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Water Res

Title:		Hydrophobic organic compound (HOC) partitioning behaviour to municipal wastewater colloidal organic carbon
Author(s):		McPhedran KN; Seth R; Drouillard KG;
Address:		"Department of Civil and Environmental Engineering, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4"
Journal Title:		Water Res
Year:		2013
Volume:		20130213
Issue:		7
Page Number:		2222 - 2230
DOI:		10.1016/j.watres.2013.01.039
ISSN/ISBN:		1879-2448 (Electronic) 0043-1354 (Linking)
Abstract:		"The sorption behaviour of hydrophobic organic compounds (HOCs) 1,2,4,5-tetrachlor-obenzene (TeCB), pentachlorobenzene (PeCB) and hexachlorobenzene (HCB) to Aldrich humic acid (AHA) and municipal wastewater treatment plant (MWTP) influent colloidal organic carbon (COC) was investigated using the gas-stripping technique. Gas stripping assumptions of gas/water equilibrium and a constant volatilization rate were validated prior to calculation of partitioning parameters. The logKCOC coefficients determined for MWTP influent COC were 3.86, 3.89 and 3.19 for TeCB, PeCB and HCB, respectively. Due to the presence of COC, the mass transfer of TeCB, PeCB and HCB with the primary effluent to the secondary biological stage was predicted to increase 8.7%, 9.6% and 1.2%, respectively, based on the measured COC concentration and logKCOC values. The calculated increases in apparent solubility for TeCB, PeCB and HCB in the primary effluent were 14.4%, 22.0% and 6.5%, respectively. This partitioning did not follow the expected trend (TeCB < PeCB < HCB) based on hydrophobicity predicted by octanol/water partitioning. The trend observed differed from the current AHA standard and correlation-based trends derived from natural COCs. More experiments with other HOCs are needed to better understand and predict the magnitude and significance of MWTP influent COCs on the fate and transport of HOCs during the MWTP process"
Keywords:		"Carbon/*isolation & purification Chlorobenzenes/analysis *Cities Colloids/*chemistry Humic Substances/analysis *Hydrophobic and Hydrophilic Interactions Kinetics Least-Squares Analysis Linear Models Models, Theoretical Ontario Organic Chemicals/*isolation;"
Notes:		"MedlineMcPhedran, Kerry N Seth, Rajesh Drouillard, Ken G eng Research Support, Non-U.S. Gov't England 2013/03/12 Water Res. 2013 May 1; 47(7):2222-30. doi: 10.1016/j.watres.2013.01.039. Epub 2013 Feb 13"