Degradation of halogenated benzenes in solution by electron beam irradiation method.
In this work, the dehalogenation and degradation of halogenated benzenes (chlorobenzenes, bromobenzene) under electron beam radiation were investigated. Several factors affected the degradation of halogenated benzenes by the electron beam radiation method, such as the dose of the electron beam, the initial pH value of the solutions and the kind of halogen. The rule of dehalogenation and degradation followed the order: bromobenzene > 1,2,4-trichlorobenzene > p-dichlorobenzene > chlorobenzene. The final products were found to be benzene and diphenyl. Dehalogenation of halogenated benzenes occurred in the presence of NaOH. Based on the results, a general reaction pathway for the degradation of halogenated benzenes is proposed.
Wu
M
M
Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, China.
Shi
W
W
Wang
Y
Y
Jiao
Z
Z
Wang
J
J
Ding
G
G
Fu
J
J
D001554:Benzene / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D001969:Bromobenzenes / Q000737:chemistry*; D002722:Chlorobenzenes / Q000737:chemistry*; D004583:Electrons; D004785:Environmental Pollutants / Q000737:chemistry; D054879:Halogenation; D006863:Hydrogen-Ion Concentration; D011827:Radiation
D001554:Benzene; D001713:Biphenyl Compounds; D001969:Bromobenzenes; D002722:Chlorobenzenes; D004785:Environmental Pollutants; C010574:biphenyl; C032036:bromobenzene