Effects of different types of biochar on the properties and reactivity of nano zero-valent iron in soil remediation

作     者：Chengjie Xue Juan Wu Kuang Wang Yunqiang Yi Zhanqiang Fang Wen Cheng Jianzhang Fang Chengjie Xue;Juan Wu;Kuang Wang;Yunqiang Yi;Zhanqiang Fang;Wen Cheng;Jianzhang Fang

作者机构：School of EnvironmentSouth China Normal UniversityGuangzhou510006China Institute of Environmental Sciences(CML)Leiden UniversityLeiden2300 RAThe Netherlands Guangdong Technology Research Center for Ecological Management and Remediation of Water SystemGuangzhou510006China Guangdong Provincial Key Laboratory of Chemical Pollution&Environmental SafetyGuangzhou510006China 

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

年 卷 期：2021年第15卷第5期

页      面：257-269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] 120405[管理学-土地资源管理] 

基　　金：The National Key Research and Development Program of China(2018YFC1802802) the Guangdong Technology Research Center for Ecological Management and Remediation of Water Systems(2014B090904077) 

主　　题：Nano zero-valent iron Biochar BDE209 Transport Soil 

摘      要：The addition of nano zero-valent iron(nZVI)is a promising technology for the in situ remediation of ***,the mobility and,consequently,the reactivity of nZVI particles in contaminated areas decrease due to their rapid *** this study,we determined how nZVI particles can be stabilized using different types of biochar(BC)as a support(BC@nZVI).In addition,we investigated the transport behavior of the synthesized BC@nZVI particles in a column filled with porous media and their effectiveness in the removal of BDE209(decabromodiphenyl ether)from *** characterization results of N2 Brunauer-Emmett-Teller(BET)surface area analyses,scanning electron microscopy(SEM),X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTIR)indicated that nZVI was successfully loaded into the *** sedimentation test results and the experimental breakthrough curves indicated that all of the BC@nZVI composites manifested better stability and mobility than did the bare-nZVI particles,and the transport capacity of the particles increased with increasing flow velocity and porous medium ***,the maximum concentrations of the column effluent for bagasse-BC@nZVI(B-BC@nZVI)were 19%,37%and 48%higher than those for rice straw-BC@nZVI(R-BC@nZVI),wood chips-BC@nZVI(W-BC@nZVI)and corn stalks-BC@nZVI(C-BC@nZVI),respectively.A similar order was found for the removal and debromination efficiency of decabromodiphenyl ether(BDE209)by the aforementioned ***,the attachment of nZVI particles to BC significantly increased the reactivity,stability and mobility of B-BC@nZVI yielded,and nZVI the best performance.