Catalytic ozonation for the removal of organic contaminants in water on alumina

Amir Ikhlaq, D R Brown, Barbara Kasprzyk-Hordern

Research output: Contribution to journalArticle

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Abstract

This study aims to understand the efficiency and role of adsorption of common water pollutants (volatile organic chemicals (VOCs), pharmaceuticals and carboxylic acids) in the catalytic ozonation process on-alumina. In order to understand the catalytic processes occurring, the effects of pH, hydroxyl radical
scavengers, humic acids and phosphates on the efficiency of catalytic ozonation on alumina were studied. The results revealed that catalytic ozonation on alumina could substantially enhance the removal of ibuprofen and acetic acid when compared with ozonation alone. However, alumina did not catalyse the
removal of VOCs. The adsorption of pollutants plays a key role in the effectiveness of this process. The presence of hydroxyl radical scavengers, phosphates and humic acids had a significant effect on the removal of pollutants on alumina. It is therefore suggested that catalytic ozonation of organic pollutants on alumina proceeds via a radical mechanism that involves reactions of hydroxyl radicals with pollutants adsorbed on the surface of alumina.
Original languageEnglish
Pages (from-to)408-418
JournalApplied Catalysis B: Environmental
Volume165
Early online date14 Oct 2014
DOIs
Publication statusPublished - Apr 2015

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Ozonization
Aluminum Oxide
aluminum oxide
Alumina
Impurities
pollutant
Water
hydroxyl radical
Hydroxyl Radical
Organic Chemicals
Humic Substances
Organic chemicals
water
scavenger
humic acid
Phosphates
Water Pollutants
phosphate
adsorption
Adsorption

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Catalytic ozonation for the removal of organic contaminants in water on alumina. / Ikhlaq, Amir ; Brown, D R; Kasprzyk-Hordern, Barbara.

In: Applied Catalysis B: Environmental, Vol. 165, 04.2015, p. 408-418.

Research output: Contribution to journalArticle

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