State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
J Hazard Mater. 2009 Dec 30;172(2-3):675-84. doi: 10.1016/j.jhazmat.2009.07.050. Epub 2009 Jul 22.
The ultraviolet (UV) photolysis of atrazine in aqueous solution was investigated at wavelength of 254 nm in this study. This paper was mainly focused on the identification of atrazine degradation intermediates by HPLC-MS/MS and its degradation mechanisms. The photodegradation products included the following seven classes: dechloro-hydroxylated products, chloro-dealkylated products, dechloro-dealkylated products, alkylic-oxidated products, delamination-hydroxylated products, olefinic products, and dechloro-hydrogenated products which were never reported in direct photolytic process, 4-isopropylamino-6-ethylamino-s-triazine (IEST), 4,6-dihydroxy-s-triazine (OOST). The main degradation products were 2-hydroxy-4-acetamido-6-ethylamino-s-triazine (OIET), 2-chloro-4-isopropyl-amino-6-methylamino-s-triazine (CIMT), 2-chloro-4,6-divinylamino-s-triazine (CVVT), 2-chloro-4-ethylamino-6-amino-s-triazine(CEAT), 2-methoxy-4-isopropyl-amino-6-methylamino-s-triazine (OIMT), 2-hydroxy-4-acetamindo-6-ethylamino-s-triazine (ODET), etc. Finally, the possible degradation mechanism was also proposed here.
本研究在 254nm 波长下考察了水中莠去津的紫外（UV）光解情况。本文主要通过 HPLC-MS/MS 鉴定莠去津的降解中间产物及其降解机制。光降解产物包括以下 7 类：脱氯羟基化产物、氯脱烷基产物、脱氯脱烷基产物、烷基氧化产物、分层羟基化产物、烯烃产物和脱氯氢化产物，这些产物从未在直接光解过程中报道过，此外还包括 4-异丙基氨基-6-乙基氨基-s-三嗪（IEST）和 4,6-二羟基-s-三嗪（OOST）。主要降解产物为 2-羟基-4-乙酰胺基-6-乙基氨基-s-三嗪（OIET）、2-氯-4-异丙基氨基-6-甲基氨基-s-三嗪（CIMT）、2-氯-4,6-二乙烯基氨基-s-三嗪（CVVT）、2-氯-4-乙氨基-6-氨基-s-三嗪（CEAT）、2-甲氧基-4-异丙基氨基-6-甲基氨基-s-三嗪（OIMT）、2-羟基-4-乙酰胺基-6-乙基氨基-s-三嗪（ODET）等。最后，本文还提出了可能的降解机制。
