title: Degradation of hexachlorobenzene by electron beam irradiation.
abstract: Hexachlorobenzene removal efficiencies in different solvents by electron beam irradiation were investigated. Several factors that might affect the removal efficiencies were further examined. At 10 kGy, HCB degradation value was 85.8% in the solvent of acetone:water mixture (20:80, v/v), while at the same dose, the reduction value of 42.6% was achieved in hexane solvent. In the solvent of acetone:water mixture (20:80, v/v), Na(2)CO(3) as additive could enhance the degradation efficiency by 4.5%. However, Triton X-100, NaNO(3), NaNO(2) and H(2)O(2) as additives reduced the degradation value by 20.0%, 6.3%, 85.7% and 20.5%, respectively. Furthermore, the increase of these additives would result in the decrease of the degradation efficiencies. The pH value of the solvent of acetone:water mixture (20:80, v/v) could affect HCB removal efficiency. At pH 11.8, reduction value of 90.2% was achieved at 10 kGy, while at the same dose, at pH 2.7 and 6.8, the reduction values were only 82.4% and 86.9%, respectively. At the same time, the degradation value of pentachlorobenzene was 94.7% at 10 kGy. In the presence or absence of additives, pH value of the solvent of acetone:water mixture (20:80, v/v) became lower with increasing dose after electron beam irradiation.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
authors.forename: Jibiao
authors.initials: J
authors.lastname: Zhang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zheng
authors.forename: Jingfei
authors.initials: J
authors.lastname: Luan
authors.forename: Guangjun
authors.initials: G
authors.lastname: Yang
authors.forename: Weihua
authors.initials: W
authors.lastname: Song
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhong
authors.forename: Zongchuan
authors.initials: Z
authors.lastname: Xie
mesh_terms: D004583:Electrons; D004785:Environmental Pollutants; D006581:Hexachlorobenzene / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration
chemical_list: D004785:Environmental Pollutants; D006581:Hexachlorobenzene