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Different sizes of polystyrene microplastics induced distinct microbial responses of anaerobic granular sludge

Water Research 2022 73 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.

Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Yuting Zhang, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Chen Wang, Chen Wang, Chen Wang, Wei Wei, Chen Wang, Wei Wei, Wei Wei, Yuting Zhang, Bing‐Jie Ni Xiaohu Dai, Xiaohu Dai, Xiaohu Dai, Wei Wei, Yuting Zhang, Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Xiaohu Dai, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Chen Wang, Chen Wang, Yuting Zhang, Yuting Zhang, Yuting Zhang, Yuting Zhang, Wei Wei, Wei Wei, Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Yuting Zhang, Wei Wei, Bing‐Jie Ni Wei Wei, Chen Wang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Xiaohu Dai, Xiaohu Dai, Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Bing‐Jie Ni Xiaohu Dai, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Xiaohu Dai, Bing‐Jie Ni Xiaohu Dai, Xiaohu Dai, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Xiaohu Dai, Bing‐Jie Ni Xiaohu Dai, Xiaohu Dai, Xiaohu Dai, Wei Wei, Bing‐Jie Ni Xiaohu Dai, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xiaohu Dai, Yuting Zhang, Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni

Summary

Researchers exposed anaerobic granular sludge used in wastewater treatment to polystyrene microplastics of different sizes, ranging from 0.5 to 150 micrometers. They found that larger particles caused progressively greater inhibition of methane production, with distinct microbial community shifts depending on particle size. The study reveals that microplastic size is an important factor in determining the severity of disruption to anaerobic wastewater treatment processes.

Polymers

Study Type Environmental

Recent investigations confirmed the inhibitory effect of microplastics with single sizes on the anaerobic granular sludge (AGS) wastewater treatment system. However, the differences of toxicity from different sizes of microplastics toward AGS and their underlying mechanism are still unclear. In this work, the responds of AGS exposed to different particle sizes of polystyrene microplastics (PS-MPs) were reported. The results showed that the increasing particle sizes (from 0.5 μm to 150 μm) of PS-MPs induced a gradually increasing and distinct inhibitory (from 6.7% to 16.2%) effect on the cumulative methane production by AGS, accompanied by the similar decreasing organic carbon degradation trends. Correspondingly, the integrity and the cell viability of the AGS granules were damaged and the populations of the key acidogens and methanogens were reduced when exposed to PS-MPs, which was particularly evident in the reactors affected by the larger micron-sized PS-MPs. The zeta potential and contact angle indicated that the larger-sized PS-MPs had the stronger dispersive properties and affinity for AGS, causing the higher oxidative stress and leachates toxicity. Further investigation revealed that the tolerance of AGS to PS-MPs toxicity also exhibited size-dependent trend. Larger particles (e.g., 150 μm) of PS-MPs inhibited extracellular polymeric substance (EPS) secretion, while smaller particles (e.g., 0.5 μm) promoted EPS generation with the release of more humic acid, alleviating their toxicity.

Read via DOI PubMed

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