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Interaction and bacterial effects of microplastics pollution on heavy metals in hyporheic sediments of different land-use types in the Beiluo River Basin

Environmental Pollution 2024 8 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 55 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Bingjie Li, Bingjie Li, Bingjie Li, Yuting Zhang Bingjie Li, Zeyu Chen, Yuting Zhang Ruichen Mao, Bingjie Li, Jinxi Song, Ruichen Mao, Jinxi Song, Zeyu Chen, Jinxi Song, Yuting Zhang Bingjie Li, Yuting Zhang Yuting Zhang Jinxi Song, Zeyu Chen, Zeyu Chen, Jinxi Song, Yuting Zhang Yuting Zhang Bingjie Li, Jinxi Song, Jinxi Song, Yuting Zhang Zeyu Chen, Jiayuan Feng, Ruichen Mao, Bin Tang, Jiayuan Feng, Ruichen Mao, Jinxi Song, Bin Tang, Bin Tang, Jinxi Song, Jinxi Song, Yongqing Long, Ruichen Mao, Yongqing Long, Ruichen Mao, Yongqing Long, Yongqing Long, Jiayuan Feng, Myint Myint Nyein, Jinxi Song, Ruichen Mao, Ruichen Mao, Ruichen Mao, Bin Tang, Bin Tang, Bin Tang, Ruichen Mao, Jiayuan Feng, Myint Myint Nyein, Jiayuan Feng, Jiayuan Feng, Jiayuan Feng, Jiayuan Feng, Myint Myint Nyein, Myint Myint Nyein, Yuting Zhang

Summary

Researchers studied how microplastics and heavy metals interact in river sediments across different land-use types in a Chinese river basin. They found that microplastics concentrated more heavily in shallow sediments and that the metals detected on microplastic surfaces were present at much higher levels than in surrounding sediment. The study suggests that microplastics may serve as concentrators and carriers of heavy metal contamination, potentially amplifying pollution risks.

Polymers

PLA PS PVC

Study Type Environmental

Microplastics (MPs) pollution is ubiquitous, causing serious ecological damage by threatening the growth and health of living organisms. This study investigated the vertical and horizontal distribution of MPs, MPs-heavy metals (MPs-HMs) accumulation, contamination assessment and microbial biodiversity in hyporheic sediments of different land-use types. MPs abundance in shallow sediments (0-30 cm) was significantly higher than that in deep sediments (30-60 cm), with fewer large MPs in the deep sediments. Blue, fiber, and <500 μm were the dominant MPs types, and polystyrene, polylactic acid, and polyvinyl chloride were the dominant polymers in the Beiluo River Basin. The average concentrations of HMs detected in MPs were all much higher than the same metals in the sediments. The pollution loading index of MPs was higher in areas with a greater proportion of anthropogenic land use, and MP-HM were present to varying degrees in the vertical distribution (P > 1). Critically, bacterial diversity of anthropogenic land use was smaller than that of natural land use. High MP-HM concentrations reduced the abundance of cyanobacteria, nitrospirota, acidobacteriota, and planctomycetota, whereas desulfobacterota, chloroflexi, myxococcota, actinobacteriota, and proteobacteria have developed tolerance to MP-HM. Overall, our findings contribute to the understanding of the relationship between different land-use types and the spatial distribution of MPs and MP-HM, which is critical to manage and mitigate the hyporheic zone pollution.

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