title: Study of removal effect on Mesocyclops leukarti with oxidants.
abstract: 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.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. mdjzjl@163.com
authors.forename: Jin-long
authors.initials: JL
authors.lastname: Zuo
authors.forename: Fu-yi
authors.initials: FY
authors.lastname: Cui
authors.forename: Tao
authors.initials: T
authors.lastname: Lin
mesh_terms: D033342:Copepoda / Q000187:drug effects* / Q000502:physiology*; D004305:Dose-Response Relationship, Drug; D005374:Filtration / Q000379:methods; D016877:Oxidants / Q000633:toxicity*; D015996:Survival Rate; D014873:Water Pollutants / Q000302:isolation & purification*; D014876:Water Pollution / Q000517:prevention & control*; D018508:Water Purification / Q000379:methods*
chemical_list: D016877:Oxidants; D014873:Water Pollutants