Calibration parameters for the passive sampling of organic UV filters by silicone; diffusion coefficients and silicone–water partition coefficients
| Autor: | Sarit Kaserzon, Foppe Smedes, Jochen F. Mueller, Rory Verhagen, Elissa O'Malley |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Materials science Polymers Ultraviolet Rays Health Toxicology and Mutagenesis 0208 environmental biotechnology Silicones Analytical chemistry 02 engineering and technology 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Silicone Calibration Environmental Chemistry Partition (number theory) Organic Chemicals Diffusion (business) 0105 earth and related environmental sciences chemistry.chemical_classification Australia Public Health Environmental and Occupational Health Aqueous two-phase system Water Sampling (statistics) General Medicine General Chemistry Polymer Pollution 6. Clean water 020801 environmental engineering Partition coefficient chemistry 13. Climate action Filtration Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Chemosphere. 223:731-737 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2019.02.077 |
| Popis: | In recent years, organic ultraviolet filters (UVFs) received considerable attention as a group of emerging contaminants, including in Australia where the use of UVFs is particularly relevant. Passive sampling using polymers has become widely used for routine monitoring of chemicals in the aquatic environment. Application of passive samplers for monitoring chemicals in the water relies on calibration data such as chemical's polymer-water partition coefficient (Kpw) and diffusion coefficients in the sampling material (Dp), for understanding uptake and kinetic limitations. In the present study, Kpw and Dp for nine UVFs were estimated. Kpw values were determined in different water – polymer partition experiments where (1) a given mass of chemicals was dosed into the water and (2) into the polymer. Diffusion coefficients were determined using the stacking method. The estimated log Kpw and log Dp ranged from 2.9 to 6.4 L kg−1 and -11.1 to −10.5 m2s-1, respectively. The sufficient high Dp allows application of kinetic models that only consider water boundary-controlled uptake for converting silicone sampler uptake into an aqueous phase concentration using the presented Kpw. |
| Databáze: | OpenAIRE |
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