Capability of shallow open-water unit for emerging contaminants attenuation and ecological safety improvement in a treated effluent polishing process

Wang, YK; Ma, XY; Tang, L; Wang, XC; Zhang, S; Ngo, HH; Yu, M

Capability of shallow open-water unit for emerging contaminants attenuation and ecological safety improvement in a treated effluent polishing process

Wang, YK Ma, XY Tang, L Wang, XC Zhang, S Ngo, HH Yu, M

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Water Process Engineering, 2021, 40, pp. 101788-101788
Issue Date:: 2021-04-01

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Field	Value	Language
dc.contributor.author	Wang, YK
dc.contributor.author	Ma, XY
dc.contributor.author	Tang, L
dc.contributor.author	Wang, XC
dc.contributor.author	Zhang, S
dc.contributor.author	Ngo, HH
dc.contributor.author	Yu, M
dc.date.accessioned	2021-12-07T05:44:08Z
dc.date.available	2021-12-07T05:44:08Z
dc.date.issued	2021-04-01
dc.identifier.citation	Journal of Water Process Engineering, 2021, 40, pp. 101788-101788
dc.identifier.issn	2214-7144
dc.identifier.uri	http://hdl.handle.net/10453/152192
dc.description.abstract	Nature-based solutions of polishing treated effluent are drawing increased attention because of their potential to mitigate ecological risks, and the shallow open water unit (SOWU) process is one of the most promising options. In this study, a pilot experiment was conducted to assess the efficiency of SOWU for effluent quality polishing in a municipal wastewater treatment plant targeting 33 residual emerging contaminants (ECs) that were categorized into six groups, namely pharmaceuticals, sunscreens, bactericides, pesticides, flame retardants and phenols. In the 14-day monitoring period, each of the ECs decayed following a first order reaction, and about 61 % total ECs removal was achieved, indicating the remarkable photolysis effect of the SOWU under natural conditions. The significant removal of ECs, especially the very high removals of pharmaceuticals (76 %) and sunscreens (77 %), was associated with the attenuation of both the acute luminescent bacterial toxicity and genotoxicity. From the linear relationship between the acute toxicity and chromophoric dissolved organic matter and that between genotoxicity and UV absorbance at 254 nm, it was likely that the attenuation of biotoxicities resulted from the decay of chromophoric and aromatic compounds. By analyzing several reactive species, the excellent photoreactivity of the SOWU was further identified.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Journal of Water Process Engineering
dc.relation.isbasedon	10.1016/j.jwpe.2020.101788
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.title	Capability of shallow open-water unit for emerging contaminants attenuation and ecological safety improvement in a treated effluent polishing process
dc.type	Journal Article
utslib.citation.volume	40
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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	open_access	*
pubs.consider-herdc	false
utslib.copyright.embargo	2023-04-30T00:00:00+1000Z
dc.date.updated	2021-12-07T05:44:07Z
pubs.publication-status	Published
pubs.volume	40

Abstract:

Nature-based solutions of polishing treated effluent are drawing increased attention because of their potential to mitigate ecological risks, and the shallow open water unit (SOWU) process is one of the most promising options. In this study, a pilot experiment was conducted to assess the efficiency of SOWU for effluent quality polishing in a municipal wastewater treatment plant targeting 33 residual emerging contaminants (ECs) that were categorized into six groups, namely pharmaceuticals, sunscreens, bactericides, pesticides, flame retardants and phenols. In the 14-day monitoring period, each of the ECs decayed following a first order reaction, and about 61 % total ECs removal was achieved, indicating the remarkable photolysis effect of the SOWU under natural conditions. The significant removal of ECs, especially the very high removals of pharmaceuticals (76 %) and sunscreens (77 %), was associated with the attenuation of both the acute luminescent bacterial toxicity and genotoxicity. From the linear relationship between the acute toxicity and chromophoric dissolved organic matter and that between genotoxicity and UV absorbance at 254 nm, it was likely that the attenuation of biotoxicities resulted from the decay of chromophoric and aromatic compounds. By analyzing several reactive species, the excellent photoreactivity of the SOWU was further identified.

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http://hdl.handle.net/10453/152192