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Molecular Insights into the Synergistic Inhibition of Microplastics-Derived Dissolved Organic Matter and Anions on the Transformation of Ferrihydrite

Environmental Science & Technology 2025 14 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 58 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Ling Ding, Ling Ding Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Ling Ding, Xuetao Guo, Ling Ding, Ling Ding Ling Ding Xuetao Guo, Xuetao Guo, Ling Ding, Ling Ding, Bing Han, Xuetao Guo, Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Rongrong Jia, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Ling Ding, Ling Ding, Ling Ding, Ling Ding, Ling Ding, Ling Ding, Xujun Liang, Yang Xiao, Xuetao Guo, Ling Ding Ling Ding Xuetao Guo, Ling Ding Ling Ding Xujun Liang, Ling Ding Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Xujun Liang, Xuetao Guo, Xujun Liang, Xuetao Guo, Ling Ding Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Ling Ding Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Xujun Liang, Ling Ding, Xuetao Guo, Ling Ding Xuetao Guo, Ling Ding, 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, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Ling Ding, 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, Xujun Liang, Xuetao Guo, Xujun Liang, Xujun Liang, Xujun Liang, Xujun Liang, Xuetao Guo, Bing Han, Xuetao Guo, Bing Han, Xuetao Guo, Xujun Liang, Xujun Liang, 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, Xujun Liang, Xuetao Guo, Xuetao Guo, Bing Han, Xuetao Guo, Xuetao Guo, Xujun Liang, 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, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xuetao Guo, Xujun Liang, Xujun Liang, Xuetao Guo, Xuetao Guo, Ling Ding

Summary

Researchers investigated how dissolved organic matter released from microplastics combines with naturally occurring ions to affect iron mineral transformations in the environment. They found that microplastic-derived organic matter and ions like phosphate work together to strongly inhibit the conversion of a reactive iron mineral called ferrihydrite. The findings matter because these iron minerals play key roles in nutrient cycling and pollutant fate in soils and waterways.

Polymers
PS

Ferrihydrite (Fh), as a ubiquitous iron (oxyhydr)oxide, plays an essential role in nutrient cycling and pollutant transformation due to its high surface area and diversified reaction sites. In the natural environment, Fh transformation could be easily influenced by coexisting components (particularly dissolved organic matter (DOM) and anions). As a new and important carbon source, microplastic-derived DOM (MP-DOM) directly or indirectly affects the morphology and fate of Fh, but limited knowledge exists about the combined effect of MP-DOM and anions on Fh transformation. Herein, this study elucidates the joint effects of polystyrene DOM (PS-DOM) and anions (such as Cl<sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, and PO<sub>4</sub><sup>3-</sup>) on Fh transformation. Single anions (especially PO<sub>4</sub><sup>3-</sup>) were shown to inhibit the transformation of Fh to hematite (Hm) by hindering the dissolution and recrystallization of Fe(III). However, the inhibitory effect was strongly enhanced when PS-DOM and anions coexisted, which is attributed to their synergetic effects on inhibiting dissolution/recrystallization by occupying more active sites and hindering electron transfer. Furthermore, Fh transformation was predominantly controlled by PS-DOM, especially those containing high-unsaturation, high-oxidation-state, and O-rich phenolic compounds. These findings provide a new perspective on the significance of considering the joint effects of DOM and anions in evaluating the transformation of iron minerals.

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