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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Marine & Wildlife Remediation Sign in to save

Molecular Weights of Dissolved Organic Matter Significantly Affect Photoaging of Microplastics

Environmental Science & Technology 2024 41 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 60 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Xuetao Guo, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xinran Qiu, Jianrui Pan, Jianrui Pan, Ling Ding Ling Ding, Ling Ding, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xinran Qiu, Ling Ding Xinran Qiu, Xinran Qiu, Jianrui Pan, Jianrui Pan, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Shilong Zhang, Ling Ding, Xuetao Guo, Ling Ding Ling Ding Xuetao Guo, Ling Ding, Ling Ding Shilong Zhang, Xuetao Guo, Xuetao Guo, Ling Ding, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Jianrui Pan, Jianrui Pan, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Jianrui Pan, Jianrui Pan, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Ling Ding Ling Ding Ling Ding Ling Ding Ling Ding Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xujun Liang, Jianrui Pan, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Ling Ding, Ling Ding, Ling Ding, Ling Ding, Ling Ding, Ling Ding, Jianrui Pan, Ling Ding Xinran Qiu, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xujun Liang, Xujun Liang, Ling Ding, Xuetao Guo, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xujun Liang, Xujun Liang, Xinran Qiu, Ling Ding Xujun Liang, Ling Ding Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xujun Liang, Xujun Liang, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xujun Liang, Xinran Qiu, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Ling Ding Ling Ding Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xuetao Guo, Xuetao Guo, Ling Ding, Xujun Liang, Xuetao Guo, Xuetao Guo, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xuetao Guo, Xinran Qiu, Xujun Liang, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xuetao Guo, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Ling Ding

Summary

This study found that dissolved organic matter in natural water significantly speeds up how quickly microplastics break down under sunlight, with smaller organic molecules having the strongest effect. The breakdown process generates reactive chemical species that attack the plastic surfaces. This is important because it means microplastics in natural waters may fragment into smaller, potentially more harmful nanoplastics faster than lab studies using pure water would suggest.

Polymers
PS

The fate of ubiquitous microplastics (MPs) is largely influenced by dissolved organic matter (DOM) in aquatic environments, which has garnered significant attention. The reactivity of DOM is reported to be greatly regulated by molecular weights (MWs), yet little is known about the effects of different MW DOM on MP aging. Here, the aging behavior of polystyrene MPs (PSMPs) in the presence of different MW fulvic acids (FAs) and humic acids (HAs) was systematically investigated. Under ultraviolet (UV) illumination, O/C of PSMPs aged for 96 h surged from 0.008 to 0.146 in the lower MW FA (FA<sub><1kDa</sub>) treatment, suggesting significant PSMP aging. However, FA exhibited a stronger effect on facilitating PSMP photoaging than HA, which can be attributed to the fact that FA<sub><1kDa</sub> contains more quinone and phenolic moieties, demonstrating a higher redox capacity. Meanwhile, compared to other fractions, FA<sub><1kDa</sub> was more actively involved in the increase of different reactive species yields by 50-290%, including •OH, which plays a key role in PSMP photoaging, and contributed to a 25% increase in electron-donating capacity (EDC). This study lays a theoretical foundation for a better understanding of the environmental fate of MPs.

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