title: Erratum: Probabilistic application of a fugacity model to predict triclosan fate during wastewater treatment.
abstract: The fate and partitioning of the antimicrobial compound, triclosan, in wastewater treatment plants (WWTPs) is evaluated using a probabilistic fugacity model to predict the range of triclosan concentrations in effluent and secondary biosolids. The WWTP model predicts 84% to 92% triclosan removal, which is within the range of measured removal efficiencies (typically 70% to 98%). Triclosan is predominantly removed by sorption and subsequent settling of organic particulates during primary treatment and by aerobic biodegradation during secondary treatment. Median modeled removal efficiency due to sorption is 40% for all treatment phases and 31% in the primary treatment phase. Median modeled removal efficiency due to biodegradation is 48% for all treatment phases and 44% in the secondary treatment phase. Important factors contributing to variation in predicted triclosan concentrations in effluent and biosolids include influent concentrations, solids concentrations in settling tanks, and factors related to solids retention time. Measured triclosan concentrations in biosolids and non-United States (US) effluent are consistent with model predictions. However, median concentrations in US effluent are over-predicted with this model, suggesting that differences in some aspect of treatment practices not incorporated in the model (e.g., disinfection methods) may affect triclosan removal from effluent. Model applications include predicting changes in environmental loadings associated with new triclosan applications and supporting risk analyses for biosolids-amended land and effluent receiving waters.
authors.affiliation: ENVIRON International Corporation, Portland, Maine 04101, USA. mbock@environcorp.com
authors.forename: Michael
authors.initials: M
authors.lastname: Bock
authors.forename: Jennifer
authors.initials: J
authors.lastname: Lyndall
authors.forename: Timothy
authors.initials: T
authors.lastname: Barber
authors.forename: Phyllis
authors.initials: P
authors.lastname: Fuchsman
authors.forename: Elyse
authors.initials: E
authors.lastname: Perruchon
authors.forename: Marie
authors.initials: M
authors.lastname: Capdevielle
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D015233:Models, Statistical; D011312:Pressure; D014260:Triclosan / Q000032:analysis* / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D004785:Environmental Pollutants; D014260:Triclosan