Department of Ocean System Engineering, Gyeongsang National University, Tongyeong 53064, Republic of Korea.
Marine Environmental Impact Assessment Center, National Institute of Fisheries Science, Busan 46083, Republic of Korea.
Sci Total Environ. 2021 Jul 1;776:146005. doi: 10.1016/j.scitotenv.2021.146005. Epub 2021 Feb 22.
Solvent-treated poly(methyl methacrylate) (PMMA) was recently introduced as a passive sampler for determining bioavailable concentrations, i.e., freely dissolved concentrations. However, the much knowledge required to obtain accurate bioavailable concentrations using the thus treated PMMA, applied in a marine environment, is still lacking. In this study, uptake experiments with PMMA after solvent treatment were conducted to investigate its uptake capacity and the effects of water temperature and salinity on the PMMA-water partition coefficient (K) for polycyclic aromatic hydrocarbons (PAHs). Thus, PMMA passive samplers preloaded with performance reference compounds were exposed to seawater to first estimate the deployment time and then to confirm if the PMMA could give the residual concentrations of PAH in mussel. The less hydrophobic PAHs (log octanol-water partition coefficient < 5.5) had higher uptake capacity of PMMA-uptake was increased by a factor of up to 10. Whereas for these PAHs the K values and seawater temperature showed a parabolic relationship, the effect of salinity on K was not observed. The less hydrophobic PAH concentrations in seawater can be measured using the PMMA passive sampler over a period of about three weeks. For the PAHs detected in both PMMA and mussel, the PAH concentrations in mussel predicted from PMMA were found to be within one order of magnitude of the measured concentrations. This, therefore, suggests that solvent-treated PMMA could be used as a passive sampler to provide information on bioavailable concentrations for less hydrophobic PAHs.
溶剂处理的聚甲基丙烯酸甲酯（PMMA）最近被引入作为一种被动采样器，用于测定生物有效浓度，即自由溶解浓度。然而，在海洋环境中应用经如此处理的 PMMA 来获得准确的生物有效浓度所需的知识仍然缺乏。在这项研究中，进行了溶剂处理后的 PMMA 吸收实验，以研究其吸收能力以及水温和盐度对多环芳烃（PAH）的 PMMA-水分配系数（K）的影响。因此，用性能参考化合物预加载的 PMMA 被动采样器被暴露于海水中，首先估计部署时间，然后确认 PMMA 是否可以给出贻贝中 PAH 的残留浓度。疏水性较低的 PAH（log 辛醇-水分配系数 < 5.5）对 PMMA 的吸收能力更高，吸收能力增加了 10 倍。对于这些 PAH，K 值和海水温度呈抛物线关系，而盐度对 K 的影响则未观察到。疏水性较低的 PAH 浓度可以使用 PMMA 被动采样器在大约三周的时间内进行测量。对于在 PMMA 和贻贝中都检测到的 PAH，从 PMMA 预测的贻贝中的 PAH 浓度被发现与测量浓度在一个数量级内。因此，这表明溶剂处理的 PMMA 可以用作被动采样器，为疏水性较低的 PAH 提供生物有效浓度的信息。
