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Effects of pre-ozonation on formation of nitrogenous disinfection by-products: review and analysis |
College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China |
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Abstract To control nitrogenous disinfection by-products (N-DBPs), the effects of ozonation pretreatment on the generation of N-DBPs were investigated. Three typical types of N-DBPs of nitrosamine, halogenated nitromethane and haloacetonitrile were chosen as research subjects. Based on the formation mechanisms,the effects of pre-ozonation on the formation of N-DBPs during chloramination were reviewed and analyzed. The results indicate that in most cases, ozonation pretreatment can reduce the formation of N-DBPs. However, for some special water sources, the ozonation pretreatment makes the formation of N-DBPs increase mainly due to the existence of high potential precursors of N-DBPs.Based on the present research, some issues needed to be further studied in the future were proposed.
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Received: 22 February 2017
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