Research on sulfamethazine degradation by gamma irradiation in aqueous solution
LIU Yuan-kun1, WANG Jian-long2
1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
2. Laboratory of Environmental Technology, Institute of Nuclear and New Energy, Tsinghua University, Beijing 100084, China
Sulfamethazine (SMT) was selected as a kind of typical sulphonamides pharmaceuticals for this research. The degradation of SMT was investigated by gamma irradiation, which presented high efficiency. Experiments and theoretical analysis were used to determine degradation characteristics of SMT. Byproducts and the variation of them were discussed based on the chromatographic and chemical analysis. The influence of initial SMT concentrations, pH values, O2 and N2 and ·OH radical scavenger on SMT degradation was determined. The experimental results showed that it was better for the SMT degradation and TOC removal in low initial SMT concentration, neutral and high dissolved oxygen solution. The degradation reaction was much inhibited by the ·OH radical scavenger, which indicated that most of the SMT degradation was contributed by the oxidation of ·OH radicals. Therefore in the wastewater treatment the removal efficiency of sulphonamides pharmaceuticals could be improved by changing the concentration, adjusting the pH value and/or increasing the aeration.
刘元坤, 王建龙. 水中磺胺二甲基嘧啶的辐照降解研究[J]. 中国环境科学, 2017, 37(1): 123-130.
LIU Yuan-kun, WANG Jian-long. Research on sulfamethazine degradation by gamma irradiation in aqueous solution. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(1): 123-130.
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