Competitive sorption of organic contaminants in chalk

Journal of Contaminant Hydrology
E R Graber, M Borisover

Abstract

In the Negev desert, Israel, a chemical industrial complex is located over fractured Eocene chalk formations where transfer of water and solutes between fracture voids and matrix pores affects migration of contaminants in the fractures due to diffusion into the chalk matrix. This study tests sorption and sorption competition between contaminants in the chalk matrix to make it possible to evaluate the potential for contaminant attenuation during transport in fractures. Single solute sorption isotherms on chalk matrix material for five common contaminants (m-xylene, ametryn, 1,2-dichloroethane, phenanthrene, and 2,4,6-tribromophenol) were found to be nonlinear, as confirmed in plots of Kd versus initial solution concentration. Over the studied concentration ranges, m-xylene Kd varied by more than a factor of 100, ametryn Kd by a factor of 4, 1,2-dichloroethane Kd by more than a factor of 3, phenanthrene Kd by about a factor of 2, and 2,4,6-tribromophenol Kd by a factor of 10. It was earlier found that sorption is to the organic matter component of the chalk matrix and not to the mineral phases (Chemosphere 44 (2001) 1121). Nonlinear sorption isotherms indicate that there is at least some finite sorption domain. Bi-solute competit...Continue Reading

References

Aug 22, 2001·Chemosphere·A Wefer-RoehlZ Ronen
May 22, 2002·Ground Water·A Wefer-RoehlZ Ronen
Jun 1, 1994·Environmental Science & Technology·C T Chiou, D E Kile

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Citations

May 13, 2006·Journal of Contaminant Hydrology·Shai EzraItzhak Bilkis
Nov 29, 2005·Journal of Contaminant Hydrology·Nathan W HawsEdward J Bouwer
Jan 6, 2009·Journal of Applied Microbiology·A NejidatZ Ronen
Jan 14, 2004·Environmental Science & Technology·Mikhail Borisover, Ellen R Graber
Sep 28, 2006·Journal of Agricultural and Food Chemistry·Michal ShechterBenny Chefetz

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