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Photo aging of polypropylene microplastics in estuary water and coastal seawater: Important role of chlorine ion

Water Research 2021 161 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xiaowei Wu, Yanqi Shi, Yanqi Shi, Yanqi Shi, Changfu Yang, Xiaowei Wu, Xiaowei Wu, Changfu Yang, Xiaowei Wu, Xiaowei Wu, Changfu Yang, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Hanyu Wang, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Changfu Yang, Changfu Yang, Hanyu Wang, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Peng Liu, Changfu Yang, Xiaowei Wu, Changfu Yang, Xiaowei Wu, Peng Liu, Changfu Yang, Hexinyue Huang, Hexinyue Huang, Xiaowei Wu, Hexinyue Huang, Xiaowei Wu, Peng Liu, Changfu Yang, Hexinyue Huang, Hexinyue Huang, Changfu Yang, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Hexinyue Huang, Changfu Yang, Peng Liu, Peng Liu, Yanqi Shi, Peng Liu, Peng Liu, Hexinyue Huang, Yanqi Shi, Changfu Yang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Changfu Yang, Yanqi Shi, Hanyu Wang, Hanyu Wang, Hanyu Wang, Xiaowei Wu, Peng Liu, Yanqi Shi, Xiaowei Wu, Hanyu Wang, Changfu Yang, Hanyu Wang, Hexinyue Huang, Xiaowei Wu, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Yanqi Shi, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Xiaowei Wu, Hanyu Wang, Hanyu Wang, Xiaowei Wu, Hanyu Wang, Peng Liu, Changfu Yang, Changfu Yang, Changfu Yang, Peng Liu, Peng Liu, Hanyu Wang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Xiaowei Wu, Peng Liu, Yanqi Shi, Shixiang Gao Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Hanyu Wang, Hexinyue Huang, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Xiaowei Wu, Hexinyue Huang, Hanyu Wang, Shixiang Gao Shixiang Gao Peng Liu, Peng Liu, Peng Liu, Changfu Yang, Xiaowei Wu, Yanqi Shi, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Peng Liu, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Hanyu Wang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Changfu Yang, Yanqi Shi, Yanqi Shi, Xiaowei Wu, Shixiang Gao Shixiang Gao Shixiang Gao Peng Liu, Peng Liu, Xiaowei Wu, Shixiang Gao Shixiang Gao Peng Liu, Peng Liu, Shixiang Gao Shixiang Gao Xiaowei Wu, Shixiang Gao Shixiang Gao Shixiang Gao Peng Liu, Shixiang Gao Yanqi Shi, Shixiang Gao Shixiang Gao Shixiang Gao Yanqi Shi, Shixiang Gao Yanqi Shi, Yanqi Shi, Shixiang Gao Shixiang Gao Shixiang Gao Shixiang Gao

Summary

Researchers studied how UV light ages polypropylene microplastics in estuarine and coastal seawater and found that chloride ions significantly accelerated photo-degradation by generating reactive chlorine radicals, suggesting that marine microplastics age faster than freshwater ones.

Polymers

Study Type Environmental

Photo aging of microplastics (MPs) in water environment are relevant to free radical associated polymer chain reaction, and various photo chemical reactive constitutes (i.e., Cl, Br, NO, CO, and natural organic matters) would affect the reaction, leading to a great difference in the photo aging mechanism of MPs between freshwater and seawater system. This study investigated light induced photo aging process of polypropylene (PP) MPs in ultrapure water, estuary water, and seawater. Results revealed that the aging rate of PP MPs was significantly decreased in estuary water and seawater compared with that in ultrapure water, leading to a longer resistance time after emission in marine environment. Besides, lower carbonyl index was found with the increased aqueous Cl concentration, highlighting the important role of Cl in the inhibitory effect for PP MPs aging process in seawater. This is due to the formation of Cl in seawater which could react with HO• and prevent the formation of O, thus inhibit the photo aging process of PP MPs under light irradiation. The finding in this study clearly indicates the impact of the water matrices on the photo aging rate of MPs in natural water.

Read via DOI PubMed

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