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Increased Cu(II) Adsorption Onto UV-Aged Polyethylene, Polypropylene, and Polyethylene Terephthalate Microplastic Particles in Seawater

Frontiers in Marine Science 2021 35 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xue Yu, Xue Yu, Xiaoxin Han, Xiaoxin Han, Xiaoxin Han, Xiaoxin Han, Xiaoxin Han, Xiaoxin Han, Xueqiang Lu Xueqiang Lu Rolf D. Vogt, Jianfeng Feng, Jiaying Zhou, Xueqiang Lu Rolf D. Vogt, Xue Yu, Boyang Zheng, Boyang Zheng, Xueqiang Lu Boyang Zheng, Rolf D. Vogt, Xue Yu, Rolf D. Vogt, Rolf D. Vogt, Xueqiang Lu Xue Yu, Xiaoxin Han, Xueqiang Lu Xueqiang Lu Xiaoxin Han, Xueqiang Lu Xueqiang Lu Xiaoxin Han, Xueqiang Lu Xueqiang Lu Xueqiang Lu Jianfeng Feng, Rolf D. Vogt, Xiaoxin Han, Xueqiang Lu Jianfeng Feng, Jianfeng Feng, Jianfeng Feng, Jianfeng Feng, Xueqiang Lu Xueqiang Lu Xue Yu, Boyang Zheng, Boyang Zheng, Xueqiang Lu Xueqiang Lu Xueqiang Lu Jianfeng Feng, Xueqiang Lu Xueqiang Lu Xueqiang Lu Xueqiang Lu Xueqiang Lu Xueqiang Lu Xueqiang Lu Xueqiang Lu

Summary

Researchers found that UV aging significantly increased copper(II) adsorption onto polyethylene, polypropylene, and polyethylene terephthalate microplastics in seawater by up to 2.92 times after 12 months, with oxidation-induced surface changes and smaller particle sizes amplifying this effect for PP and PET.

Polymers

PE PET PP

Study Type Environmental

Environmental effects of microplastic are rather due to their adsorption capacity of contaminants than themselves. Aging is a key factor influencing adsorption properties of environmental microplastics. In order to clarify this influence, polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET) microplastics with particle sizes of &lt;0.9 mm, 0.9–2 mm, and 2–5 mm were artificially aged in seawater for 12 months. This enabled an assessment of the change in Cu(II) adsorption capacity to the microplastics particles under aging. According to the FTIR spectra, fresh microplastics were oxidized during the UV induced aging process. The adsorption capacities of microplastic were positively correlated with their aging time. After 12-months aging, the amount of Cu(II) adsorbed to the aged microplastics was 1.45–2.92 times higher than on the fresh microplastic particles. For PP and PET, the aging effect increased with decreasing size of the microplastic particles. In the case of PE, particles with the medium particle size (0.9–2 mm) had the strongest aging effect.

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