Adsorption of Diclofenac Sodium by Aged Degradable and Non-Degradable Microplastics: Environmental Effects, Adsorption Mechanisms
Toxics2022
21 citations
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Kangkang Wang,
Kefu Wang,
Kangkang Wang,
Kefu Wang,
Kefu Wang,
Siqi Liang,
Siqi Liang,
Tao Wang,
Siqi Liang,
Siqi Liang,
Kangkang Wang,
Kefu Wang,
Kangkang Wang,
Kangkang Wang,
Kefu Wang,
Tao Wang,
Tao Wang,
Tao Wang,
Tao Wang,
Kefu Wang,
Yuli Kou,
Kangkang Wang,
Kangkang Wang,
Kangkang Wang,
Kangkang Wang,
Kangkang Wang,
Tao Wang,
Wei Wang
Tao Wang,
Tao Wang,
Yuli Kou,
Yuli Kou,
Yuli Kou,
Yuli Kou,
Yuli Kou,
Changyan Guo,
Kefu Wang,
Kefu Wang,
Kefu Wang,
Yuli Kou,
Yuli Kou,
Yuli Kou,
Yuli Kou,
Kangkang Wang,
Changyan Guo,
Kangkang Wang,
Wei Wang
Wei Wang
Kefu Wang,
Kefu Wang,
Kefu Wang,
Siqi Liang,
Siqi Liang,
Kefu Wang,
Kefu Wang,
Kangkang Wang,
Wei Wang
Kangkang Wang,
Wei Wang
Siqi Liang,
Wei Wang
Tao Wang,
Siqi Liang,
Changyan Guo,
Changyan Guo,
Siqi Liang,
Wei Wang
Kangkang Wang,
Tao Wang,
Tao Wang,
Tao Wang,
Tao Wang,
Tao Wang,
Tao Wang,
Wei Wang
Wei Wang
Wei Wang
Tao Wang,
Wei Wang
Yuli Kou,
Yuli Kou,
Kefu Wang,
Kefu Wang,
Changyan Guo,
Changyan Guo,
Changyan Guo,
Changyan Guo,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Yuli Kou,
Yuli Kou,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Wei Wang
Tao Wang,
Siqi Liang,
Wei Wang
Siqi Liang,
Tao Wang,
Changyan Guo,
Wei Wang
Changyan Guo,
Wei Wang
Tao Wang,
Changyan Guo,
Tao Wang,
Changyan Guo,
Tao Wang,
Changyan Guo,
Changyan Guo,
Wei Wang
Jide Wang,
Wei Wang
Changyan Guo,
Wei Wang
Wei Wang
Changyan Guo,
Tao Wang,
Changyan Guo,
Tao Wang,
Wei Wang
Jide Wang,
Jide Wang,
Wei Wang
Jide Wang,
Wei Wang
Jide Wang,
Wei Wang
Wei Wang
Jide Wang,
Wei Wang
Wei Wang
Jide Wang,
Jide Wang,
Wei Wang
Jide Wang,
Jide Wang,
Jide Wang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Siqi Liang,
Jide Wang,
Jide Wang,
Jide Wang,
Jide Wang,
Kangkang Wang,
Jide Wang,
Kangkang Wang,
Wei Wang
Siqi Liang,
Wei Wang
Wei Wang
Tao Wang,
Wei Wang
Wei Wang
Jide Wang,
Jide Wang,
Wei Wang
Jide Wang,
Jide Wang,
Jide Wang,
Jide Wang,
Wei Wang
Wei Wang
Wei Wang
Wei Wang
Wei Wang
Wei Wang
Summary
Researchers found that UV aging of both polystyrene and biodegradable PBAT microplastics increased their surface oxidation and hydrophilicity, enhancing their capacity to adsorb the pharmaceutical pollutant diclofenac sodium through surface interaction and pore-filling mechanisms.
Microplastics (MPs) are novel pollutants, which can carry toxic contaminants and are released in biota and accumulate. The adsorption behavior of MPs and aged MPs has attracted extensive attention. In this paper, the aging process of polystyrene (PS) and poly (butyleneadipate-co-terephthalate) (PBAT) plastics under ultraviolet (UV) irradiation at a high temperature and their adsorption properties for the contaminant diclofenac sodium (DCF) before and after aging was investigated. There are many factors affecting the adsorption capacity of MPs. In this experiment, three aspects of MPs, organic pollutants, and environmental factors are explored. The Freundlich model as well as the pseudosecondary kinetic model is more applicable to the process of DCF adsorption by MPs. The main effects of adsorption of organic pollutants by MPs are electrostatic interactions, hydrogen-halogen bonds, and hydrophobic interactions. The adsorption capacity of the UV-aged MPs on DCF is significantly enhanced, and the order of adsorption capacity is Q(A-PBAT) (27.65 mg/g) > Q (A-PS) (23.91 mg/g) > Q (PBAT) (9.30 mg/g) > Q (PS) (9.21 mg/g). The results show that more active sites are generated on the surface of MPs after aging, which can enhance their adsorption capacity for organic pollutants. This adsorption mechanism will increase their role as contaminant carriers in the aquatic food chain.