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

Wang, C; Wei, W; Zhang, Y-T; Dai, X; Ni, B-J

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

Wang, C Wei, W

Zhang, Y-T Dai, X Ni, B-J

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Water Res, 2022, 220, pp. 118607
Issue Date:: 2022-07-15

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Field	Value	Language
dc.contributor.author	Wang, C
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Zhang, Y-T
dc.contributor.author	Dai, X
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-22T01:11:01Z
dc.date.available	2022-05-12
dc.date.available	2023-03-22T01:11:01Z
dc.date.issued	2022-07-15
dc.identifier.citation	Water Res, 2022, 220, pp. 118607
dc.identifier.issn	0043-1354
dc.identifier.issn	1879-2448
dc.identifier.uri	http://hdl.handle.net/10453/168032
dc.description.abstract	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.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation	http://purl.org/au-research/grants/arc/DP220101139
dc.relation	http://purl.org/au-research/grants/arc/DE220100530
dc.relation.ispartof	Water Res
dc.relation.isbasedon	10.1016/j.watres.2022.118607
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Microplastics
dc.subject.mesh	Plastics
dc.subject.mesh	Polystyrenes
dc.subject.mesh	Sewage
dc.subject.mesh	Polystyrenes
dc.subject.mesh	Plastics
dc.subject.mesh	Sewage
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Microplastics
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Microplastics
dc.subject.mesh	Plastics
dc.subject.mesh	Polystyrenes
dc.subject.mesh	Sewage
dc.title	Different sizes of polystyrene microplastics induced distinct microbial responses of anaerobic granular sludge.
dc.type	Journal Article
utslib.citation.volume	220
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-22T01:10:58Z
pubs.publication-status	Published
pubs.volume	220

Abstract:

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.

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http://hdl.handle.net/10453/168032