Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

作     者：Kaikai Zhang Peng Sun Yanrong Zhang 

作者机构：School of Environmental Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2019年第13卷第2期

页      面：85-93页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by International Science & Technology Cooperation Program of China the Innovative and Inter disciplinary Team at HUST 

主　　题：Biochar Persistent free radicals Phenolic hydroxyl groups Cr(VI) reduction 

摘      要：This study investigated the facilitation of Cr(VI)decontamination to the formation of persistent free radicals(PFRs)on rice husk derived biochar.It was found that Cr(VI)remediation by biochar facilitated the production of PFRs,which increased with the concentration of treated Cr(VI).However,excessive Cr(VI)would induce their decay.Biochar with high pyrolysis temperature possessed great performance to Cr(VI)removal,which was mainly originated from its reduction by biochar from Inductively Coupled Plasma Optical Emission Spectroscopy and X-ray Photoelectron Spectroscopy.And the corresponding generation of PFRs on biochar was primarily ascribed to the oxidization of phenolic hydroxyl groups by Cr(VI)from Fourier Transform Infrared Spectroscopy analysis,which was further verified by the H2O2 treatment experiments.The findings of this study will help to illustrate the transformation of reactive functional groups on biochar and provide a new insight into the role of biochar in environmental remediation.