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Sonodegradation of halomethane mixtures in chlorinated drinking water |
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| Authors: | Guo Zhaobing Gu Chunhui Zheng Zheng Feng Ruo Jiang Fang Gao Guizhi Zheng Youfei |
| Institution: | aDepartment of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, PR China bState Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China cState Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, PR China |
| 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: CHCl3 < CHBr2Cl < CHBrCl2 < CCl4 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. |
| Keywords: | Ultrasonic irradiation Halomethane mixtures Chlorinated drinking water |
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