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The implications of water extractable organic matter (WEOM) on the sorption of typical parent, alkyl and N/O/S-containing polycyclic aromatic hydrocarbons (PAHs) by microplastics

文献类型： 外文期刊

作者： Li, Ruilong 1 ; Tan, Huadong 4 ; Zhang, Linlin 1 ; Wang, Shaopeng 1 ; Wang, Yinghui 1 ; Yu, Kefu 1 ;

作者机构： 1.Guangxi Univ, Sch Marine Sci, Nanning 530004, Peoples R China

2.Guangxi Univ, Coral Reef Res Ctr China, Alarming 530004, Peoples R China

3.Guangxi Univ, Guangxi Lab Study Coral Reefs South China Sea, Nanning 530004, Peoples R China

4.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 361102, Hainan, Peoples R China

5.Minist Agr, Danzhou Sci Observing & Expt Stn Agroenvironm, Danzhou 571737, Peoples R China

关键词： Microplastics; Mangrove sediment; WEOM/L-WEOM; Polycyclic aromatic hydrocarbons

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2018 年 156 卷

页码：

收录情况： SCI

摘要： Microplastics sorption of persistent organic pollutants (POPs) was the core processes that cause negative effects to biota, and their influencing factors and related mechanisms are poorly understood. In this study, we explored the impacts of water extractable organic matter (WEOM), an important source of endogenous dissolved organic matter in mangrove sediment, on the sorption coefficients of typical parent, alkyl and N/O/S-containing poly cyclic aromatic hydrocarbons (PAHs) by microplastics. The presence of L-WEOM (D) impeded the PAHs sorption as the coefficients (K-f) decreased to 10.17 (mu g/kg)/(mu g/L)(n) and to 8.39 (mu g/kg)/(mu g/L)(n) for fluorene (Flu) and 1-methyl-fluorene (1-M-Flu), respectively. The K-f exhibited good linear relationships with the aliphaticity of L-WEOM (p < 0.05) rather than the aromatic carbon/alkyl carbon content (p > 0.05). Under the presences of L-WEOM (D), (S) and (K), the lone pair electrons of N/O/S-containing PAHs was the dominant factor contributing to the obvious difference of the K-f values from the other groups. Moreover, the largest impact of L-WEOM (D) on the Flu sorption was in the case of PVC microplastics, while almost no effect was in the case of PS microplastics. The findings of our work may be helpful in improving our understanding of the role of WEOM on the sorption of PAHs to microplastics in the field mangrove sediment.

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