Oxidative and reductive degradation of sulfamethoxazole in aqueous solutions: decomposition efficiency and toxicity assessment

被引：0
作者：
Gyuri Sági
Tamás Csay
György Pátzay
Emil Csonka
László Wojnárovits
Erzsébet Takács
机构：
[1] Hungarian Academy of Sciences,Institute for Energy Security and Environmental Safety, Centre for Energy Research
[2] Budapest University of Technology and Economics,Department of Chemical and Environmental Process Engineering
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2014年 / 301卷
关键词：
Sulfamethoxazole; Degradation; Ionizing radiation; Advanced oxidation process; Hydroxyl radical;
D O I：
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学科分类号：
摘要：
Under radiolytic conditions at a concentration of 0.1 mmol dm−3 the reactions of sulfamethoxazole, a worldwide used anti-infective sulfonamide antibiotic, were mainly induced by hydroxyl radicals. With a dose of 5 kGy complete degradation of aromatic system was observed. The sulfur of the molecule was entirely transformed to SO42–, while NO3– and NH4+ were formed from the nitrogen content. The chemical oxygen demand and total organic carbon values indicated complete mineralization during irradiation. In pursuance of toxicity tests, the observed increase in mortality of Vibrio fischeri bacteria was mainly due to H2O2 formed during the radiolytic procedure. The results showed that the degradation was effective; therefore, the irradiation technology can be recommended for treatment of wastewater containing sulfamethoxazole.
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页码：475 / 482
页数：7
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