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Generalized models for prediction of pentachlorophenol adsorption by natural soils

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Pentachlorophenol (PCP) is an ionogenic substance for which soil adsorption is a function of soil characteristics, solution composition, and pH. Generalized sorption models are developed to predict the sorption of PCP by natural soils. The proposed models use easily measured system variables as predictors, to capture the effects of soil, solution, and solute properties on the overall sorption process. Although these empirical models do not provide a mechanistic explanation of the process, they clearly demonstrate and quantify the correlation between the process variables and can be adapted to modeling of subsurface transport of PCP and to the design of soil remediation technologies, such as soil washing and bioremediation. Soil properties, such as cation-exchange capacity, particle size distribution, and organic carbon content, and soil-solution properties, such as soil-to-solution ratio and pH, and the aqueous solubility of PCP were found to be good predictors of the partitioning of this compound between the solid and the aqueous phases. The methodology developed here can be used to derive generalized nonlinear or log-linear models for other ionogenic substances for which the organic carbon-normalized partition coefficient does not adequately describe sorption by natural soils.


Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143096X127811

Publication date: May 1, 1996

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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