Sorption and desorption of selected pharmaceuticals by polyethylene microplastics
Sorption and desorption of selected pharmaceuticals by polyethylene microplastics
复制标题
聚乙烯微塑料对选定药物的吸附和解吸
DOI：
10.1016/j.marpolbul.2018.09.048
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发表时间：
2018-11-01
影响因子：
5.8
通讯作者：
Zou, Hua
中科院分区：
文献类型：
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作者：
Razanajatovo, Roger Mamitiana;Ding, Jiannan;Zou, Hua
研究了聚乙烯(PE)微塑料对水中磺胺甲恶唑(SMX)、心得安(PRP)和舍曲林(SER)的吸附和解吸性能。混合96h后，药物在PE微塑料上的吸附百分率依次为：Ser(28.61%)>；PRP(21.61%)&Gt；SMX(15.31%)。吸附动力学符合准二级模型。线性模型和Freundlich模型均能较好地描述吸附等温线。结果表明，药物的疏水性和静电相互作用可以很好地描述药物的吸附过程。解吸结果表明，在48h内，PEP和SER分别有8%和4%从微塑料中释放出来，而SMX的吸附是不可逆的。结果表明，PRP和SER通过摄取水环境中的微塑料而在水生生物中积累的潜在风险。
The aim of the present study was to evaluate the sorption and desorption of sulfamethoxazole (SMX), propranolol (PRP) and sertraline (SER) by polyethylene (PE) microplastics in water. After the 96 h mixture, the sorption percentages of pharmaceuticals on PE microplastics decreased according to the following order: SER (28.61%) > PRP (21.61%) > SMX (15.31%). The sorption kinetics were fitted well with the pseudo-second-order model. Both linear and Freundlich models were able to describe the sorption isotherm. The results suggest that the sorption process of the pharmaceuticals may be adequately described by their hydrophobicity and electrostatic interactions. The desorption results showed that 8% and 4% of PEP and SER, respectively, were released from the microplastics within 48 h, but the sorption of SMX was irreversible. The results indicate the potential risks of PRP and SER for bioaccumulation in aquatic organisms via ingestion of the microplastics in aquatic environments.