The characteristics of degradation of rhodamine B by quinone-activated persulfate process
ZHU Wei-huang, WANG Hong-wei, LIU Wen-qi
Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China
The current study mainly investigated the influences of concentration of HQ, pH, and temperature on the characteristics of rhodamine B degradation by HQ -activated persulfate process. The results showed the extent of rhodamine B degradation was enhanced significantly by persulfatein the presence of activator (HQ). The extent of rhodamine B degradation in acid reaction systems was higher than those in basic reaction system during HQ-activated persulfate process.And the extent of rhodamine B degradation also increased with the increasing contents of HQ. A linear relationship exists between reaction rate constants and HQ contents with correlation coefficients R2 in a range from 0.9498 to 0.9951. Furthermore, in the presence of HQ, the activation energies decreased from 41.99kJ/mol to 13.90kJ/mol, and consequently, the reaction rate and efficiency of rhodamine B degradation were elevated high enough to 90 percent and the reaction rate constant increased by 106 percent. It was attributed to the semi-quinone racial generated by the HQ in reaction system, because semi-quinone racial could effectively activate the persulfate. Thus the efficiency of rhodamine B degradation was enhanced significantly in the interaction system of “HQ-RhB-persulfate”.
朱维晃, 王宏伟, 刘文奇. 对苯醌活化过硫酸盐降解罗丹明B的动力学特征及其影响因素[J]. 中国环境科学, 2016, 36(6): 1732-1737.
ZHU Wei-huang, WANG Hong-wei, LIU Wen-qi. The characteristics of degradation of rhodamine B by quinone-activated persulfate process. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1732-1737.
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