Dependence of Sulfadiazine Oxidative Degradation on Physicochemical Properties of Manganese Dioxides
文献类型： 外文期刊
作者： Liu, Chengshuai 1 ; Zhang, Lijia 1 ; Li, Fangbai 1 ; Wang, Yan 1 ; Gao, Yun 1 ; Li, Xiangzhong 2 ; Cao, Weidong 3 ; Feng, 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.Hong Kong Polytech Univ, Dept Civil & Struct Engn, Hong Kong, Hong Kong, Peoples R China
3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
4.S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China
5.Univ Elect Sci & Technol China, Zhongshan Inst, Zhongshan 528402, Peoples R China
6.Univ El
期刊名称：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH （ 影响因子：3.72； 五年影响因子：3.99 ）
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收录情况： SCI
摘要： Manganese dioxides as active oxidants are the common minerals in environment, and different types of manganese dioxides may exhibit varied oxidative activity. In this study, eight manganese dioxides were used to conduct sulfadiazine (SD) oxidative degradation. SD can be oxidatively degraded and even mineralized by these manganese dioxides, and the toxicity of the SD sample can also be reduced significantly. The experiments in this study demonstrated that the kinetic reaction rate constant k values of SD degradation strongly depended on the physicochemical properties of different manganese dioxides, including average oxidation state (AOS), reductive potential (Eh), pH at the point of zero charge (pH_(pzc)), and apparent activation energy (E_a). The k values were positively correlated with the AOS and Eh, while negatively correlated with pH_(PZC) and E_a. The values of these physicochemical properties can be used to quantitatively estimate the oxidative activity of a manganese dioxide to some extent for better understanding of the degradation of organic pollutants with manganese dioxides.
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