丙酮/氯离子协同活化过一硫酸盐降解酸性橙

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Abstract

Acetone and chloride ion (Cl^-) were used to synergistically activate peroxymonosulfate (PMS) to decolorize the azo dye, acid orange 7 (AO7). It was found that the first-order rate constant increased from 0.0767 to 0.1725min^-1 when acetone was added in Cl^-/PMS systemIn the acetone/Cl^-/PMS system, effect of various factors were explored, including initial pH, Cl^- concentration, PMS and acetone dosage. The results indicated that the degradation of AO7 increased with the increase of Cl^-、PMS、acetone concentration under alkaline conditions. The degradation mechanism of AO7 in acetone/Cl^-/PMS system showed that neither sulfate radical(SO-4·) nor hydroxyl(HO·) was produced therein. Instead, the HOCl concentration was proved to be increased during the reaction. Hence, acetone could promote the reaction between PMS and Cl^- to generate more HOCl. From the analysis of UV-vis spectra, the azo bond and naphthalene ring in AO7 was found being destructed.

Key words： chloride ion peroxymonosulfate acetone acid orange 7 hypochlorous acid

Received: 18 April 2018

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	ZHANG Ke
	XU Fen
	CHEN Jia-bin
	WAN Ling
	HUANG Tian-yin

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ZHANG Ke,XU Fen,CHEN Jia-bin等. Acetone and chloride ion Synergistically activate peroxymonosulfate to decolorize acid orange[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(11): 4159-4165.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I11/4159

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