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The oxidative degradation of sulfadiazine at the interface of alpha-MnO2 and water

文献类型： 外文期刊

作者： Dong, Jun 2 ; Li, Yongtao 3 ; Zhang, Lijia 1 ; Liu, Chengshuai 1 ; Zhuang, Li 1 ; Sun, Lina 2 ; Zhou, Jianmin 1 ;

作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

2.Univ Elect Sci & Technol China, Zhongshan Inst, Zhongshan 528402, Peoples R China

3.S China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China

关键词： manganese dioxide;antibiotics;oxidation;interface;cryptomelane

期刊名称：JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY （ 影响因子：3.174； 五年影响因子：3.137 ）

ISSN： 0268-2575

年卷期： 2009 年 84 卷 12 期

页码：

收录情况： SCI

摘要： BACKGROUND: Sulfadiazine (SD), a widely used antibiotic chemical, has been detected in contaminated water and soils. Manganese dioxides are common minerals with a high redox potential and can act as active oxidants for SD degradation in wastewater treatment. RESULTS: alpha-MnO2 was used to promote SD oxidative degradation. At pH 4.6 and 25 degrees C, 92.7% of SD (0.02 mmol L-1) was degraded by 1.0 g L-1 alpha-MnO2. SO42- was detected as the inorganic end product from the mineralization of SD. The ecological toxicity index of average well color development (AWCD) in SD solution was 2.01 after the solution was degraded by alpha-MnO2 for 2 h, while the AWCD was 0.48 for the solution without alpha-MnO2 treatment. The degradation rate of SD can be improved by increasing the dosages of alpha-MnO2 and the reaction temperature, but the rate was limited by increased initial SD concentration and reaction pH. CONCLUSION: SD can be effectively degraded and mineralized with alpha-MnO2. These results are helpful for removing antibiotics by manganese dioxides in the environment, and also for exploring new technology for wastewater treatment. (C) 2009 Society of Chemical Industry

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