Abiotic transformation of chlorinated organics at the active surface of iron-bearing minerals in soils and sediments

作     者：LI XuXin YAN Chen ZENG YuXi LI WenBin PENG TianWei SONG Biao ZHOU ChengYun 

作者机构：College of Environmental Science and EngineeringHunan UniversityChangsha 410082China Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2024年第67卷第10期

页      面：2991-3008页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 0815[工学-水利工程] 120405[管理学-土地资源管理] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.52100180) the Fundamental Research Funds for the Central Universities(Grant No.531118010817) 

主　　题：chlorinated organic compounds iron-bearing minerals dechlorination degradation remediation 

摘      要：Chlorinated organic compounds are emerging pollutants of widespread concern because of their toxicity,bioaccumulation,persistence,and lack of adequate regulatory *** abiotic transformation,facilitated by iron-bearing minerals,is critical to their natural dissipation in soils and ***,further exploration is needed to understand their underlying mechanisms and potential engineering applications under different redox *** paper reviews the abiotic transformation behaviors and mechanisms of chlorinated organics at the active surface of iron-bearing minerals under anoxic and oxic conditions and summarizes the strategies for enhancing the abiotic transformation efficiency of chlorinated *** abiotic transformation rate under oxic conditions can be a few orders of magnitude higher than that under anoxic *** anoxic conditions,chlorinated organics undergo reductive dechlorination through reductive elimination,hydrogenolysis,dehydrohalogenation,and nucleophilic substitution.A close relationship between the abiotic transformation of chlorinated organics and the production of hydroxyl radicals by iron-bearing minerals under oxic conditions was *** active iron-bearing minerals,carbonaceous materials,and biological synergy can facilitate abiotic dechlorination under anoxic ***,the regulation of redox conditions,the introduction of ligands,and the utilization of coexisting anions are proposed to enhance oxidative *** study is expected to improve the comprehension of the abiotic degradation of chlorinated organics mediated by iron-bearing minerals and provide the theoretical foundation for developing new approaches aimed at addressing chlorinated organic pollution.