Effective removal of chlorinated organic pollutants by bimetallic iron-nickel sulfide activation of peroxydisulfate  

作　　者：Xuan Yan Dongting Yue Chao Guo Songling Wang Xufang Qian Yixin Zhao 

机构地区：[1]School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200242,China

出　　处：《Chinese Chemical Letters》2020年第6期1535-1539,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21806106,51861145101,21777096 and 21777097);Shanghai Shuguang Grant(No.17SG11);the China Postdoctoral Science Foundation(Nos.2017M621483 and 2018T110397)。

摘　　要：Chlorinated organic pollutants(COPs)have caused serious contaminants in soil and groundwater,hence developing methods to remove these pollutants is necessary and urgent.By a simple hydrothermal method,we synthesized the bimetallic iron-nickel sulfide(FeNiS)particles which exhibited excellent catalytic property of COPs removal.FeNiS was chosen as the peroxydisulfate(PDS)activator to removal COPs including 4-chlorophenol(4-CP),1,4-dichlorophenol(1,4-DCP)and 2,4,6-trichlorophenol(2,4,6-TCP).The results show that FeNiS can efficiently activate PDS to produce sulfate radical(SO4·-)which plays major role in the oxidative dechlorination and degradation due to its strong oxidizing property and the ability of producing hydroxyl radicals(·OH)in the alkaline condition.Meanwhile,the Cl-abscised from COPs during the dechlorination can turn into the chlorine radicals and enhance the degradation and cause further mineralization of intermediate products.This bimetallic FeNiS catalyst is a promising PDS activator for removal of chlorinated organics.

关 键 词：Peroxydisulfate oxidation Bimetallic iron-nickel sulfide Chlorinated organic pollutants Sulfate radicals DECHLORINATION 

分 类 号：X505[环境科学与工程—环境工程] O643.36[理学—物理化学]