The sorption of dichlorobenzene and trichlorobenzene on carbonate and shale rocks collected in Kentucky demonstrate that rock organic matter content is a good indicator of sorptive reactivity in rock systems. Although this is similar to soil systems, significant differences between sorption in rock and soil systems exist. Sorption isotherms on these rocks are nonlinear and sorption can be an order of magnitude higher than predicted using correlations from soils and their organic matter content. This sorption reaction could lead to significant concentration tailing during contaminant cleanup. Experimental elution of trichloroethylene from rock filled columns verified that cleanup times might be extended due to both sorption and diffusion into rock.
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The work upon which this report is based was supported in part by funds provided by the United States Department of the Interior, Washington, D.C. as authorized by the Water Resources Research Act of P.L. 101-397.
The authors also appreciate the financial support and resources provided by the Department of Civil Engineering and the College of Engineering at the University of Kentucky.
McGinley, Paul M.; Kesaraju, S.; and Gruzesky, Ronald D., "Sorption of Chlorinated Organic Compounds by Sedimentary Rocks" (1994). KWRRI Research Reports. 18.