Degradation of atrazine by microwave-assisted electrodeless discharge mercury lamp in aqueous solution.
The present study investigates the degradation of atrazine (2-chloro-4-(ethyl amino)-6-isopropyl amino-s-triazine) in aqueous solution by a developed new method, namely by means of a microwave-assisted electrodeless discharge mercury lamp (MW-EDML). An experimental design was conducted to assess the influence of various parameters: pH value, initial concentration, amount of EDML, initial volume and coexisted solvent. Atrazine was degraded completely by EDML in a relatively short time (i.e. t(1/2)=1.2 min for 10 mg/l). Additionally, the identification of main degradation products during atrazine degradation process was conducted by gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS). This study proposes the degradation mechanism including four possible pathways for atrazine degradation according to the degradation products.
Ta
Na
N
State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China. tanawu@sohu.com
Hong
Jun
J
Liu
Tingfeng
T
Sun
Cheng
C
D001280:Atrazine / Q000737:chemistry* / Q000302:isolation & purification; D002853:Chromatography, Liquid / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006863:Hydrogen-Ion Concentration; D008027:Light; D008628:Mercury; D008872:Microwaves; D012997:Solvents / Q000737:chemistry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
D012997:Solvents; D014874:Water Pollutants, Chemical; D008628:Mercury; D001280:Atrazine