Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2

The nonsteroidal anti-inflammatory drug sodium diclofenac (DC) is an emerging water pollutant which resists conventional wastewater treatments. Here the sonophotocatalytic degradation of DC was carried out using micrometric TiO2 (both pristine and Ag-decorated), UV-A irradiation and 20 kHz pulsed ul...

Full description

Main Authors: Meroni, D., Jiménez-Salcedo, M., Falletta, E., Bresolin, B.M., Kait, C.F., Boffito, D.C., Bianchi, C.L., Pirola, C.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.29929 /
Published: Elsevier B.V. 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083101242&doi=10.1016%2fj.ultsonch.2020.105123&partnerID=40&md5=45f288e90b6866d89f09d30a4f3f11e9
http://eprints.utp.edu.my/29929/
Tags: Add Tag
No Tags, Be the first to tag this record!
id utp-eprints.29929
recordtype eprints
spelling utp-eprints.299292022-03-25T03:14:39Z Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2 Meroni, D. Jiménez-Salcedo, M. Falletta, E. Bresolin, B.M. Kait, C.F. Boffito, D.C. Bianchi, C.L. Pirola, C. The nonsteroidal anti-inflammatory drug sodium diclofenac (DC) is an emerging water pollutant which resists conventional wastewater treatments. Here the sonophotocatalytic degradation of DC was carried out using micrometric TiO2 (both pristine and Ag-decorated), UV-A irradiation and 20 kHz pulsed ultrasound. Sonophotocatalytic tests were compared with photolysis, sonolysis, sonophotolysis, sonocatalysis and photocatalysis data performed in the same conditions. A synergy index of over 2 was determined for tests with pristine TiO2, while values close to 1.3 were observed for Ag-TiO2. Reaction intermediates were studied by HPLC�MS, showing degradation mechanisms activated by hydroxyl radicals. Similar pathways were identified for photocatalytic and sonophotocatalytic tests, although the latter led to more oxidized compounds. Different reactor configurations (static and dynamic set ups) were studied. Sequential and simultaneous application of UV light and ultrasound led to similar performance. The role of water matrix was investigated using ultrapure and drinking water, showing marked detrimental effects of electrolytes on the DC degradation. Overall, the combined treatment proved more efficient than photocatalysis alone especially in demanding working conditions, like in drinking water matrices. © 2020 Elsevier B.V. Elsevier B.V. 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083101242&doi=10.1016%2fj.ultsonch.2020.105123&partnerID=40&md5=45f288e90b6866d89f09d30a4f3f11e9 Meroni, D. and Jiménez-Salcedo, M. and Falletta, E. and Bresolin, B.M. and Kait, C.F. and Boffito, D.C. and Bianchi, C.L. and Pirola, C. (2020) Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2. Ultrasonics Sonochemistry, 67 . http://eprints.utp.edu.my/29929/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The nonsteroidal anti-inflammatory drug sodium diclofenac (DC) is an emerging water pollutant which resists conventional wastewater treatments. Here the sonophotocatalytic degradation of DC was carried out using micrometric TiO2 (both pristine and Ag-decorated), UV-A irradiation and 20 kHz pulsed ultrasound. Sonophotocatalytic tests were compared with photolysis, sonolysis, sonophotolysis, sonocatalysis and photocatalysis data performed in the same conditions. A synergy index of over 2 was determined for tests with pristine TiO2, while values close to 1.3 were observed for Ag-TiO2. Reaction intermediates were studied by HPLC�MS, showing degradation mechanisms activated by hydroxyl radicals. Similar pathways were identified for photocatalytic and sonophotocatalytic tests, although the latter led to more oxidized compounds. Different reactor configurations (static and dynamic set ups) were studied. Sequential and simultaneous application of UV light and ultrasound led to similar performance. The role of water matrix was investigated using ultrapure and drinking water, showing marked detrimental effects of electrolytes on the DC degradation. Overall, the combined treatment proved more efficient than photocatalysis alone especially in demanding working conditions, like in drinking water matrices. © 2020 Elsevier B.V.
format Article
author Meroni, D.
Jiménez-Salcedo, M.
Falletta, E.
Bresolin, B.M.
Kait, C.F.
Boffito, D.C.
Bianchi, C.L.
Pirola, C.
spellingShingle Meroni, D.
Jiménez-Salcedo, M.
Falletta, E.
Bresolin, B.M.
Kait, C.F.
Boffito, D.C.
Bianchi, C.L.
Pirola, C.
Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2
author_sort Meroni, D.
title Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2
title_short Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2
title_full Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2
title_fullStr Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2
title_full_unstemmed Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO2
title_sort sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized tio2
publisher Elsevier B.V.
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85083101242&doi=10.1016%2fj.ultsonch.2020.105123&partnerID=40&md5=45f288e90b6866d89f09d30a4f3f11e9
http://eprints.utp.edu.my/29929/
_version_ 1741197322180624384
score 11.62408

Similar Items