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The sorption kinetics and isotherms of sulfamethoxazole with polyethylene microplastics

Xu, Baile, Liu, Fei, Brookes, Philip C., Xu, Jianming·2018·Marine Pollution Bulletin

Abstract

Microplastics and sulfamethoxazole coexist ubiquitously in the marine environment, and microplastics tend to sorb organic pollutants from the surrounding environment. Here, the sorption kinetics and isotherms of sulfamethoxazole on polyethylene (PE) microplastics closely fitted a pseudo-second-order model (R2 = 0.98) and linear model (R2 = 0.99), respectively, indicating that the sorption process was partition-dominant interaction. The main binding mechanism was possibly the van der Waals interaction for hydrophilic sulfamethoxazole onto hydrophobic PE microplastics. The effects of pH, dissolved organic matter and salinity on sorption behavior were also studied. The sorption behavior of sulfamethoxazole on PE microplastics was not significantly influenced by pH and salinity, probably because the electrostatic repulsion played a minor role. In addition, the negligible effect of dissolved organic matter was attributed to the greater affinity of sulfamethoxazole to PE microplastics than to dissolved organic matter. Our results demonstrated that PE microplastics may serve as a carrier for sulfamethoxazole in the aquatic environment.

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Metadata

Authors
Xu, B., Liu, F., Brookes, P. C., & Xu, J.
Venue
Marine Pollution Bulletin
Publisher
Elsevier BV
Published
2018-06
Volume
131
Issue
Pt A
Pages
191-196
ISSN
0025-326X (ISSN-L)
OpenAlex
W2803012718
Cited by
292
References
41
FWCI
8.12
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: The sorption kinetics and isotherms of sulfamethoxazole with polyethylene microplastics. https://app.cochat.ai/papers/10.1016/j.marpolbul.2018.04.027
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Xu, B., Liu, F., Brookes, P. C., & Xu, J. (2018). The sorption kinetics and isotherms of sulfamethoxazole with polyethylene microplastics. Marine Pollution Bulletin. https://doi.org/10.1016/j.marpolbul.2018.04.027

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