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

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Abstract

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”.

Key words： p-hydroquinone persulfate activation rhodamine B kinetic characteristics of degradation

Received: 08 November 2015

PACS:

X703

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	ZHU Wei-huang
	WANG Hong-wei
	LIU Wen-qi

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ZHU Wei-huang,WANG Hong-wei,LIU Wen-qi. The characteristics of degradation of rhodamine B by quinone-activated persulfate process[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1732-1737.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I6/1732

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