Photodegradation of estrogenic endocrine disrupting steroidal hormones in aqueous systems: Progress and future challenges

Sornalingam, K; McDonagh, A; Zhou, JL

Photodegradation of estrogenic endocrine disrupting steroidal hormones in aqueous systems: Progress and future challenges

Sornalingam, K McDonagh, A

Zhou, JL

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Publication Type:: Journal Article
Citation:: Science of the Total Environment, 2016, 550 pp. 209 - 224
Issue Date:: 2016-04-15

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Field	Value	Language
dc.contributor.author	Sornalingam, K	en_US
dc.contributor.author	McDonagh, A https://orcid.org/0000-0002-9502-1175	en_US
dc.contributor.author	Zhou, JL https://orcid.org/0000-0003-1393-1608	en_US
dc.date.available	2016-01-15	en_US
dc.date.issued	2016-04-15	en_US
dc.identifier.citation	Science of the Total Environment, 2016, 550 pp. 209 - 224	en_US
dc.identifier.issn	0048-9697	en_US
dc.identifier.uri	http://hdl.handle.net/10453/41646
dc.description.abstract	© 2016 Elsevier B.V. This article reviews different photodegradation technologies used for the removal of four endocrine disrupting chemicals (EDCs): estrone (E1), 17β-estradiol (E2), estriol (E3) and 17α-ethinylestradiol (EE2). The degradation efficiency is greater under UV than visible light; and increases with light intensity up to when mass transfer becomes the rate limiting step. Substantial rates are observed in the environmentally relevant range of pH7-8, though higher rates are obtained for pH above the pKa (~10.4) of the EDCs. The effects of dissolved organic matter (DOM) on EDC photodegradation are complex with both positive and negative impacts being reported. TiO2 remains the best catalyst due to its superior activity, chemical and photo stability, cheap commercial availability, capacity to function at ambient conditions and low toxicity. The optimum TiO2 loading is 0.05-1gl-1, while higher loadings have negative impact on EDC removal. The suspended catalysts prove to be more efficient in photocatalysis compared to the immobilised catalysts, while the latter are considered more suitable for commercial scale applications. Photodegradation mostly follows 1st or pseudo 1st order kinetics. Photodegradation typically eradicates or moderates estrogenic activity, though some intermediates are found to exhibit higher estrogenicity than the parent EDCs; the persistence of estrogenic activity is mainly attributed to the presence of the phenolic moiety in intermediates.	en_US
dc.relation.ispartof	Science of the Total Environment	en_US
dc.relation.isbasedon	10.1016/j.scitotenv.2016.01.086	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Estriol	en_US
dc.subject.mesh	Estrone	en_US
dc.subject.mesh	Ethinyl Estradiol	en_US
dc.subject.mesh	Estrogens	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Kinetics	en_US
dc.subject.mesh	Photolysis	en_US
dc.subject.mesh	Endocrine Disruptors	en_US
dc.title	Photodegradation of estrogenic endocrine disrupting steroidal hormones in aqueous systems: Progress and future challenges	en_US
dc.type	Journal Article
utslib.citation.volume	550	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0907 Environmental Engineering	en_US
utslib.for	0399 Other Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
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/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	550	en_US

Abstract:

© 2016 Elsevier B.V. This article reviews different photodegradation technologies used for the removal of four endocrine disrupting chemicals (EDCs): estrone (E1), 17β-estradiol (E2), estriol (E3) and 17α-ethinylestradiol (EE2). The degradation efficiency is greater under UV than visible light; and increases with light intensity up to when mass transfer becomes the rate limiting step. Substantial rates are observed in the environmentally relevant range of pH7-8, though higher rates are obtained for pH above the pKa (~10.4) of the EDCs. The effects of dissolved organic matter (DOM) on EDC photodegradation are complex with both positive and negative impacts being reported. TiO2 remains the best catalyst due to its superior activity, chemical and photo stability, cheap commercial availability, capacity to function at ambient conditions and low toxicity. The optimum TiO2 loading is 0.05-1gl-1, while higher loadings have negative impact on EDC removal. The suspended catalysts prove to be more efficient in photocatalysis compared to the immobilised catalysts, while the latter are considered more suitable for commercial scale applications. Photodegradation mostly follows 1st or pseudo 1st order kinetics. Photodegradation typically eradicates or moderates estrogenic activity, though some intermediates are found to exhibit higher estrogenicity than the parent EDCs; the persistence of estrogenic activity is mainly attributed to the presence of the phenolic moiety in intermediates.

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http://hdl.handle.net/10453/41646