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How do microplastics adsorb metals? A preliminary study under simulated wetland conditions

Chemosphere 2022 43 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.

Jia-Rui Niu, Shuli Liu, Wenhua Li, Jia-Rui Niu, Elvis Genbo Xu Minfei Jian, Elvis Genbo Xu Minfei Jian, Shuli Liu, Minfei Jian, Shuli Liu, Shuli Liu, Shuli Liu, Minfei Jian, Minfei Jian, Yuyue Huang, Elvis Genbo Xu Wenhua Li, Yuyue Huang, Yuyue Huang, Jia-Rui Niu, Minfei Jian, Minfei Jian, Minfei Jian, Minfei Jian, Minfei Jian, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Minfei Jian, Elvis Genbo Xu Minfei Jian, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Jia-Rui Niu, Yuyue Huang, Shuli Liu, Elvis Genbo Xu Wenhua Li, Elvis Genbo Xu Wenhua Li, Elvis Genbo Xu Elvis Genbo Xu Minfei Jian, Elvis Genbo Xu Elvis Genbo Xu Wenhua Li, Wenhua Li, Wenhua Li, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Minfei Jian, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Shuli Liu, Yuyue Huang, Yuyue Huang, Yuyue Huang, Yuyue Huang, Yuyue Huang, Zheng Lai, Wenhua Li, Wenhua Li, Zheng Lai, Wenhua Li, Elvis Genbo Xu Shuli Liu, Elvis Genbo Xu Shuli Liu, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Shuli Liu, Yu Hao, Shuli Liu, Elvis Genbo Xu Minfei Jian, Minfei Jian, Shuli Liu, Zheng Lai, Minfei Jian, Elvis Genbo Xu Shuli Liu, Elvis Genbo Xu Minfei Jian, Minfei Jian, Zheng Lai, Shuli Liu, Shuli Liu, Shuli Liu, Shuli Liu, Shuli Liu, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Shuli Liu, Elvis Genbo Xu Shuli Liu, Shuli Liu, Elvis Genbo Xu Shuli Liu, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Minfei Jian, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu

Summary

Researchers investigated how different plastic polymer types adsorb metals under conditions simulating the Poyang Lake wetland environment, including sediment, water chemistry, and organic matter. Adsorption capacity varied substantially between polymer types, with aged and weathered plastics showing higher metal uptake than pristine particles, and wetland-specific chemistry influencing adsorption mechanisms.

Polymers

PE PP PS

Study Type Environmental

Microplastics (MPs) are widely detected in wetlands as emerging pollutants of global concern. Co-occurrence of MPs and trace metals in wetlands is common and the vector effects of MPs on other environmental pollutants have been increasingly reported. However, the interaction of different MPs and trace metals under environmentally realistic conditions is not well understood. Here, we investigated the adsorption capacity of MPs for metals under simulated conditions of Poyang Lake wetlands in Jiang Xi, China, a Ramsar site of international importance for conservation and sustainable use. ICP-MS was used to quantify the amount of adsorbed metals onto different types of MPs. SEM-EDS and micro-FTIR were used to examine the morphological and chemical characteristics of MPs before and after metal adsorption. The influence of internal (polymer types and particle sizes of MPs) and external factors (water pH values, organic matters, ion strength, and sediment) on metal adsorption was systematically investigated. Metal adsorption equilibrium was most achieved at 72 h. The adsorption capacity of MP types to metal ions tended to decrease as PP > PE > PS, and the amount of adsorbed metals decreased as Cu > Pb > Cd. The amount of adsorbed metals generally decreased with the increase of particle size of MPs. With the increase of water pH and K<sup>+</sup> strength, the adsorption of metals by MPs showed an increasing and then decreasing trend; the adsorption capacity of MPs increased with the increase of fulvic acid. Under the simulated sedimentary conditions, the adsorption of different metals by MPs also tended to be Cu > Pb > Cd, which was mainly determined by metal concentrations in the sediments collected in situ. The results of this study improve our understanding of metal-MP interaction under simulated environmental conditions, shedding new light on the environmental behavior of MPs and metals in wetlands.

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