Enhanced desorption of persistent organic pollutants from microplastics under simulated physiological conditions

被引：783

作者：

Bakir, Adil ^{[1
,2
]}

Rowland, Steven J. ^{[2
]}

Thompson, Richard C. ^{[1
]}

机构：

[1] Univ Plymouth, Sch Marine Sci & Engn, MBERC, Plymouth PL4 8AA, Devon, England

[2] Univ Plymouth, Sch Marine Sci & Engn, PEGG, Plymouth PL4 8AA, Devon, England

来源：

ENVIRONMENTAL POLLUTION | 2014年 / 185卷

关键词：

Marine Strategy Framework Directive; Microplastic; Hydrophobic organic compounds; Desorption; Gut surfactant; POLYCYCLIC AROMATIC-HYDROCARBONS; CRITICAL MICELLE CONCENTRATION; SEA-SURFACE MICROLAYER; PLASTIC DEBRIS; MARINE-SEDIMENTS; PELLETS; ENVIRONMENT; SORPTION; WATER; TEMPERATURE;

D O I：

10.1016/j.envpol.2013.10.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microplastics have the potential to uptake and release persistent organic pollutants (POPs); however, subsequent transfer to marine organisms is poorly understood. Some models estimating transfer of sorbed contaminants to organisms neglect the role of gut surfactants under differing physiological conditions in the gut (varying pH and temperature), examined here. We investigated the potential for polyvinylchloride (PVC) and polyethylene (PE) to sorb and desorb C-14-DDT, C-14-phenanthrene (Phe), C-14-perfluorooctanoic acid (PFOA) and C-14-di-2-ethylhexyl phthalate (DEHP). Desorption rates of POPs were quantified in seawater and under simulated gut conditions. Influence of pH and temperature was examined in order to represent cold and warm blooded organisms. Desorption rates were faster with gut surfactant, with a further substantial increase under conditions simulating warm blooded organisms. Desorption under gut conditions could be up to 30 times greater than in seawater alone. Of the POP/plastic combinations examined Phe with PE gave the highest potential for transport to organisms. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：16 / 23

页数：8

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