PMID: 11513399Aug 22, 2001Paper

Sorption of organic contaminants in a fractured chalk formation

Chemosphere
A Wefer-RoehlZ Ronen

Abstract

Sorption capability of bedrock components from a fractured chalk province was evaluated using ametryn, phenanthrene, m-xylene, 2,4,6-tribromophenol, and 1,2-dichloroethane. Sorption isotherms for the four aromatic compounds were nonlinear on gray (unoxidized) chalk. Over the studied solution ranges, the distribution coefficient decreased by factor of 3 for phenanthrene and m-xylene, a factor 4 for ametryn, and by an order of magnitude for 2,4,6-tribromophenol. In contrast, 1,2-dichloroethane displayed a linear isotherm. The importance of polar interactions for ametryn sorption was evaluated by normalizing sorption to an "inert" solvent, n-hexane. n-Hexane-normalized sorption of ametryn was much greater than that of phenanthrene, presumably due to ametryn participation in hydrogen bonding interactions. In sharp contrast to sorption to gray chalk, sorption to white (oxidized) chalk is 100- to 1000-fold lower at any given solution concentration. The much greater sorption on gray chalk cannot be explained by specific surface area, clay content, or organic matter content; thus, the nature of the organic matter is considered to control sorption in the chalk samples. Gray chalk sorption capacity estimates for ametryn and 2,4,6-tribrom...Continue Reading

References

Jun 1, 1994·Environmental Science & Technology·C T Chiou, D E Kile
Jun 1, 1984·Environmental Science & Technology·R W Walters, R G Luthy

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Citations

Nov 11, 2003·Journal of Contaminant Hydrology·E R Graber, M Borisover
May 22, 2002·Ground Water·A Wefer-RoehlZ Ronen
May 13, 2006·Journal of Contaminant Hydrology·Shai EzraItzhak Bilkis
Aug 16, 2005·Journal of Contaminant Hydrology·Shai ArnonRonit Nativ
Jan 6, 2009·Journal of Applied Microbiology·A NejidatZ Ronen
Feb 3, 2005·Journal of Contaminant Hydrology·Shai ArnonRonit Nativ
Nov 1, 2018·The Science of the Total Environment·Ningxin ChenPierre Ribstein
Mar 11, 2005·Environmental Science & Technology·Shai ArnonRonit Nativ

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