Solar photolysis versus TiO2-mediated solar photocatalysis: a kinetic study of the degradation of naproxen and diclofenac in various water matrices
Given that drugs and their degradation products are likely to occur as concoctions in wastewater, the degradation of a mixture of two nonsteroidal anti-inflammatory drugs (NSAIDs), diclofenac (DCF) and naproxen (NPX), was investigated by solar photolysis and titanium dioxide (TiO2)-mediated sol...
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Springer Verlag
2016
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| Online Access: | http://ir.unimas.my/12536/ http://ir.unimas.my/12536/ http://ir.unimas.my/12536/ http://ir.unimas.my/12536/1/Solar-photolysis-versus%209abstract%29.pdf |
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unimas-125362016-06-28T03:05:08Z http://ir.unimas.my/12536/ Solar photolysis versus TiO2-mediated solar photocatalysis: a kinetic study of the degradation of naproxen and diclofenac in various water matrices Kanakaraju, Devagi Motti, Cherie A. Glass, Beverley D. Oelgemöller, Michael GE Environmental Sciences Given that drugs and their degradation products are likely to occur as concoctions in wastewater, the degradation of a mixture of two nonsteroidal anti-inflammatory drugs (NSAIDs), diclofenac (DCF) and naproxen (NPX), was investigated by solar photolysis and titanium dioxide (TiO2)-mediated solar photocatalysis using an immersion-well photoreactor. An equimolar ratio (1:1) of both NSAIDs in distilled water, drinking water, and river water was subjected to solar degradation. Solar photolysis of the DCF and NPX mixture was competitive particularly in drinking water and river water, as both drugs have the ability to undergo photolysis. However, the addition of TiO2 in the mixture significantly enhanced the degradation rate of both APIs compared to solar photolysis alone. Mineralization, as measured by chemical oxygen demand (COD), was incomplete under all conditions investigated. TiO2-mediated solar photocatalytic degradation of DCF and NPX mixtures produced 15 identifiable degradants corresponding to degradation of the individual NSAIDs, while two degradation products with much higher molecular weight than the parent NSAIDs were identified by liquid chromatography mass spectrometry (LC-MS) and Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS). This study showed that the solar light intensity and the water matrix appear to be the main factors influencing the overall performance of the solar photolysis and TiO2-mediated solar photocatalysis for degradation of DCF and NPX mixtures. Springer Verlag 2016 Article PeerReviewed text en http://ir.unimas.my/12536/1/Solar-photolysis-versus%209abstract%29.pdf Kanakaraju, Devagi and Motti, Cherie A. and Glass, Beverley D. and Oelgemöller, Michael (2016) Solar photolysis versus TiO2-mediated solar photocatalysis: a kinetic study of the degradation of naproxen and diclofenac in various water matrices. Environmental Science and Pollution Research, 2016. pp. 1-12. ISSN 09441344 https://www.scopus.com/record/display.uri?eid=2-s2.0-84971596982&origin=inward&txGid=0 DOI: 10.1007/s11356-016-6906-8 |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Malaysia Sarawak |
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UNIMAS Institutional Repository |
| collection |
Online Access |
| language |
English |
| topic |
GE Environmental Sciences |
| spellingShingle |
GE Environmental Sciences Kanakaraju, Devagi Motti, Cherie A. Glass, Beverley D. Oelgemöller, Michael Solar photolysis versus TiO2-mediated solar photocatalysis: a kinetic study of the degradation of naproxen and diclofenac in various water matrices |
| description |
Given that drugs and their degradation products are
likely to occur as concoctions in wastewater, the degradation
of a mixture of two nonsteroidal anti-inflammatory drugs
(NSAIDs), diclofenac (DCF) and naproxen (NPX), was investigated
by solar photolysis and titanium dioxide (TiO2)-mediated
solar photocatalysis using an immersion-well
photoreactor. An equimolar ratio (1:1) of both NSAIDs in
distilled water, drinking water, and river water was subjected
to solar degradation. Solar photolysis of the DCF and NPX
mixture was competitive particularly in drinking water and
river water, as both drugs have the ability to undergo photolysis.
However, the addition of TiO2 in the mixture significantly
enhanced the degradation rate of both APIs compared to
solar photolysis alone. Mineralization, as measured by chemical
oxygen demand (COD), was incomplete under all
conditions investigated. TiO2-mediated solar photocatalytic
degradation of DCF and NPX mixtures produced 15 identifiable
degradants corresponding to degradation of the individual
NSAIDs, while two degradation products with much
higher molecular weight than the parent NSAIDs were identified
by liquid chromatography mass spectrometry (LC-MS)
and Fourier transform-ion cyclotron resonance-mass spectrometry
(FT-ICR-MS). This study showed that the solar light
intensity and the water matrix appear to be the main factors
influencing the overall performance of the solar photolysis
and TiO2-mediated solar photocatalysis for degradation of
DCF and NPX mixtures. |
| format |
Article |
| author |
Kanakaraju, Devagi Motti, Cherie A. Glass, Beverley D. Oelgemöller, Michael |
| author_facet |
Kanakaraju, Devagi Motti, Cherie A. Glass, Beverley D. Oelgemöller, Michael |
| author_sort |
Kanakaraju, Devagi |
| title |
Solar photolysis versus TiO2-mediated solar photocatalysis:
a kinetic study of the degradation of naproxen and diclofenac
in various water matrices |
| title_short |
Solar photolysis versus TiO2-mediated solar photocatalysis:
a kinetic study of the degradation of naproxen and diclofenac
in various water matrices |
| title_full |
Solar photolysis versus TiO2-mediated solar photocatalysis:
a kinetic study of the degradation of naproxen and diclofenac
in various water matrices |
| title_fullStr |
Solar photolysis versus TiO2-mediated solar photocatalysis:
a kinetic study of the degradation of naproxen and diclofenac
in various water matrices |
| title_full_unstemmed |
Solar photolysis versus TiO2-mediated solar photocatalysis:
a kinetic study of the degradation of naproxen and diclofenac
in various water matrices |
| title_sort |
solar photolysis versus tio2-mediated solar photocatalysis:
a kinetic study of the degradation of naproxen and diclofenac
in various water matrices |
| publisher |
Springer Verlag |
| publishDate |
2016 |
| url |
http://ir.unimas.my/12536/ http://ir.unimas.my/12536/ http://ir.unimas.my/12536/ http://ir.unimas.my/12536/1/Solar-photolysis-versus%209abstract%29.pdf |
| first_indexed |
2018-09-06T16:00:57Z |
| last_indexed |
2018-09-06T16:00:57Z |
| _version_ |
1610874520811339776 |