文献类型：期刊文献

英文题名：Biochar supported Ni/Fe bimetallic nanoparticles to remove 1,1,1-trichloroethane under various reaction conditions

作者：Li, Hui[1];Qiu, Yue-feng[1];Wang, Xiao-li[1];Yang, Jie[2];Yu, Yun-jiang[3];Chen, Ya-qin[1];Liu, Yong-di[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Shanghai Acad Environm Sci, Res Inst Wastes & Soil Remediat, Shanghai 200233, Peoples R China;[3]MEP, South China Inst Environm Sci, Ctr Environm Hlth Res, Guangzhou 510535, Guangdong, Peoples R China

年份：2017

卷号：169

起止页码：534

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20164903082798);WOS:【SCI-EXPANDED(收录号:WOS:000393003300063)】；

基金：This study was financially supported by the National Natural Science Foundation of China (41273109, 51378208, 21377045, U1401233 and 51578240), Program for New Century Excellent Talents in University (NCET-13-0797), Fok Ying Tung Education Foundation (141077), Innovation Program of Shanghai municipal of Science and Technology Commission (15DZ1205804), Fundamental Research Funds for the Central Universities (WB1313008, WB1516015, WB1616012). We also would like to thank the anonymous referees for their helpful comments on this paper.

语种：英文

外文关键词：1,1,1-TCA; Groundwater remediation; Biochar; Ni/Fe bimetallic nanoparticles

摘要：In this study, Ni/Fe nanoparticles supported by biochar to stimulate the reduction of 1,1,1-trichloroethane (1,1,1-TCA) in groundwater remediation was investigated. In order to enhance the reactivity of ZVI (zero valent iron) nanoparticles, surface modification of ZVI was performed using nickel and biochar. The removal efficiency of 1,1,1-TCA increased from 423% to 99.3% as the biochar-to-Ni/Fe mass ratio increased from 0 to 1.0. However a higher biochar-to-Ni/Fe ratio showed little difference in the 1,1,1-TCA degradation efficiency. In the presence of Ni, atomic hydrogen generated by ZVI corrosion could be absorbed in the metal additive's lattice and then produce a hydride-like species (H-center dot) that represented the primary redox-active entity. The effects of various factors were evaluated, including pH, humic acid (HA) and inorganic matters (Cl-, CO32-, HCO3-, NO3- and SO42-). The degradation of 1,1,1-TCA was greatly affected by pH. The presence of Cl-, CO32-, HCO3- and SO42- had negligible effects, but NO3- and HA showed a significant inhibitory effects on 1,1,1-TCA degradation. In conclusion, biochar supported Ni/Fe nanoparticles could be highly effective for 1,1,1-TCA degradation. (C) 2016 Elsevier Ltd. All rights reserved.