Role of wetland organic matters as photosensitizer for degradation of micropollutants and metabolites

Lee, E; Shon, HK; Cho, J

Role of wetland organic matters as photosensitizer for degradation of micropollutants and metabolites

Lee, E Shon, HK

Cho, J

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Publication Type:: Journal Article
Citation:: Journal of Hazardous Materials, 2014, 276 pp. 1 - 9
Issue Date:: 2014-07-15

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Field	Value	Language
dc.contributor.author	Lee, E	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Cho, J	en_US
dc.date.available	2014-05-02	en_US
dc.date.issued	2014-07-15	en_US
dc.identifier.citation	Journal of Hazardous Materials, 2014, 276 pp. 1 - 9	en_US
dc.identifier.issn	0304-3894	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117653
dc.description.abstract	Overall photodegradation of pharmaceuticals, personal care products (PPCPs) and pharmaceutical metabolites were investigated in order to evaluate their photochemical fate in aquatic environments in various natural organic matter (NOM) enriched solutions. Tested PPCPs exhibited different rates of loss during direct and indirect photolysis. Here, only ultraviolet (UV) light source was used for direct photolysis and UV together with 3DOMfor indirect photolysis. Diclofenac and sulfamethoxazole were susceptible to photodegradation, whereas carbamazepine, caffeine, paraxanthine and tri(2-chloroethyl) phosphate (TCEP) showed low levels of photodegradation rate, reflecting their conservative photoreactivity. During indirect photodegradation, in contrast to the hydrophilic autochthonous NOM, allochthonous NOM with relatively high molecular weight (MW), specific ultraviolet absorbance (SUVA) and hydrophobicity (e.g., Suwannee River humic acid (SRHA)) revealed to significantly inhibit the photolysis of target micropollutants. The presence of Typha wetland NOM enhanced the indirect photolysis of well-known conservative micopollutants (carbamazepine and paraxanthine). And atenolol, carbamazepine, glimepiride, and N-acetyl-sulfamethoxazole were found to be sensitive to the triplet excited state of dissolved organic matter (3DOM) with Typha wetland NOM under deoxygenated condition. This suggests that photolysis in constructed wetlands connected to the wastewater treatment plant can enhance the degradation of some anthropogenic micropollutants by the interaction with 3DOM* in wetlands. © 2014 Elsevier B.V.	en_US
dc.relation.ispartof	Journal of Hazardous Materials	en_US
dc.relation.isbasedon	10.1016/j.jhazmat.2014.05.001	en_US
dc.subject.classification	Strategic, Defence & Security Studies	en_US
dc.subject.mesh	Humic Substances	en_US
dc.subject.mesh	Photosensitizing Agents	en_US
dc.subject.mesh	Environmental Pollutants	en_US
dc.subject.mesh	Wetlands	en_US
dc.title	Role of wetland organic matters as photosensitizer for degradation of micropollutants and metabolites	en_US
dc.type	Journal Article
utslib.citation.volume	276	en_US
utslib.for	090703 Environmental Technologies	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	05 Environmental Sciences	en_US
utslib.for	09 Engineering	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/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	276	en_US

Abstract:

Overall photodegradation of pharmaceuticals, personal care products (PPCPs) and pharmaceutical metabolites were investigated in order to evaluate their photochemical fate in aquatic environments in various natural organic matter (NOM) enriched solutions. Tested PPCPs exhibited different rates of loss during direct and indirect photolysis. Here, only ultraviolet (UV) light source was used for direct photolysis and UV together with 3DOM*for indirect photolysis. Diclofenac and sulfamethoxazole were susceptible to photodegradation, whereas carbamazepine, caffeine, paraxanthine and tri(2-chloroethyl) phosphate (TCEP) showed low levels of photodegradation rate, reflecting their conservative photoreactivity. During indirect photodegradation, in contrast to the hydrophilic autochthonous NOM, allochthonous NOM with relatively high molecular weight (MW), specific ultraviolet absorbance (SUVA) and hydrophobicity (e.g., Suwannee River humic acid (SRHA)) revealed to significantly inhibit the photolysis of target micropollutants. The presence of Typha wetland NOM enhanced the indirect photolysis of well-known conservative micopollutants (carbamazepine and paraxanthine). And atenolol, carbamazepine, glimepiride, and N-acetyl-sulfamethoxazole were found to be sensitive to the triplet excited state of dissolved organic matter (3DOM*) with Typha wetland NOM under deoxygenated condition. This suggests that photolysis in constructed wetlands connected to the wastewater treatment plant can enhance the degradation of some anthropogenic micropollutants by the interaction with 3DOM* in wetlands. © 2014 Elsevier B.V.

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