Study of the radiolytic degradation of Zectran in water by LC-MS/MS

被引：0

作者：

F. Boujelbane

K. Nasr

H. Saadaoui

K. Krifi

H. Manh Bui

S. Takriti

机构：

[1] CNSTN,Research Laboratory on Matter and Energy for Nuclear Science Development

[2] LR16CNSTN02,Radiochemistry Laboratory

[3] CNSTN,Sciences and Environmental Techonologies Laboratory

[4] High Institute of Environmental Sciences and Technologies of Borj Cedria,Faculty of Science of Bizerte

[5] University of Carthage,Institute of Environmental Sciences

[6] University of Carthage,undefined

[7] Nguyen Tat Thanh University,undefined

[8] AAEA,undefined

[9] Arab Atomic Energy Agency,undefined

来源：

International Journal of Environmental Science and Technology | 2022年 / 19卷

关键词：

Zectran; Gamma irradiation; Kinetic of degradation; LC-MS; MS; Kinetic model;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Intensive agriculture requires the use of several phytosanitary products. Pesticides of the carbamate family are used to eliminate the crop pests by acting on their nervous system. This study aims to determine the kinetic degradation of Zectran, the 4-(dimethylamino)-3,5-dimethylphenyl N-methylcarbamate (20 mg L−1) using 60Co gamma radiation source. The absorbed doses were analyzed by Liquid Chromatography (LC-DAD) using a column RP-18 PRISM (250 mm × 4,6 mm, 5 µm) and a mobile phase composed with a mixture of acetonitrile and water (70/30). The results showed that the Zectran was completely eliminated at absorbed dose of 6 kGy. The pseudo-first kinetic order could describe the removal of Zectran by gamma radiation with kobs = 0.389 kGy−1. The degradation mechanism by gamma irradiation was proposed based on the analysis of the by-products using an LC coupled to a QTOF mass spectrometer. The kinetic rates of the two intermediate compounds were calculated.

引用

页码：2939 / 2950

页数：11