Effects of ferrous ions on the reductive dechlorination of trichloroethylene by zero-valent iron

Journal of Hazardous Materials
Chih-Chung LiuChun-Yuan Wang

Abstract

The surface characteristics of zero-valent iron (ZVI) and the efficiency of reductive dechlorination of trichloroethylene (TCE) in the presence of ferrous ions were studied. The experimental results indicated that the acid-washing of a metallic iron sample enhanced the efficiency of TCE degradation by ZVI. This occurred because acid-washing changed the conformation of oxides on the surface of iron from maghemite (gamma-Fe(2)O(3)) to the more hydrated goethite (alpha-FeOOH), as was confirmed by XPS analysis. However, when ferrous ions were simultaneous with TCE in water, the TCE degradation rate decreased as the concentration of ferrous ion increased. This was due to the formation of passive precipitates of ferrous hydroxide, including maghemite and magnetite (Fe(3)O(4)), that coated on the surface of acid-washed ZVI, which as a result inhibited the electron transfer and catalytic hydrogenation mechanisms. On the other hand, in an Fe(0)-TCE system without the acid-washing pretreatment of ZVI, ferrous ions were adsorbed into the maghemite lattice which was then converted to semiconductive magnetite. Thus, the electrons were transferred from the iron surface and passed through the precipitates, allowing for the reductive dechlorin...Continue Reading

Citations

Jun 27, 2014·Environmental Science and Pollution Research International·Liang ZhuXiangyang Xu
Mar 10, 2016·Journal of Environmental Chemical Engineering·Ljiljana RajicAkram N Alshawabkeh
Sep 27, 2012·Journal of Hazardous Materials·Liang ChenPatricia J S Colberg
Feb 15, 2011·Journal of Hazardous Materials·Liang ChenPatricia J S Colberg
Jan 18, 2011·Journal of Environmental Sciences (China)·Jun DongRui Zhou
Feb 26, 2008·Journal of Contaminant Hydrology·Wenqian DouSusan E Powers
Nov 6, 2015·Electrochimica Acta·Ljiljana RajicAkram Alshawabkeh
Oct 18, 2016·Journal of Environmental Sciences (China)·Cancan XuJialu Tang
Apr 14, 2016·Environmental Science and Pollution Research International·Jun HanHaibing Shao
Jan 18, 2011·Journal of Environmental Management·Xianlan ZhangYeqing Lan
May 14, 2009·Journal of Environmental Monitoring : JEM·Mario Rivero-Huguet, William D Marshall
Apr 21, 2018·Environmental Science and Pollution Research International·Buddhika GunawardanaMichel K Nieuwoudt
Jul 25, 2019·Environmental Science and Pollution Research International·Buddhika GunawardanaNaresh Singhal
Mar 7, 2021·International Journal of Environmental Research and Public Health·Xueqiang ZhuQiyan Feng
May 14, 2021·Environmental Science and Pollution Research International·Xiaoguang LiLieyu Zhang

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