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Critical effect of iron red pigment on photoaging behavior of polypropylene microplastics in artificial seawater

Journal of Hazardous Materials 2020 47 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.

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

Summary

This study found that iron red pigment additives in polypropylene microplastics significantly accelerated their photoaging in artificial seawater, causing surface cracking and rapid iron release. Plastic additives can dramatically alter how microplastics degrade in the environment, affecting both their physical fragmentation into nanoplastics and their chemical toxicity.

Polymers

Study Type Environmental

Microplastics (MPs) containing chemical additives undergo extensive aging in the environment, but the effect of additives on aging behavior of MPs is not fully understood. This study evaluated the effects of iron red pigment on the photoaging behavior of polypropylene (PP) MPs and the release kinetics of Fe(II) and Fe(III) under simulated sunlight. Based on analyses in surface property and aging products of leachate, the incorporated iron red pigment significantly decreased the photoaging rate of PP MPs. The critical effect mainly depended on the light shielding and the competition of pigment for electrons and reactive oxygen species generated from irradiated MPs. Light irradiation also caused the production of homologous series of organic products containing dicarboxylic acid end groups. Moreover, aging of pigmented MPs enhanced the release of Fe ions in leachates, and the types of released iron ions were different between dark and light conditions, where the iron ion in dark system was mainly as Fe(III), while Fe(II) was the dominant form in light irradiation, since the released Fe(III) reacted with MP-derived organic acids and reactive oxygen species in light condition. The findings highlight the critical role of inorganic pigments in the environmental fate and risk of MPs.

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