Sorption properties of tylosin on four different microplastics
Sorption properties of tylosin on four different microplastics
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泰乐菌素对四种不同微塑料的吸附特性
DOI：
10.1016/j.chemosphere.2018.06.100
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发表时间：
2018-10-01
期刊：
影响因子：
8.8
通讯作者：
Jia, Hanzhong
中科院分区：
文献类型：
--
作者：
Guo, Xuetao;Pang, Jingwen;Jia, Hanzhong
经过氧化、磨损和破碎后，微塑料（MP）可以进入水环境并可能吸附周围的有机污染物，改变其迁移和空间分布。因此，研究MPs对有机污染物的吸附特性和机理，可以为其生态风险的科学评价提供理论依据。以泰乐菌素（TYL）为模型污染物，通过一系列间歇平衡实验考察MPs的吸附性能，结果发现TYL对MPs的吸附去除在36 h时达到平衡，TYL对MPs的吸附能力大小顺序为PE（聚乙烯）< PP（聚丙烯）< PS（聚苯乙烯）< PVC（聚乙烯） 氯化物）。准二阶模型很好地拟合了吸附动力学数据，并且Freundlich方程比Langmuir模型可以更好地描述吸附等温线。此外，初始溶液 pH 值和离子强度在整个吸附过程中发挥着重要作用。 TYL在MPs上的吸附过程主要受静电相互作用、表面络合和疏水相互作用的影响。 (C) 2018 Elsevier Ltd. 保留所有权利。
After oxidation, abrasion and crushing, microplastics (MPs) can enter the aqueous environment and may adsorb surrounding organic pollutants, altering its migration and spatial distribution. Therefore, an investigation of the sorption properties and mechanism of organic pollutant on MPs can offer a theoretical basis for scientific evaluation of their ecological risks. Using tylosin (TYL) as a model pollutant, the sorption performance of MPs was examined via a series of batch equilibrium experiments which resulted the sorptive removal of TYL on MPs reached equilibrium at 36 h, and the sorption ability of TYL on the MPs followed the order of PE (polyethylene) < PP (polypropylene) < PS (polystyrene) < PVC (polyvinyl chloride). The pseudo-second-order model well fit for the sorption kinetics data, and the adsorption isotherms could be better described by Freundlich equation rather than Langmuir model. Additionally, the initial solution pH and ionic strength played important roles across the adsorption. The sorption procedure of TYL on MPs was dominated by electrostatic interaction, surface complexation and hydrophobic interaction. (C) 2018 Elsevier Ltd. All rights reserved.