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Comparing the sorption of pyrene and its derivatives onto polystyrene microplastics: Insights from experimental and computational studies

文献类型： 外文期刊

作者： Yang, Chenghu 1 ; Wu, Wei 1 ; Zhou, Xiaotian 1 ; Hao, Qing 1 ; Li, Tiejun 1 ; Liu, Yangzhi 1 ;

作者机构： 1.Marine Fisheries Res Inst Zhejiang, Key Lab Sustainable Utilizat Technol Res Fishery, Zhoushan 316021, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Environm Resources Soil & Fertilizers, Hangzhou 310021, Peoples R China

3.Zhejiang Ocean Univ, Marine & Fishery Inst, Zhoushan 316021, Peoples R China

关键词： Microplastics; Polycyclic aromatic hydrocarbons; Sorption; Pyrene; Substituent

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

ISSN： 0025-326X

年卷期： 2021 年 173 卷

页码：

收录情况： SCI

摘要： In this study, the sorption behaviors and mechanisms between polystyrene micmplastics (micro-PS) and 4-rings polycyclic aromatic hydrocarbons (PAHs) pyrene (Pyr) and its derivatives (5-Pyr), including 1-methylpyrene (P-CH3), 1-hydroxypyrene (P-OH), 1-aminopyrene (P-NH2), 1-pyrenecarboxylic acid (P-COOH) were investigated at neutrality. The results revealed that the sorption rates of micro-PS for 5-Pyr were higher than those for parent Pyr. Meanwhile, -CH3 could slightly facilitate the sorption, whereas -OH, P-NH2, and P-COOH intensively inhibit the sorption of 5-Pyr onto micro-PS. The sorption capacities of Pyr/S-Pyr increased with decreasing size of micro-PS. Besides, the effects of salinity and temperature on the sorption characteristics of micro-PS for Pyr/S-Pyr depended on their substituents. Combined with experimental and computational methods, it could be concluded that the main sorption mechanisms were possibly hydrophobic interaction, pi-pi interaction and pore-filling. The observations reported here could improve predictions of environmental behaviors and bioavailability of PAHs and micro-PS.

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