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Insights into the release of triclosan from microplastics in aquatic environment assessed with diffusive gradient in thin-films

The Science of The Total Environment 2023 3 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 35 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Chen Tu Chen Tu, Chen Tu Li Xu, Chen Tu Chen Tu, Chen Tu Li Xu, Yuwei Jia, Yuwei Jia, Sisi Liu, Yuwei Jia, Yuwei Jia, Chen Tu, Chen Tu, Chen Tu Chen Tu Yuwei Jia, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Yuwei Jia, Andrew J. Sweetman, Andrew J. Sweetman, Andrew J. Sweetman, Chang-Er Chen, Chang-Er Chen, Chang-Er Chen, Yue Gao, Yue Gao, Chen Tu Chen Tu Li Xu, Chen Tu Chen Tu Chen Tu Chen Tu Chen Tu Chen Tu Chen Tu Chen Tu Li Xu, Chen Tu Li Xu, Li Xu, Li Xu, Li Xu, Sisi Liu, Yue Gao, Chang-Er Chen, Guang‐Guo Ying, Xiao-Yuan Guo, Chen Tu, Chen Tu, Xiao-Yuan Guo, Andrew J. Sweetman, Li Xu, Li Xu, Yue Gao, Yue Gao, Li Xu, Chen Tu, Jian‐Liang Zhao, Chen Tu Yuwei Jia, Yuwei Jia, Li Xu, Li Xu, Andrew J. Sweetman, Andrew J. Sweetman, Li Xu, Li Xu, Li Xu, Li Xu, Sisi Liu, Yue Gao, Jian‐Liang Zhao, Chen Tu, Chen Tu, Chen Tu, Chen Tu Chen Tu Li Xu, Chen Tu Li Xu, Li Xu, Chen Tu Chen Tu, Li Xu, Andrew J. Sweetman, Li Xu, Chen Tu, Chen Tu Li Xu, Li Xu, Chen Tu, Chen Tu Jian‐Liang Zhao, Chen Tu Li Xu, Chen Tu Li Xu, Li Xu, Chen Tu Chen Tu Chen Tu Andrew J. Sweetman, Guang‐Guo Ying, Li Xu, Li Xu, Jian‐Liang Zhao, Chen Tu, Chen Tu, Chen Tu, Chen Tu Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Chen Tu, Li Xu, Sisi Liu, Yue Gao, Chen Tu Chen Tu Chen Tu Chang-Er Chen, Li Xu, Li Xu, Chen Tu Li Xu, Chen Tu, Li Xu, Chang-Er Chen, Li Xu, Yue Gao, Li Xu, Jian‐Liang Zhao, Jian‐Liang Zhao, Li Xu, Li Xu, Guang‐Guo Ying, Li Xu, Chen Tu, Li Xu, Chen Tu Chen Tu Chen Tu, Guang‐Guo Ying, Guang‐Guo Ying, Chang-Er Chen, Guang‐Guo Ying, Chen Tu, Chen Tu

Summary

Researchers investigated the adsorption and desorption kinetics of triclosan on polystyrene and polyvinyl chloride microplastics using batch experiments and diffusive gradients in thin-films (DGT), finding that pseudo-second-order kinetics best described both processes. DGT modelling revealed that PS held more triclosan with faster release kinetics (distribution coefficient K=5000 mL/g, response time T=10 s) compared to PVC (K=1000 mL/g, T=1000 s), and that pH and ionic strength interactively affected triclosan supply.

Polymers

PS PVC

Study Type Environmental

Organic chemicals associated with microplastics (MPs) can be released and thus pose potential risks during weathering processes. However, the thermodynamics and kinetics of their release processes still need to be better understood. Herein, the adsorption and desorption kinetics of triclosan on polystyrene (PS) and polyvinyl chloride (PVC) were investigated by using both batch experiments and diffusive gradients in thin-films (DGT) technique. The pseudo-second-order model fitted the data best, implying that both intraparticle diffusion and external liquid film diffusion influence the adsorption and desorption processes. DGT continuously accumulated triclosan from MP suspensions but slower than theoretical values, indicating some restrictions to desorption. The DGT-induced fluxes in Soils/Sediment (DIFS) model, employed to interpret DGT data, gave distribution coefficients for labile species (K) of 5000 mL g (PS) and 1000 mL g (PVC) and the corresponding response times (T) were 10 s and 1000 s, respectively. Higher K but smaller T for PS than PVC showed that more triclosan adsorbed on PS could be rapidly released, while there were some kinetic limitations for triclosan on PVC. A novel finding was that pH and ionic strength individually and interactively affected the supply of triclosan to DGT. This is the first study to quantify interactions of organics with MPs by using DGT, aiding our understanding of MPs' adsorption/desorption behavior in the aquatic environment.

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