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.
周骏, 闫国杰, 施曙东, 王琦, 李文超, 石寒松. UV/(亚)硝酸盐体系氯代硝基物降解及机理研究[J]. 中国环境科学, 2017, 37(8): 2924-2929.
ZHOU Jun, YAN Guo-jie, SHI Shu-dong, WANG Qi, LI Wen-chao, SHI Han-song. Degradation and transformation mechanism of chlorinated nitroaromatic compounds within UV/NO2-/NO3- system. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(8): 2924-2929.
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