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- W2003280048 abstract "The fate of 14 antidepressants along with their respective N-desmethyl metabolites and the anticonvulsive drug carbamazepine (CBZ) was studied in 5 different sewage treatment plants (STPs) across Canada. Using two validated LC-MS/MS analytical methods, the concentrations of the different compounds were determined in raw influent, final effluent and treated biosolids samples. Out of the 15 compounds investigated, 13 were positively detected in most 24-h composite raw influent samples. Analysis showed that venlafaxine (VEN), its metabolite O-desmethylvenlafaxine (DVEN), citalopram (CIT), and CBZ were detected at the highest concentrations in raw influent (up to 4.3 μg L−1 for DVEN). Cumulated results showed strong evidence that primary treatment and trickling filter/solids contact has limited capacity to remove antidepressants from sewage, while activated sludge, biological aerated filter, and biological nutrient removal processes yielded moderate results (mean removal rates: 30%). The more recalcitrant compounds to be eliminated from secondary STPs were VEN, DVEN and CBZ with mean removal rates close to 12%. Parent compounds were removed to a greater degree than their metabolites. The highest mean concentrations in treated biosolids samples were found for CIT (1033 ng g−1), amitriptyline (768 ng g−1), and VEN (833 ng g−1). Experimental sorption coefficients (Kd) were also determined. The lowest Kd values were obtained with VEN, DVEN, and CBZ (67–490 L kg−1). Sorption of these compounds on solids was assumed negligible (log Kd ≤ 2). However, important sorption on solids was observed for sertraline, desmethylsertraline, paroxetine and fluoxetine (log Kd > 4)." @default.
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- W2003280048 date "2012-11-01" @default.
- W2003280048 modified "2023-10-10" @default.
- W2003280048 title "Distribution of antidepressant residues in wastewater and biosolids following different treatment processes by municipal wastewater treatment plants in Canada" @default.
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- W2003280048 doi "https://doi.org/10.1016/j.watres.2012.07.042" @default.
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