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

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外文摘要：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 agri-cultural 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 chlori-nated 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 stra-tegies.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.

外文关键词：

BiocharChlorinated organic pollutantsPolychlorinated biphenylsTriclosanTrichloroethene

作者：

Qingqing Song、Fanying Kong、Bing-Feng Liu、Xueting Song、Hong-Yu Ren

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作者单位：

State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,China

School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin,150030,China

State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China

出版年：

2024

DOI：

10.1016/j.ese.2024.100420

环境科学与生态技术(英文)

ISSN：

年,卷(期)：2024.21(5)