The effect of organic sorbent concentration on sorption kinetics Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/gq67jv569

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  • Batch sorption tests were conducted using 3,4-DCP and cellulose triacetate as the sorbate/sorbent pair. Sorbate concentrations in the liquid were sampled with time and analyzed by electron capture detector gas chromatography. Sorption was found to be a two stage process characterized by a rapid initial uptake followed by a extended period of slower sorption. A fully reversible two step sorption model was applied to the results of batch sorption tests and sorption rate constants were determined. Although sorption equilibrium was not reached during the time scale of this study, it appears that the equilibrium partition coefficient, Kp, was not dependent upon sorbent concentration. Due to the extended period needed to reach sorption equilibrium, the kinetic approach to modeling sorption in subsurface environments may be more accurate than the use of local equilibrium assumptions.
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