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Adsorption of triclosan onto different aged polypropylene microplastics: Critical effect of cations

Wu, Xiaowei, Liu, Peng, Huang, Hexinyue, Gao, Shixiang·2020·Science of The Total Environment

Abstract

Adsorption of organic contaminants onto aged microplastics (MPs) may be important in understanding their transport potential and ecological risks in aquatic environment. Cations of Na+ and Ca2+ are common electrolytes in water, which can greatly influence the adsorption behavior of MPs by impacting the electrostatic interaction between MPs and organic contaminants. The results of this study showed that aged isotactic polypropylene (iPP) MPs exhibited higher adsorption capacity to triclosan (TCS) than pristine ones, and the sorption affinity was enhanced with the increase of ionic concentrations. The crucial influence of cations on the adsorption behavior of aged MPs mainly depended on the changed properties of TCS and interactions between MPs and TCS. Salting out effect induced the precipitation of TCS from water and facilitated the partition of TCS onto MPs in high salinity water. Besides, compressing electrostatic double layer of MPs via squeezing out effect and bridging effect between functional groups of aged MPs and contaminants may also be significant factors in the sorption process. These findings will be helpful for understanding the role of cations on the transport of pollutants, the fate of MPs and their associated environmental risks in aquatic ecosystems.

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Metadata

Authors
Wu, X., Liu, P., Huang, H., & Gao, S.
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2020-05
Volume
717
Pages
137033
ISSN
0048-9697 (ISSN-L)
OpenAlex
W3004030973
Cited by
197
References
3
FWCI
6.66
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Adsorption of triclosan onto different aged polypropylene microplastics: Critical effect of cations. https://app.cochat.ai/papers/10.1016/j.scitotenv.2020.137033
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Wu, X., Liu, P., Huang, H., & Gao, S. (2020). Adsorption of triclosan onto different aged polypropylene microplastics: Critical effect of cations. Science of The Total Environment. https://doi.org/10.1016/j.scitotenv.2020.137033

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