Kinetic and analytical study of the photo-induced degradation of monuron by nitrates and nitrites under irradiation or in the dark
作者:Hadjira Boucheloukh、Tahar Sehili、Nadia Kouachi、Kamel Djebbar
DOI:10.1039/c2pp25044f
日期:2012.8
investigated in an aqueous solution containing nitrates and nitrites at 310 nm and 365 nm, respectively. In both NO3− and NO2− conditions, the degradation of monuron followed pseudo-first order kinetics. The intermediate products were identified by GC-MS, and the nitration, hydroxylation and coupling reactions were determined. In addition, the oxidation of the N-terminus group, the substitution of chlorine
在含有硝酸盐和亚硝酸盐的水溶液中,分别在310 nm和365 nm处研究了Monuron(3-(4-氯苯基)-1,1二甲基脲)的光诱导转化。在这两种NO 3 -和NO 2 -的条件下,灭草隆的降解,接着准一级动力学。通过GC-MS鉴定中间产物,并测定硝化,羟基化和偶联反应。此外,N-末端基团的氧化,氯的被OH取代,并通过没有硝化2观察到在苯环上的自由基。在可变的pH,诱导剂浓度,底物浓度,腐殖酸,氧含量和用作羟基自由基清除剂的盐的条件下,研究了Monuron的光诱导转化。所有上述参数都严重影响了光降解速率。灭草隆的降解,还研究在黑暗中和在NO存在2 -以及在通过添加过氧化氢的水溶液。