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Molecular transformation and photochemical reactivity of microplastic-derived dissolved organic matter on goethite: Implications for persistence and reactive oxygen species dynamics

Water Research 2025 7 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 53 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xinran Qiu, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xinran Qiu, Ling Ding Daofen Huang, Daofen Huang, Daofen Huang, Ling Ding, Ling Ding, Xinran Qiu, Xinran Qiu, Xinran Qiu, Daofen Huang, Daofen Huang, Ling Ding Daofen Huang, Xinran Qiu, Xinran Qiu, Daofen Huang, Daofen Huang, Xinran Qiu, Xinran Qiu, Daofen Huang, Xuetao Guo, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xuetao Guo, Daofen Huang, Xinran Qiu, Xinran Qiu, Daofen Huang, Xuetao Guo, Ling Ding Ling Ding Xuetao Guo, Ling Ding Xuetao Guo, Daofen Huang, Daofen Huang, Xuetao Guo, Daofen Huang, Xuetao Guo, Ling Ding, Ling Ding, Ling Ding, Daofen Huang, Bin Zhang, Haoran Dong, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xinran Qiu, Xuetao Guo, Bin Zhang, Xinran Qiu, Xinran Qiu, Daofen Huang, Xinran Qiu, Ling Ding Xuetao Guo, Xuetao Guo, Xinran Qiu, Haoran Dong, Xinran Qiu, Xuetao Guo, Xinran Qiu, Xuetao Guo, Ling Ding Xujun Liang, Ling Ding, Xinran Qiu, Ling Ding Xuetao Guo, Daofen Huang, Ling Ding Ling Ding Xuetao Guo, Xuetao Guo, Bin Zhang, Ling Ding, Xuetao Guo, Bin Zhang, Xinran Qiu, Ling Ding, Xuetao Guo, Ling Ding, Ling Ding, Xinran Qiu, Daofen Huang, Xinran Qiu, Xuetao Guo, Daofen Huang, Xinran Qiu, Xinran Qiu, Daofen Huang, Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Xinran Qiu, Xinran Qiu, Xinran Qiu, Ling Ding, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xinran Qiu, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Bin Zhang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Ling Ding, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xinran Qiu, Xuetao Guo, Xuetao Guo, Ling Ding Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Xinran Qiu, Ling Ding Xinran Qiu, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xuetao Guo, Xuetao Guo, Ling Ding Ling Ding Ling Ding Ling Ding 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, 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, Xinran Qiu, Xujun Liang, Xujun Liang, Bin Zhang, Bin Zhang, Bin Zhang, Xinran Qiu, Xujun Liang, Ling Ding, Ling Ding, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Haoran Dong, Haoran Dong, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xinran Qiu, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xuetao Guo, Xujun Liang, Xujun Liang, Xuetao Guo, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Bin Zhang, 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, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding

Summary

Researchers investigated how microplastic-derived dissolved organic matter interacts with the mineral goethite and how this affects its photochemical reactivity. They found that different plastic types produced distinct chemical behaviors: polystyrene-derived matter underwent sulfonation that enhanced reactive oxygen species formation, while polyethylene-derived matter remained relatively inert. The study suggests that microplastic-derived organic matter persists differently in soil depending on its polymer origin and mineral interactions.

Polymers

PE PS

Microplastics (MPs)-derived dissolved organic matter (MPs-DOM) is emerging as a significant contributor to environmental DOM pools. However, the molecular-scale processes governing its interactions with mineral and their effects on photoreactivity remain poorly understood. This study elucidates the structure-dependent molecular transformations and photochemical reactivity of DOM during its interaction with goethite, revealing distinct mechanisms driving reactive oxygen species (ROS) dynamics. Hydroxyl radical (•OH) production universally declined as goethite adsorbed electron-donating groups. Singlet oxygen (O) remained stable due to the presence of persistent aromatic photosensitizers. Triplet-excited DOM (DOM*) exhibited divergent trends: humic acid (HA) and polybutylene adipate terephthalate (PBAT)-DOM showed decreases due to aromatic core adsorption, while fulvic acid (FA) and polystyrene (PS)-DOM exhibited increases driven by humification-stabilized quinoid systems and sulfonation-enhanced conjugation, respectively. The aliphatic inertia of polyethylene (PE)-DOM minimized ROS fluctuations. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) indicated that HA retained lignin-like components and stable sulfur/nitrogen heterocycles, while FA preserved branched quinones. PS-DOM underwent sulfonation, generating benzene sulfonates that enhanced O formation, whereas PBAT-DOM hydrolyzed to nitrogenous metabolites that suppressed •OH production. PE-DOM remained structurally resistant, consistent with its hydrophobic aliphatic chains. These findings emphasize that goethite's selective adsorption enriches redox-active aromatics in natural DOM but promotes the persistence of MPs-DOM through sulfurization and nitrogenization.

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