UV/(亚)硝酸盐体系氯代硝基物降解及机理研究

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Abstract

Degradation kinetics and substituents transformation mechanisms of different substituted phenols (4C2NP/4N2CP/2NP/4CP) in the objective UV/NO₂^-/NO₃^- system were investigated. In this study, several specific decomposition mechanisms of the studied substrates were proposed. At pH=1.50, the highest reaction rate constant was observed in the UV/NO₂^-/NO₃^- system, reaching 10.3×10^-4min^-1. In the objective UV/NO₂^-/NO₃^- system, the decomposition rate of 2NP was inhibited indistinctively at different pH values due to the characteristic of nitro substituent having an significantly negative influence in benzene activation. Based on the major intermediates identified, re-nitration, chlorination, denitrochlorination and oxidation mechanisms were mainly involved in UV/NO₂^-/NO₃^-/4CP system, which revealed the release/accumulation processes of nitro substituent and the mutual transformations between chloro substituent and chloride ion.

Key words： ultraviolet light nitrite/nitrate nitrating agents chloro/nitro substituents transformation mechanism

Received: 28 December 2016

PACS:

X703

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	Articles by authors
	ZHOU Jun
	YAN Guo-jie
	SHI Shu-dong
	WANG Qi
	LI Wen-chao
	SHI Han-song

Cite this article:

ZHOU Jun,YAN Guo-jie,SHI Shu-dong等. Degradation and transformation mechanism of chlorinated nitroaromatic compounds within UV/NO₂^-/NO₃^- system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(8): 2924-2929.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I8/2924

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