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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Language:English
Published: Wiley 2006-01-01
Series:International Journal of Photoenergy
Online Access:http://www.hindawi.com/GetArticle.aspx?doi=10.1155/IJP/2006/47418
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description <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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spelling doaj-art-1c75d0279f5b4759a70c69bd12d825aa2025-02-03T05:46:32ZengWileyInternational Journal of Photoenergy1110-662X2006-01-012006Photodegradation 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> </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>http://www.hindawi.com/GetArticle.aspx?doi=10.1155/IJP/2006/47418
spellingShingle Photodegradation of Lincomycin in Aqueous Solution
International Journal of Photoenergy
title Photodegradation of Lincomycin in Aqueous Solution
title_full Photodegradation of Lincomycin in Aqueous Solution
title_fullStr Photodegradation of Lincomycin in Aqueous Solution
title_full_unstemmed Photodegradation of Lincomycin in Aqueous Solution
title_short Photodegradation of Lincomycin in Aqueous Solution
title_sort photodegradation of lincomycin in aqueous solution
url http://www.hindawi.com/GetArticle.aspx?doi=10.1155/IJP/2006/47418