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Sorption and desorption of selected pharmaceuticals by polyethylene microplastics

Marine Pollution Bulletin 2018 284 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Roger Mamitiana Razanajatovo, Jiannan Ding Shanshan Zhang, Jiannan Ding Jiannan Ding Jiannan Ding Hua Zou, Shanshan Zhang, Jiannan Ding Jiannan Ding Jiannan Ding Jiannan Ding Jiannan Ding Shanshan Zhang, Shanshan Zhang, Roger Mamitiana Razanajatovo, Roger Mamitiana Razanajatovo, Jiannan Ding Roger Mamitiana Razanajatovo, Hua Zou, Roger Mamitiana Razanajatovo, Shanshan Zhang, Hang Jiang, Hua Zou, Jiannan Ding Shanshan Zhang, Hang Jiang, Hua Zou, Hua Zou, Hua Zou, Hua Zou, Jiannan Ding Jiannan Ding Hua Zou, Hua Zou, Hua Zou, Jiannan Ding Hua Zou, Jiannan Ding

Summary

Researchers tested the sorption and desorption of three pharmaceuticals — sulfamethoxazole, propranolol, and sertraline — onto polyethylene microplastics in water, finding that all three compounds sorbed to the plastic surface and were only partially released over time. The results suggest microplastics can act as vectors for pharmaceutical compounds in aquatic environments, potentially affecting their bioavailability.

Polymers

The aim of the present study was to evaluate the sorption and desorption of sulfamethoxazole (SMX), propranolol (PRP) and sertraline (SER) by polyethylene (PE) microplastics in water. After the 96 h mixture, the sorption percentages of pharmaceuticals on PE microplastics decreased according to the following order: SER (28.61%) > PRP (21.61%) > SMX (15.31%). The sorption kinetics were fitted well with the pseudo-second-order model. Both linear and Freundlich models were able to describe the sorption isotherm. The results suggest that the sorption process of the pharmaceuticals may be adequately described by their hydrophobicity and electrostatic interactions. The desorption results showed that 8% and 4% of PRP and SER, respectively, were released from the microplastics within 48 h, but the sorption of SMX was irreversible. The results indicate the potential risks of PRP and SER for bioaccumulation in aquatic organisms via ingestion of the microplastics in aquatic environments.

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