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Received: 2005-08-31

Revision Accepted: 2005-11-29

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Journal of Zhejiang University SCIENCE B 2006 Vol.7 No.3 P.171-179


Study of removal effect on Mesocyclops leukarti with oxidants

Author(s):  Zuo Jin-Long, Cui Fu-Yi, Lin Tao

Affiliation(s):  School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China

Corresponding email(s):   mdjzjl@163.com

Key Words:  Oxidants, Chlorine, Chlorine dioxide, Mesocyclops leukarti, Preoxidation, Water safety

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Zuo Jin-Long, Cui Fu-Yi, Lin Tao. Study of removal effect on Mesocyclops leukarti with oxidants[J]. Journal of Zhejiang University Science B, 2006, 7(3): 171-179.

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DOI - 10.1631/jzus.2006.B0171

Cyclops of zooplankton propagates prolifically in eutrophic waterbody and it cannot be exterminated by conventional disinfection process. The mutagenicity of Mesocyclops leukarti and its extermination with oxidants in a drinking waterworks in China were studied. Among five oxidants for use in bench-scale, chlorine dioxide is the most effective and the potassium permanganate is the weakest against Mesocyclops leukarti under the same conditions. Full-scale results showed that Mesocyclops leukarti could be effectively removed from water by 1.0 mg/L chlorine dioxide preoxidation combined with conventional removal physical process. After filtration, chlorite, a by-product of prechlorine dioxide, is stable at 0.45 mg/L, which is lower than the critical value of the USEPA. GC-MS examination and Ames test further showed that the quantity of organic substance and the mutagenicity in water treated by chlorine dioxide preoxidation are obviously less than those of prechlorination.

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