Photocatalytic hybrid system in degradation of herbicide (metsulfuron-methyl)

Nathaporn, A; Shon, HK; Vigneswaran, S; Ngo, HH

Photocatalytic hybrid system in degradation of herbicide (metsulfuron-methyl)

Nathaporn, A Shon, HK

Vigneswaran, S

Ngo, HH

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Publication Type:: Journal Article
Citation:: Water Science and Technology: Water Supply, 2006, 6 (2), pp. 109 - 114
Issue Date:: 2006-07-06

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Field	Value	Language
dc.contributor.author	Nathaporn, A	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.date.issued	2006-07-06	en_US
dc.identifier.citation	Water Science and Technology: Water Supply, 2006, 6 (2), pp. 109 - 114	en_US
dc.identifier.issn	1606-9749	en_US
dc.identifier.uri	http://hdl.handle.net/10453/3922
dc.description.abstract	Photocatalytic oxidation is becoming an emerging technology in water and wastewater treatment. Photocatalysis often leads to complete degradation of organic pollutants without any need for chemicals. In this study, the removal of the herbicide metsulfuron-methyl (MM) by photocatalysis was studied. Titanium dioxide (TiO2) was used as a catalyst in a UV reactor equipped with three lamps each with 8 watts of power. The total surface of UV lamps was 537 cm2. The capacity of the photocatalytic reactor was 1.5 L The effects of parameters such as pH and TiO2 dose on the removal of MM were studied. The combined system of the photocatalytic reactor with powder activated carbon (PAC) adsorption was also investigated. The results indicate that the use of PAC reduced the TiO2 dose and led to very high removal efficiency. A very small dose of 0.05 g/L PAC reduced TiO2 requirement from 2 g/L to less than 0.5 g/L. A detailed molecular size distribution measurement made using high performance size exclusion chromatography (HPSEC) showed that TiO2 can degrade the MM to a small molecular weight compound of 50 daltons within a detention time of 40 minutes. This hybrid system was found to be technically and economically more efficient than the other processes used to remove herbicides and pesticides. © IWA Publishing 2006.	en_US
dc.relation.ispartof	Water Science and Technology: Water Supply	en_US
dc.relation.isbasedon	10.2166/ws.2006.057	en_US
dc.subject.classification	Environmental Engineering	en_US
dc.title	Photocatalytic hybrid system in degradation of herbicide (metsulfuron-methyl)	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	6	en_US
utslib.for	0907 Environmental Engineering	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
dc.location.activity	Singapore, SINGAPORE	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.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	6	en_US

Abstract:

Photocatalytic oxidation is becoming an emerging technology in water and wastewater treatment. Photocatalysis often leads to complete degradation of organic pollutants without any need for chemicals. In this study, the removal of the herbicide metsulfuron-methyl (MM) by photocatalysis was studied. Titanium dioxide (TiO2) was used as a catalyst in a UV reactor equipped with three lamps each with 8 watts of power. The total surface of UV lamps was 537 cm2. The capacity of the photocatalytic reactor was 1.5 L The effects of parameters such as pH and TiO2 dose on the removal of MM were studied. The combined system of the photocatalytic reactor with powder activated carbon (PAC) adsorption was also investigated. The results indicate that the use of PAC reduced the TiO2 dose and led to very high removal efficiency. A very small dose of 0.05 g/L PAC reduced TiO2 requirement from 2 g/L to less than 0.5 g/L. A detailed molecular size distribution measurement made using high performance size exclusion chromatography (HPSEC) showed that TiO2 can degrade the MM to a small molecular weight compound of 50 daltons within a detention time of 40 minutes. This hybrid system was found to be technically and economically more efficient than the other processes used to remove herbicides and pesticides. © IWA Publishing 2006.

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http://hdl.handle.net/10453/3922