PMID: 15382862Sep 24, 2004Paper

Importance of adsorption (hole-filling) mechanism for hydrophobic organic contaminants on an aquifer kerogen isolate

Environmental Science & Technology
Yong RanJiamo Fu

Abstract

Sorption and desorption behaviors of four hydrophobic organic compounds (HOCs) were investigated for an isolated kerogen material from Borden aquifer material with total organic carbon of 0.021%. The solubility-normalized modified Freundlich equation and the combined linear and Polanyi-Dubinin (PD) equation can quite well describe the sorption or desorption isotherms. The partition component is estimated and compared using desorption data, dual-mode modeling, and the reported partition coefficients. The result suggests that the dual-mode modeling and the combined linear and PD modeling may overestimate the partitioning component. The partition component is not so important as assumed before in sorption of HOCs for the studied sorbent. As the fitted PD equation has an exponent parameter b' approaching 1, it is equivalent to the modified Freundlich equation. The small molecules 1,2-dichlorobenzene (DCB) and naphthalene (Naph) have higher adsorption volumes. The lower adsorption volumes for 1,3,5-trichlorobenzene (TCB) and phenanthrene (Phen) suggest that accessibility to the holes of kerogen by large HOC molecules is reduced. The desorption hysteresis is approximately constant for DCB when the relative aqueous concentration range...Continue Reading

Citations

Apr 17, 2013·Environmental Science and Pollution Research International·Jing ZhangErwin Klumpp
Mar 26, 2013·The Science of the Total Environment·Qing ZhaoPeijun Li
May 31, 2011·Journal of Hazardous Materials·Caixia YanJohn L Zhou
Sep 8, 2010·Environmental Toxicology and Chemistry·Jake W GinsbachFrank M Dunnivant
Mar 12, 2011·Marine Pollution Bulletin·Yi YangJohn L Zhou
Aug 7, 2009·Environmental Pollution·Zunlong ZhouG Daniel Sheng
Feb 18, 2006·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Jin Hur, Mark A Schlautman
Dec 23, 2008·Journal of Colloid and Interface Science·F A VegaM L Andrade
May 13, 2005·Journal of Environmental Quality·Michael SanderJoseph J Pignatello
Oct 5, 2010·Environmental Science & Technology·Jing ZhangErwin Klumpp
Sep 4, 2014·Environmental Science & Technology·Lanfang HanBaoshan Xing

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