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The adsorption and its mechanism of venlafaxine by original and aged polypropylene microplastic and the changes of joint toxicity

Journal of Environmental Management 2024 9 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Chuang Liu, Jiana Li Jindong Xu, Jiana Li Jiana Li Jiana Li Jiana Li Jiana Li Jindong Xu, Jiana Li Chuang Liu, Zhenglu Wang, Jindong Xu, Wenjing Zhang, Wenjing Zhang, Wenjing Zhang, Jindong Xu, Wenjing Zhang, Jiana Li Yang Yuan, Jiana Li Jiana Li Jiana Li Jiana Li Wenjing Zhang, Jindong Xu, Wenjing Zhang, Wenjing Zhang, Jiana Li Yang Yuan, Zhenglu Wang, Zhenglu Wang, Chuang Liu, Chuang Liu, Zhenglu Wang, Jiana Li Jiana Li Zhenglu Wang, Wenjing Zhang, Wenjing Zhang, Wenjing Zhang, Jiana Li Jiana Li Jiana Li Wenjing Zhang, Jiana Li Jiana Li Chuang Liu, Jiana Li Wenjing Zhang, Zhenglu Wang, Wenjing Zhang, Wenjing Zhang, Jiana Li Wenjing Zhang, Wenjing Zhang, Wenjing Zhang, Jiana Li Wenjing Zhang, Zhenglu Wang, Wenjing Zhang, Jiana Li Jiana Li Wenjing Zhang, Wenjing Zhang, Wenjing Zhang, Jiana Li Jiana Li

Summary

Researchers investigated how polypropylene microplastics from face masks interact with the antidepressant venlafaxine in water, finding that the plastics can absorb significant amounts of the drug within 24 hours. Aging of the microplastics through environmental weathering increased their ability to adsorb the medication. The study also found that the combination of microplastics and venlafaxine together produced greater toxic effects on test organisms than either contaminant alone.

Polymers

Models

Daphnia

Conjugation with the increment of consumption of polypropylene (PP) masks and antidepressants during pandemic, PP microplastics (MPs) and Venlafaxine (VEN) widely co-existed in surface waters. However, their environmental fate and the combined toxicity were unclear. Hence, we investigated the adsorption behaviors, and associated mechanisms of PP MPs for VEN. The impact factors including pH, salinity, and MPs aging were estimated. The results indicated PP MPs could adsorb amount of VEN within 24 h. The pseudo second-order kinetic model (R = 0.97) and Dubinin-Radushkevich model (R = 0.89) fitted well with the adsorption capacity of PP MPs for VEN, implying that chemical adsorption accompanied by electrostatic interaction might be the predominant mode for the interactions between PP MPs and VEN. Meanwhile, the adsorption capacity of PP MPs declined from pH of 2.5-4.5 and then increased from 4.5 to 9.5. The increased salinity (5-35 ppt) significantly suppressed the adsorption capacity. Aging by sunlight and UV triggered the formation of new functional group (carbonyl) on MPs, and then enhanced the adsorption capacity for VEN. Gaussian Model analysis further evidenced the electrostatic adsorption occurring in PP MPs and VEN. The combined exposure to PP MPs and VEN showed significantly antagonistic toxicity on Daphnia magna. The adsorption of VEN by PP MPs mitigated the lethal effects and behavioral function impairment posed by VEN on animals, implying the potential protective effects on zooplankton by PP MPs. This study for the first time provides perspective for assessing the environmental fate of MPs and antidepressants in aquatic system.

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