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Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI).
Biomed Res Int. 2015; 2015:973942.BR

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.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China ; Shanghai Urban Water Resources Development and Utilization National Engineering Center Co. Ltd., Shanghai 200082, China.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China ; Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou 310058, China.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China ; Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou 310058, China.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China ; Key Laboratory of Drinking Water Safety and Distribution Technology of Zhejiang Province, Zhejiang University, Hangzhou 310058, China.State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26347888

Citation

Ma, Yan, et al. "Oxidation of Sulfonamides in Aqueous Solution By UV-TiO2-Fe(VI)." BioMed Research International, vol. 2015, 2015, p. 973942.
Ma Y, Zhang K, Li C, et al. Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI). Biomed Res Int. 2015;2015:973942.
Ma, Y., Zhang, K., Li, C., Zhang, T., & Gao, N. (2015). Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI). BioMed Research International, 2015, 973942. https://doi.org/10.1155/2015/973942
Ma Y, et al. Oxidation of Sulfonamides in Aqueous Solution By UV-TiO2-Fe(VI). Biomed Res Int. 2015;2015:973942. PubMed PMID: 26347888.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI). AU - Ma,Yan, AU - Zhang,Kejia, AU - Li,Cong, AU - Zhang,Tuqiao, AU - Gao,Naiyun, Y1 - 2015/08/11/ PY - 2015/02/02/received PY - 2015/03/14/accepted PY - 2015/9/9/entrez PY - 2015/9/9/pubmed PY - 2016/6/9/medline SP - 973942 EP - 973942 JF - BioMed research international JO - Biomed Res Int VL - 2015 N2 - 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. SN - 2314-6141 UR - https://www.unboundmedicine.com/medline/citation/26347888/Oxidation_of_Sulfonamides_in_Aqueous_Solution_by_UV_TiO2_Fe_VI__ L2 - https://dx.doi.org/10.1155/2015/973942 DB - PRIME DP - Unbound Medicine ER -