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Effects of Biofilms on Trace Metal Adsorption on Plastics in Freshwater Systems

International Journal of Environmental Research and Public Health 2022 17 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.

Lingzhan Miao, Lingzhan Miao, Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Lingzhan Miao, Jun Hou, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Tanveer M. Adyel Zhilin Liu, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Zhilin Liu, Jun Wu, Jun Hou, Lingzhan Miao, Lingzhan Miao, Jun Hou, Jun Hou, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Jun Hou, Jun Wu, Jianchao Liu, Jun Hou, Tanveer M. Adyel Jun Hou, Jun Hou, Jun Hou, Jun Hou, Lingzhan Miao, Jun Hou, Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Lingzhan Miao, Tanveer M. Adyel Jun Wu, Tanveer M. Adyel Jun Wu, Lingzhan Miao, Jun Wu, Jun Wu, Zhiyuan Wang, Jun Wu, Jun Wu, Jun Hou, Jianchao Liu, Jun Wu, Jun Wu, Jun Wu, Jun Wu, Jun Wu, Jun Wu, Zhilin Liu, Jun Wu, Tanveer M. Adyel Tanveer M. Adyel Jun Hou, Jun Hou, Lingzhan Miao, Jun Wu, Jun Wu, Jun Wu, Lingzhan Miao, Tanveer M. Adyel Jun Wu, Jun Hou, Lingzhan Miao, Jun Wu, Jun Wu, Tanveer M. Adyel Lingzhan Miao, Jun Wu, Lingzhan Miao, Jun Wu, Jianchao Liu, Jun Wu, Tanveer M. Adyel Tanveer M. Adyel Tanveer M. Adyel Jun Wu, Jun Hou, Jun Hou, Jun Hou, Jun Hou, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Jianchao Liu, Jianchao Liu, Jianchao Liu, Jianchao Liu, Jianchao Liu, Zhilin Liu, Zhilin Liu, Zhilin Liu, Zhilin Liu, Zhilin Liu, Jun Hou, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Tanveer M. Adyel Lingzhan Miao, Lingzhan Miao, Jun Wu, Lingzhan Miao, Tanveer M. Adyel Jianchao Liu, Lingzhan Miao, Jianchao Liu, Jianchao Liu, Jianchao Liu, Jun Hou, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Lingzhan Miao, Jun Hou, Jun Hou, Jianchao Liu, Lingzhan Miao, Jun Hou, Jun Hou, Jun Hou, Zhilin Liu, Jun Hou, Jun Hou, Lingzhan Miao, Jun Hou, Jun Wu, Jun Hou, Tanveer M. Adyel Jun Wu, Jun Hou, Jun Hou, Jun Hou, Tanveer M. Adyel Jun Hou, Tanveer M. Adyel Jun Hou, Jun Hou, Tanveer M. Adyel Jun Hou, Jun Hou, Tanveer M. Adyel Tanveer M. Adyel

Summary

Researchers incubated polypropylene and PET plastic debris in three freshwater bodies for 45 days to develop biofilms, then conducted batch adsorption experiments, finding that biofilm formation significantly increased trace metal adsorption capacity -- particularly for lead -- with adsorption well described by the Langmuir model.

Polymers

PE PET PP

Study Type Environmental

The formation of plastisphere on plastics and their potential impact on freshwater ecosystems have drawn increasing attention. However, there is still limited information about the effects of plastisphere on the heavy metal adsorption capacity and the related mechanism of plastic debris in different freshwaters. Herein, the trace metal adsorption capacity, kinetics and adsorption mechanisms of virgin and biofilm-covered plastic debris were investigated. Polypropylene (PP) and polyethylene terephthalate (PET) plastic debris were placed in three freshwaters (Xuanwu Lake, Donghu Lake and the Qinhuai River) for 45 days to incubate biofilms. Batch adsorption experiments were performed to compare the adsorption processes of trace metal on virgin and biofilm-covered plastics. Results showed that biofilms increase the adsorption of metals on plastics, and the adsorption isotherms were well fitted by the Langmuir model. Furthermore, the adsorption capacities for lead (Pb(II)) were higher than that of cadmium (Cd(II)) and zinc (Zn(II)), with 256.21 and 277.38 μg/g (Pb(II)) adsorbed in biofilm-covered PP and PET, respectively, in Xuanwu Lake. The adsorption kinetics of metals on plastic debris were significantly affected by the biofilms, by switching the intraparticle diffusion for virgin plastic debris to film diffusion for the biofilm-covered plastic debris. Moreover, the complexation of functional groups within the biofilms might mainly contribute to the increases of metal adsorption, involving the participation of oxygen and nitrogen groups. Overall, these results suggested that biofilms reinforce the potential role of plastics as a carrier of trace metals in freshwaters.

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