Degradation of pyrazinamide in aqueous solution by electron beam irradiation: kinetics, influence factors and mechanism study
Degradation of pyrazinamide in aqueous solution by electron beam irradiation: kinetics, influence factors and mechanism study
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电子束辐照降解水溶液中吡嗪酰胺的动力学、影响因素及机理研究
DOI：
10.1007/s10967-021-07757-1
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发表时间：
2021
影响因子：
1.6
通讯作者：
G.
中科院分区：
文献类型：
--
作者：
Zou;Q;Huo;Z. H;Shao;H. Y;Gu;J. Z;Xu;G.
研究了吡嗪酰胺（PZA）的电子束辐照降解.结果表明，在5 kGy辐照下，0.2mMPZA的去除率可达99%，降解动力学符合准一级动力学。CO 32-、HCO 3-、NO3-和富里酸的存在抑制了PZA的降解。H2 O2或K2 S2 O 8的加入有效地促进了PZA的降解和矿化。清除剂实验和量子化学计算表明，·OH是降解过程中的主要反应物种。中间体的鉴定和量子化学计算阐明了降解机理。
The degradation of pyrazinamide (PZA) by electron beam irradiation (EBI) was studied. It was found that the degradation of PZA was efficient with the removal rate of 99% for 0.2 mM PZA under 5 kGy, and the degradation kinetics followed pseudo-first-order kinetics. The presence of CO32−, HCO3−, NO3−, and fulvic acid inhibited the degradation of PZA. The addition of H2O2or K2S2O8effectively enhanced the degradation and mineralization of PZA. The scavenger experiments and quantum chemical calculations showed that·OH was the primary reactive species in the degradation. The identification of intermediates and quantum chemical calculations illustrated the mechanism of degradation.