| Title: | "Liquid-phase hydrodechlorination of trichloroethylene driven by nascent H(2) under an open system: Hydrogenation activity, solvent effect and sulfur poisoning" |
| Author(s): | Wang W; Zhang F; Zhang Y; Xu L; Pei Y; Niu J; |
| Address: | "State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China. Electronic address: niujf@dgut.edu.cn" |
| DOI: | 10.1016/j.jes.2021.02.015 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "Hydrodechlorination is a promising technology for the remediation of water body contaminated with trichloroethylene (TCE). In this work, the liquid-phase hydrogenation of TCE by Raney Ni (R-Ni) and Pd/C under an open system have been studied, in which nascent H(2) (Nas-H(2)) generated in situ from the cathode acted as a hydrogen source. Experimental results showed that TCE was completely eliminate from the solution through the synergistic effects of hydrodechlorination and air flotation due to the formation of continuous micro/nano-sized Nas-H(2) bubbles from the cathode. Furthermore, the effects of inorganic anions and organic solvents on R-Ni and Pd/C hydrogenation activity were investigated, respectively. The results showed that NO(3)(-) and acetonitrile can form a competitive reaction with TCE; Sulfur with lone-pair electrons will cause irreversible poisoning to these two catalysts, and have a stronger inhibitory effect on Pd/C. This work helps to realize the separation of volatile halogenated compounds from water environment and provides certain data support for the choice of catalyst in the actual liquid-phase hydrogenation system" |
| Keywords: | Catalysis Hydrogenation Solvents Sulfur *Trichloroethylene Air flotation Nascent H(2) Sulfur poisoning Trichloroethylene; |
| Notes: | "MedlineWang, Weilai Zhang, Fan Zhang, Yunfei Xu, Lei Pei, Yuansheng Niu, Junfeng eng Netherlands 2021/09/02 J Environ Sci (China). 2021 Oct; 108:96-106. doi: 10.1016/j.jes.2021.02.015. Epub 2021 Mar 2" |
