Water and Soil Quality Research Group, Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain.
Water and Soil Quality Research Group, Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain; Department of Materials Science and Physical Chemistry, Faculty of Chemistry, Martí i Franquès 1, 08028 Barcelona, Spain.
Environ Pollut. 2018 Apr;235:680-691. doi: 10.1016/j.envpol.2017.12.075. Epub 2018 Jan 12.
Plastic debris has become an environmental problem during recent years. Among the plastic debris, microplastics (<5 mm; MPLs) imply an extra problem due to their capacity to enter into the fauna through ingestion. In this work, we study the capacity of three MPLs, that include high-density polyethylene (HDPE), polystyrene (PS) and polystyrene carboxylate (PS-COOH), to sorb 18 perfluoroalkyl substances (PFASs; including carboxylic acids, sulphonates and one sulphonamide) from the surrounding waters (freshwater and seawater). Conclusions drawn from the results are that perfluoro sulphonates and sulphonamides have more tendency to be sorbed onto MPLs. In addition, PS and PS-COOH have more affinity for PFASs than HDPE. Finally, the increment of conductivity and pH of the water decreases the exposure time that is necessary to reach equilibrium. However, the presence of salts decreases the tendency of PFASs to be sorbed onto plastic surfaces. These results highlight the problem associated with the presence of MPLs in inland and marine waters since toxic compounds can be sorbed onto surrounding plastics that could be ingested by aquatic fauna.
近年来，塑料碎片已成为一个环境问题。在这些塑料碎片中，由于其能够通过摄入进入动物群，微塑料（<5 毫米；MPLs）构成了一个额外的问题。在这项工作中，我们研究了三种 MPLs（包括高密度聚乙烯（HDPE）、聚苯乙烯（PS）和聚苯乙烯羧酸酯（PS-COOH））从周围水域（淡水和海水）中吸附 18 种全氟烷基物质（PFAS；包括羧酸、磺酸盐和一种磺酰胺）的能力。从结果中得出的结论是，全氟磺酸盐和磺酰胺更倾向于被 MPLs 吸附。此外，PS 和 PS-COOH 比 HDPE 对 PFASs 具有更高的亲和力。最后，水的电导率和 pH 值的增加会降低达到平衡所需的暴露时间。然而，盐的存在会降低 PFASs 被吸附到塑料表面的趋势。这些结果突出了内陆和海洋水中存在 MPLs 所带来的问题，因为有毒化合物可以被吸附到周围的塑料上，而这些塑料可能会被水生动物摄入。
