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

被引：0

作者：

Venta, MB ^{[1
]}

Castro, CH ^{[1
]}

García, LAF ^{[1
]}

Marzo, AL ^{[1
]}

Lorenzo, EV ^{[1
]}

Alvarez, CA ^{[1
]}

机构：

[1] Ozone Res Ctr, Havana, Cuba

来源：

JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA | 2005年 / 54卷 / 07期

关键词：

advanced oxidation; cyclophosphamide; hydrogen peroxide; ozone;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effect of O-3/H2O2 liquid phase molar concentration ratio at different pH on cyclophosphamide degradation rate was evaluated. The combination Of O-3/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 O-3/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.

引用

页码：403 / 410

页数：8

共 21 条

[1] Treatability of simulated reactive dye-bath wastewater by photochemical and non-photochemical advanced oxidation processes [J].