微塑料对泰乐菌素的吸附动力学与热力学

以泰乐菌素（TYL）为目标有机污染物，系统研究了两种微塑料聚乙烯（PE）和聚氯乙烯（PVC）对泰乐菌素的吸附动力学与热力学.结果表明：PVC对泰乐菌素的吸附大于PE；吸附在36h可完全达到平衡，吸附动力学可以用二级动力学较好的拟合；颗粒扩散模型表明表面吸附和颗粒扩散是PE和PVC对TYL吸附的主要机理；吸附等温线可以用Henry模型较好拟合，说明泰乐菌素在PE和PVC上的吸附存在明显的线性分配规律，吸附热力学表明吸附过程是自发进行的；本研究可以为科学合理的评价微塑料在环境中的行为及其对环境中污染物的迁移转化的影响提供理论依据.

Sorption kinetics and thermodynamics study of tylosin by microplastics

Tylosin (TYL) was wsed as one representative organic pollutant, the sorption performance and mechanism of tylosin on two micro-plastics polyethylene (PE) and polyvinyl chloride (PVC) was systematically investigated. The sorption capacity of PVC was higher than that of PE. The results showed that the sorption of TYL on MPs reached equilibrium at 36h, and the sorption kinetics fitted pseudo-second-order kinetics well. The particle diffusion model showed that the surface sorption and particle diffusion model was the main mechanism for both PE and PVC. The sorption isotherm was consistent with Henry model, the results showed that the sorption of tylosin on PE and PVC had obvious distribution. The sorption thermodynamics showed such process was spontaneous. This study provided formation of pollutants in the natural environment.