Photodegradation of Lincomycin in Aqueous Solution
<p>Aqueous solutions of lincomycin were irradiated with UV light in homogeneous and heterogeneous systems. Lincomycin disappeared in both systems but the presence of <mml:math> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>TiO</mml:mtext> <...
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| Format: | Article |
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| Language: | English |
| Published: |
Wiley
2006-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://www.hindawi.com/GetArticle.aspx?doi=10.1155/IJP/2006/47418 |
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| Summary: | <p>Aqueous solutions of lincomycin were irradiated with UV light in homogeneous and heterogeneous systems. Lincomycin disappeared in both systems but the presence of <mml:math> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>TiO</mml:mtext> </mml:mrow> <mml:mtext>2</mml:mtext> </mml:msub> </mml:mrow> </mml:math> noticeably accelerated the degradation of the antibiotic in comparison with direct photolysis. The rate of decomposition was dependent on the concentration of lincomycin and followed a pseudo-first-order kinetics. Photolysis involved only the oxidation of lincomycin without mineralization. Differently, the treatment with <mml:math> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>TiO</mml:mtext> </mml:mrow> <mml:mtext>2</mml:mtext> </mml:msub> </mml:mrow> </mml:math> and UV light resulted in a complete mineralization of the antibiotic. The degradation pathways involved S- and N-demethylation and propyldealkylation. The mineralization of the molecule led to the formation of sulfate, ammonium, and nitrate ions.</p> |
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| ISSN: | 1110-662X |