title: Biochar supported Ni/Fe bimetallic nanoparticles to remove 1,1,1-trichloroethane under various reaction conditions.
abstract: 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 42.3% 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) 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.
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, State Key Laboratory of Bioreactor Engineering, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, State Key Laboratory of Bioreactor Engineering, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
authors.forename: Yue-Feng
authors.initials: YF
authors.lastname: Qiu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, State Key Laboratory of Bioreactor Engineering, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Wang
authors.affiliation: Research Institute of Wastes and Soil Remediation, Shanghai Academy of Environmental Sciences, Shanghai, 200233, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.affiliation: Center for Environmental Health Research, South China Institute of Environmental Sciences, MEP, Guangzhou, 510535, PR China. Electronic address: yuyunjiang@scies.org.
authors.forename: Yun-Jiang
authors.initials: YJ
authors.lastname: Yu
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, State Key Laboratory of Bioreactor Engineering, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
authors.forename: Ya-Qin
authors.initials: YQ
authors.lastname: Chen
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, State Key Laboratory of Bioreactor Engineering, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China. Electronic address: ydliu@ecust.edu.cn.
authors.forename: Yong-di
authors.initials: YD
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D002849:Chromatography, Gas; D052918:Environmental Restoration and Remediation; D060587:Groundwater / Q000737:chemistry; D006812:Humic Substances / Q000032:analysis; D007501:Iron / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D014240:Trichloroethanes / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006812:Humic Substances; D014240:Trichloroethanes; D014874:Water Pollutants, Chemical; C540010:biochar; C024566:1,1,1-trichloroethane; D002606:Charcoal; D009532:Nickel; D007501:Iron
keywords: 1,1,1-TCA; Biochar; Groundwater remediation; Ni/Fe bimetallic nanoparticles