Caffeine degradation in water by gamma irradiation, ozonation and ozonation/gamma irradiation

Torun Murat; Abbasova Dinara; Şolpan Dilek; Güven Olgun

doi:10.2478/nuka-2014-0004

Nukleonika (Mar 2014)

Caffeine degradation in water by gamma irradiation, ozonation and ozonation/gamma irradiation

Torun Murat,
Abbasova Dinara,
Şolpan Dilek,
Güven Olgun

Affiliations

Torun Murat: Department of Chemistry, Hacettepe University, 06800 Beytepe, Ankara, Turkey, Tel.: +90 312 297 7988, Fax: +90 312 299 2163
Abbasova Dinara: Institute of Radiation Problems of Azerbaijan National Academy of Science, 9 B. Vakhabzade Str., Baku, Azerbaijan
Şolpan Dilek: Department of Chemistry, Hacettepe University, 06800 Beytepe, Ankara, Turkey, Tel.: +90 312 297 7988, Fax: +90 312 299 2163
Güven Olgun: Department of Chemistry, Hacettepe University, 06800 Beytepe, Ankara, Turkey, Tel.: +90 312 297 7988, Fax: +90 312 299 2163

DOI: https://doi.org/10.2478/nuka-2014-0004
Journal volume & issue: Vol. 59, no. 1
pp. 25 – 35

Abstract

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Aqueous solutions of caffeine were treated with ozone and gamma irradiation. The amounts of remaining caffeine were determined after solid phase extraction as a function of absorbed dose and ozonation time. In addition to this, some important parameters such as inorganic ions, chemical oxygen demand (COD) dissolved oxygen and total acidity changes were followed. Caffeine (50 ppm) is found to be completely decomposed at 3.0 kGy and 1.2 kGy doses in the absence of H2O2 and in 1.20 mM H2O2 solutions, respectively. In the case of gamma irradiation after ozonation, 50 ppm caffeine was removed at 0.2 kGy when the solution was ozonized for 100 s at a rate of 10 g O3 h-1 in 400 mL 50 ppm paracetamol solution.

Published in Nukleonika

ISSN: 0029-5922 (Print); 1508-5791 (Online)
Publisher: Sciendo
Country of publisher: Poland
LCC subjects: Science
Website: https://sciendo.com/journal/NUKA

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