This  research investigates the relationship between total suspended solids  (TSS) and the desorption kinetics of persistent organic pollutants  (POPs) during simulated re-suspension events.  Recent literature has  investigated the effects of particle size and fraction of organic carbon  in the sediment, but little information exists regarding the effect  pollutant-free sediment particles on the net desorption of POPs. By  analyzing initial sorption and desorption rates of systems at multiple  TSS levels, this research demonstrates that desorption kinetics can be  modeled by a linear combination of two first-order kinetic processes  with rates partially dependent on TSS.  Furthermore, we show that when  sufficiently large ratios of pollutant-free sediment are present  relative to spiked sediment, the total concentration of POPs in the  aqueous phase is relatively low.

Desorption kinetics for chlorinated organic pollutants in model systems containing both contaminated and uncontaminated sediment

243rd National Meeting (2012)

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