期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 156, 期 -, 页码 176-182出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2018.03.021
关键词
Microplastics; Mangrove sediment; WEOM/L-WEOM; Polycyclic aromatic hydrocarbons
资金
- National Natural Science Foundation of China [91428203, 41673105, 41473118]
- Guangxi Ba-Gui Fellowship [2014A010]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据