This study focused on the effect of the M/D ratio and cationic strength on the sorption of hydrophobic compounds. The three compounds used in this study included bisphenol A, 17α-ethynylestradiol, and estriol, which are known to have estrogenic activity. Three different types of experiments were completed during this study. Sequencing batch reactors were used to evaluate sorption of hydrophobic compounds under simulated activated sludge-type conditions. Sorption isotherms were used to evaluate the sorption of hydrophobic compounds under various conditions with two different biosolids. Kinetic experiments were used to determine the time necessary for equilibrium and to observe concentration changes as a function of time. The results indicate that increasing the M/D ratio has the potential to reduce the sorption of hydrophobic compounds during water reclamation.
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