NDLI: Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI).

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Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI).

Content Provider	Europe PMC
Author	Ma, Yan Zhang, Kejia Li, Cong Zhang, Tuqiao Gao, Naiyun
Copyright Year	2015
Abstract	The photocatalytic degradation of sulfonamides in aqueous TiO2 suspension under UV irradiation has been investigated using potassium ferrate as electron acceptors. The results showed that the stability of Fe(VI) is dependent on pH significantly, and the stability reduces obviously in the presence of UV-TiO2. The experiments indicated that Fe(VI) could effectively scavenge the conduction band electrons from the surface of TiO2. The photocatalytic oxidation of sulfonamides with Fe(VI) was found to be much faster than that without Fe(VI). The SD, SM, and SMX concentration was greatly reduced by 89.2%, 83.4%, and 82.0%, respectively, after 10 min with UV-TiO2-Fe(VI), comparing to 65.2%, 66.0%, and 71.9%, respectively, with Fe(VI) only in the dark and 71.3%, 72.7%, and 76.0%, respectively, with UV-TiO2. The pH value of solution significantly influenced the sulfonamides degradation in UV-TiO2-Fe(VI) system. The degradation amount of sulfonamides after 10 min was a maximum at pH 7. The intermediate products of sulfonamides oxidation by UV-TiO2-Fe(VI) were analysed by LC-HESI-MS-MS and the results suggested that a majority of sulfonamides turned into large-molecule products without complete mineralization.
ISSN	23146133
Journal	Biomed Research International
Volume Number	2015
PubMed Central reference number	PMC4548100
PubMed reference number	26347888
e-ISSN	23146141
DOI	10.1155/2015/973942
Language	English
Publisher	Hindawi
Publisher Date	2015-08-11
Access Restriction	Open
Rights License	This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2015 Yan Ma et al.
Content Type	Text
Resource Type	Article
Subject	Immunology and Microbiology Medicine Biochemistry, Genetics and Molecular Biology

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