Effect of chlorination and ultraviolet on the adsorption of pefloxacin on polystyrene and polyvinyl chloride  

作　　者：Yanan Li Yaning Wu Kai Guo Weiqin Wu Meijing Yao 

机构地区：[1]School of Environmental Science and Engineering,Taiyuan University of Technology,Shanxi 030600,China

出　　处：《Journal of Environmental Sciences》2025年第3期21-34,共14页环境科学学报(英文版)

基　　金：supported by the Shanxi Scholarship Council of China(No.2023-054);the Applied Basic Research Project of Shanxi Province,China(No.20210302123121);the National Natural Science Foundation of China(No.52170045).

摘　　要：During thewater treatment process,chlorination and ultraviolet(UV)sterilization can modify microplastics(MPs)and alter their physicochemical properties,causing various changes between MPs and other pollutants.In this study,the impact of chlorination and UV modification on the physicochemical properties of polystyrene(PS)and polyvinyl chloride(PVC)were investigated,and the adsorption behavior of pefloxacin(PEF)before and after modificationwas examined.The effect of pH,ionic strength,dissolved organicmatter,heavymetal ions and other water environmental conditions on adsorption behavior was revealed.The results showed that PS had a higher adsorption capacity of PEF than PVC,and the modification increased the presence of O-containing functional groups in the MPs,thereby enhancing the adsorption capacity of both materials.Chlorination had a more significant impact on the physicochemical properties of MPs compared to UV irradiation within the same time period,leading to better adsorption performance of chlorination.The optimal pH for adsorption was found to be 6,and NaCl,sodium alginate and Cu2+would inhibit adsorption to varying degrees,among which the inhibition caused by pH was the strongest.Chlorination and UV modification would weaken the inhibitory effect of environmental factors on the adsorption of PEF by MPs.The main mechanisms of adsorption involved electrostatic interaction and hydrogen bonding.The study clarified the effects of modification on the physicochemical properties of MPs,providing reference for subsequent biotoxicity analysis and environmental protection studies.

关 键 词：Microplastics CHLORINATION ULTRAVIOLET PEFLOXACIN Adsorption mechanism 

分 类 号：TU991.25[建筑科学—市政工程]