title: Late season pharmaceutical fate in wetland mesocosms with and without phosphorous addition.
abstract: The fate of six human-use drugs was assessed and predicted in mesocosms designed to mimic shallow constructed wetlands during the onset of fall and senescence. Mesocosms were monitored for 28 days after the addition of carbamazepine, clofibric acid, fluoxetine and naproxen (nominal initial concentrations of 5 μg/L each), sulfamethoxazole, and sulfapyridine (nominal initial concentrations of 150 μg/L each), with and without phosphorous (P) addition at 1.6 mg/L. We hypothesized that addition of P would stimulate primary productivity and enhance removal of pharmaceuticals from the water column. Carbamazepine, clofibric acid, fluoxetine, and naproxen had half-lives of 8.7, 11, 1.5, and 2.5, and 8.6, 11.0, 1.4, and 2.5 days in treatments with and without P amendment, respectively. Sulfamethoxazole and sulfapyridine had half-lives of 17 and 4.9 days in mesocosms with P amendment and 17 and 4.7 days without amendment. A concurrent pulse of P with pharmaceuticals did not significantly enhance the removal of these compounds. Predicted half-lives from modeling efforts were consistent with observed values, with photolysis the greatest contributor to chemical attenuation.
authors: Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.|Richardson College for the Environment, Department of Environmental Studies and Sciences and Department of Chemistry, The University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.
authors: Pascal
authors: P
authors: Cardinal
authors: Richardson College for the Environment, Department of Environmental Studies and Sciences and Department of Chemistry, The University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.
authors: Julie C
authors: JC
authors: Anderson
authors: Richardson College for the Environment, Department of Environmental Studies and Sciences and Department of Chemistry, The University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.|Department of Environment and Geography, University of Manitoba, 252 Wallace Building, Winnipeg, MB, R3T 2N2, Canada.
authors: Jules C
authors: JC
authors: Carlson
authors: Richardson College for the Environment, Department of Environmental Studies and Sciences and Department of Chemistry, The University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.
authors: Jennifer E
authors: JE
authors: Low
authors: Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.|Richardson College for the Environment, Department of Environmental Studies and Sciences and Department of Chemistry, The University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.
authors: Jonathan K
authors: JK
authors: Challis
authors: Department of Chemistry, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.|Richardson College for the Environment, Department of Environmental Studies and Sciences and Department of Chemistry, The University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.
authors: Charles S
authors: CS
authors: Wong
authors: Department of Environment and Geography, University of Manitoba, 252 Wallace Building, Winnipeg, MB, R3T 2N2, Canada. mark.hanson@umanitoba.ca.
authors: Mark L
authors: ML
authors: Hanson
mesh_terms: D001673:Biodegradation, Environmental; D002220:Carbamazepine / Q000737:chemistry; D006207:Half-Life; D009288:Naproxen / Q000737:chemistry; D004364:Pharmaceutical Preparations / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D010782:Photolysis; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D053833:Wetlands
chemical_list: D004364:Pharmaceutical Preparations; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D002220:Carbamazepine; D009288:Naproxen
keywords: Macrophytes; Pharmaceutical fate; Treatment wetland; Wastewater