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- W2327098686 abstract "To be able to use polyethylene passive samplers (PE) in the field, the partitioning constants between PE and water (KPEw) of the compounds examined must be known. The KPEws of triclosan (TCS), methyl-triclosan (MTCS), n-nonylphenol (n-NP), nonylphenol-technical mix (NP-tech), n-octylphenol (n-OP), and t-octylphenol (t-OP) were measured as a function of pH, temperature, and salinity, and a salt effect was calculated for TCS, n-OP, and t-OP. Log KPEws used for calculating dissolved concentrations were taken from 20 °C studies taking salt into account: 3.42 (TCS), 4.53 (MTCS), 4.20 (n-NP), 3.69 (n-OP), and 2.87 (t-OP). The KPEw of hydroxyl-group containing compounds were strongly affected by pH, whereas MTCS with its methoxy-group was not. Measured KPEws could not be estimated from octanol−water partitioning constants due to the semipolar makeup of the compounds investigated. Instead, a good correlation (KPEw = 0.679 × Khdw + 1.033, r2 = 0.984, p = 0.001) was obtained with hexadecane-water partitioning constants (Khdw) predicted from COSMOtherm. During deployments in Narragansett Bay (RI) in the fall of 2009, concentrations of MTCS and t-OP in surface and bottom waters ranged from 40−225 pg L−1 and 3.5−11 ng L−1, respectively. These concentrations are far below EC50 values for rainbow trout. Surface/bottom and bottom/porewater activity ratios were calculated. These indicated surface waters as the main source of MTCS, while surface water as well as sediments were sources of t-OP." @default.
- W2327098686 created "2016-06-24" @default.
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- W2327098686 date "2011-02-22" @default.
- W2327098686 modified "2023-10-03" @default.
- W2327098686 title "Development and Use of Polyethylene Passive Samplers To Detect Triclosans and Alkylphenols in an Urban Estuary" @default.
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- W2327098686 doi "https://doi.org/10.1021/es1040865" @default.
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