PMID: 16509334Mar 3, 2006Paper

Enhanced sorption of trichloroethene by smectite clay exchanged with Cs+

Environmental Science & Technology
Vaneet AggarwalB J Teppen

Abstract

Trichloroethene (TCE) is one of the most common pollutants in groundwater, and Cs+ can be a cocontaminant at nuclear facilities. Smectite clays have large surface areas, are common in soils, have high affinities for some organic contaminants, and hence can potentially influence the transport of organic pollutants entering soils and sediments. The exchangeable cations present near smectite clay surfaces can radically influence the sorption of organic pollutants by soil clays. This research was undertaken to determine the effect of Cs+, and other common interlayer cations, such as K+ and Ca2+, on the sorption of TCE by a reference smectite clay saponite. Cs-saturated clay sorbed the most TCE, up to 3500 mg/kg, while Ca-saturated smectite sorbed the least. We hypothesize that the stronger sorption of TCE by the Cs-smectite can be attributed to the lower hydration energy and hence smaller hydrated radius of Cs+, which expands the lateral clay surface domains available for sorption. Also, Cs-smectite interlayers are only one or two water layers thick, which may drive capillary condensation of TCE. Our results implicate enhanced retention of TCE in aquifer materials containing smectites accompanied by Cs+ cocontamination.

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Citations

Jul 31, 2009·Die Naturwissenschaften·Bruno YaronBrian Berkowitz
May 8, 2010·Environmental Science & Technology·Cheng GuStephen A Boyd
Jul 8, 2010·Journal of Hazardous Materials·Zongsu Wei, Youngwoo Seo
Apr 20, 2010·Journal of Environmental Sciences (China)·Prabhakar Pant, Sudhakar Pant
Aug 28, 2012·Chemosphere·D E MatthieuJ E Curry
Jun 24, 2019·Environmental Science and Pollution Research International·Liang Li, G Daniel Sheng
Aug 28, 2009·Environmental Science & Technology·Dong-Hee Lim, Christian M Lastoskie
Sep 15, 2009·Environmental Science & Technology·Cuiping WangHui Li
May 30, 2009·Environmental Science & Technology·Cun LiuStephen A Boyd
Mar 27, 2009·Environmental Science & Technology·Dong-Hee LimUdo Becker
Jun 18, 2021·The Science of the Total Environment·Landon J S HalloranDaniel Hunkeler
Feb 9, 2018·Environmental Science & Technology·Chao QinYanzheng Gao
Feb 25, 2011·Environmental Science & Technology·Xiaolei QuDongqiang Zhu
Jan 30, 2015·Environmental Science & Technology·Cun LiuDongmei Zhou
Apr 3, 2007·Environmental Science & Technology·Jed Costanza, Kurt D Pennell

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