关 键 词：BIOCHAR Chlorinated organic pollutants Polychlorinated biphenyls TRICLOSAN TRICHLOROETHENE 

分 类 号：X703[环境科学与工程—环境工程]