醇类对UV-Fenton体系羟基自由基淬灭效率的影响

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Abstract The comparative experiment of scavenging efficiencies of alcohols to hydroxyl radical (·OH) in UV-Fenton system was designed. In homogeneous and heterogeneous UV-Fenton systems, the effects of alcohol species and initial concentration on scavenging rate to ·OH was studied. And the concentration of ·OH was quantified by fluorescence spectra measurement in heterogeneous UV-Fenton system with alcohols as scavenging reagents. The results showed that the scavenging ability of alkanols to ·OH was in the order tert-butanol > isopropanol > ethanol > n-propanol > n-butanol > methanol, and as for polybasic alcohols, its scavenging ability to ·OH enhanced with increasing chain length and hydroxyl number. Among those alcohols, the two stage scavenging rates of glycerol to ·OH in heterogeneous UV-Fenton system were 86.7% and 61.7%, respectively; which were 79.6% and 65.6% in homogeneous UV-Fenton system. The results indicated that glycerol could scavenge ·OH high efficiently and stably in both homogeneous and heterogeneous UV-Fenton systems and can be used as a new efficient scavenger to hydroxyl radical.

Key words： alcohol glycerol UV-Fenton hydroxyl radicals scavenging efficiency

Received: 10 June 2017

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X503

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	Articles by authors
	DAI Hui-wang
	CHEN Jian-xin
	MIAO Xiao-zeng
	JIANG Bo-quan
	GONG Xian

Cite this article:

DAI Hui-wang,CHEN Jian-xin,MIAO Xiao-zeng等. Effect of alcohols on scavenging efficiencies to hydroxyl radical in UV-Fenton system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(1): 202-209.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2018/V38/I1/202

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