Queensland Alliance for Environmental Health Science (QAEHS), The University of Queensland, 20 Cornwall street, Woolloongabba, Queensland 4102, Australia.
Queensland Alliance for Environmental Health Science (QAEHS), The University of Queensland, 20 Cornwall street, Woolloongabba, Queensland 4102, Australia.
Chemosphere. 2019 May;223:731-737. doi: 10.1016/j.chemosphere.2019.02.077. Epub 2019 Feb 14.
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 (K) and diffusion coefficients in the sampling material (D), for understanding uptake and kinetic limitations. In the present study, K and D for nine UVFs were estimated. K 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 K and log D ranged from 2.9 to 6.4 L kg and -11.1 to -10.5 ms, respectively. The sufficient high D 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 K.
近年来，有机紫外线滤光剂（UVFs）作为一组新兴的污染物引起了相当大的关注，包括在澳大利亚，那里 UVFs 的使用尤其相关。聚合物的被动采样已广泛用于常规监测水生环境中的化学物质。被动采样器用于监测水中化学物质的应用依赖于校准数据，例如化学物质的聚合物 - 水分配系数（K）和采样材料中的扩散系数（D），以了解吸收和动力学限制。在本研究中，估计了九种 UVFs 的 K 和 D。在不同的水 - 聚合物分配实验中确定了 K 值，其中（1）将一定量的化学物质剂量加入水中，（2）加入聚合物中。使用堆积法确定扩散系数。估计的 log K 和 log D 范围分别为 2.9 至 6.4 L kg 和 -11.1 至-10.5 ms。足够高的 D 允许应用仅考虑水边界控制吸收的动力学模型，以便使用所提出的 K 将硅酮采样器的吸收转化为水相浓度。
