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Effect of O3/H2O2 molar concentration ratio at different pH values on cyclophosphamide degradation

2005; UWA Publishing; Volume: 54; Issue: 7 Linguagem: Inglês

10.2166/aqua.2005.0038

1365-2087

Mayra Bataller Venta, Carlos Castro, Lidia Asela Fernández García, Adaris López Marzo, Eliet Véliz Lorenzo, Caridad Álvarez Álvarez,

Membrane Separation Technologies

Research Article| November 01 2005 Effect of O3/H2O2 molar concentration ratio at different pH values on cyclophosphamide degradation Mayra Bataller Venta; Mayra Bataller Venta 1Ozone Research Center, PO Box 6414, PlayaHavana,Cuba Tel.: 53 7 271-1157, 53 7 271-1335; E-mail: mayra.bataller@cnic.edu.cu Search for other works by this author on: This Site PubMed Google Scholar Carlos Hernández Castro; Carlos Hernández Castro 1Ozone Research Center, PO Box 6414, PlayaHavana,Cuba Search for other works by this author on: This Site PubMed Google Scholar Lidia Asela Fernández García; Lidia Asela Fernández García 1Ozone Research Center, PO Box 6414, PlayaHavana,Cuba Search for other works by this author on: This Site PubMed Google Scholar Adaris López Marzo; Adaris López Marzo 1Ozone Research Center, PO Box 6414, PlayaHavana,Cuba Search for other works by this author on: This Site PubMed Google Scholar Eliet Véliz Lorenzo; Eliet Véliz Lorenzo 1Ozone Research Center, PO Box 6414, PlayaHavana,Cuba Search for other works by this author on: This Site PubMed Google Scholar Caridad Álvarez Álvarez Caridad Álvarez Álvarez 1Ozone Research Center, PO Box 6414, PlayaHavana,Cuba Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2005) 54 (7): 403–410. https://doi.org/10.2166/aqua.2005.0038 Article history Received: December 13 2004 Accepted: June 26 2005 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Twitter LinkedIn Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Mayra Bataller Venta, Carlos Hernández Castro, Lidia Asela Fernández García, Adaris López Marzo, Eliet Véliz Lorenzo, Caridad Álvarez Álvarez; Effect of O3/H2O2 molar concentration ratio at different pH values on cyclophosphamide degradation. Journal of Water Supply: Research and Technology-Aqua 1 November 2005; 54 (7): 403–410. doi: https://doi.org/10.2166/aqua.2005.0038 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex The effect of O3/H2O2 liquid phase molar concentration ratio at different pH on cyclophosphamide degradation rate was evaluated. The combination of O3/H2O2 leads to an increase of cyclophosphamide degradation rate, compared with single ozonation at the same pH and ozone dosages. It was found that cyclophosphamide degradation rate with O3/H2O2 depends on pH for the molar concentration ratios under study, the fastest degradation being observed for molar concentration ratio near 3.4 at pH 7 (80% degradation in 3 minutes). Pseudo-first order reaction rate constants for cyclophosphamide degradation were determined under the experimental conditions of this study. Cyclophosphamide was not detected after 15 minutes of reaction, but only a partial mineralization was obtained, evidenced by a total organic carbon removal lower than 60%. By attenuated total reflection infrared spectroscopy and electrospray ionization tandem mass spectrometry, 4-ketocyclophosphamide was identified as one of the main reaction products at pH 7 and 3.4 molar concentration ratio. advanced oxidation, cyclophosphamide, hydrogen peroxide, ozone This content is only available as a PDF. © IWA Publishing 2005 You do not currently have access to this content.