title: Sonodegradation of halomethane mixtures in chlorinated drinking water.
abstract: Ultrasonic degradation of halomethane mixtures, with very low initial concentration in chlorinated drinking water was investigated. It was observed that the removal efficiencies of four halomethanes after 1 h ultrasonic irradiation followed the increasing order: CHCl(3) < CHBr(2)Cl < CHBrCl(2) < CCl(4) and the degradation reactions of the halomethanes were well described by the pseudo-first-order kinetics model. Molecular polarity was found to be an important factor controlling the sonodegradation of halomethane mixtures. Increasing acoustic intensity enhanced the removal of halomethanes in chlorinated drinking water. In addition, ultrasonic irradiation led to a slightly decrease of pH and TOC of chlorinated drinking water.
authors.affiliation: Department of Environmental Science & Engineering, Nanjing University of Information Science & Technology, PR China. guocumt@eyou.com
authors.forename: Zhaobing
authors.initials: Z
authors.lastname: Guo
authors.forename: Chunhui
authors.initials: C
authors.lastname: Gu
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zheng
authors.forename: Ruo
authors.initials: R
authors.lastname: Feng
authors.forename: Fang
authors.initials: F
authors.lastname: Jiang
authors.forename: Guizhi
authors.initials: G
authors.lastname: Gao
authors.forename: Youfei
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D000162:Acoustics; D002713:Chlorine / Q000737:chemistry / Q000494:pharmacology*; D002849:Chromatography, Gas; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008697:Methane / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics; D014867:Water; D014874:Water Pollutants, Chemical
chemical_list: D014874:Water Pollutants, Chemical; D014867:Water; D002713:Chlorine; D008697:Methane