Study of removal effect on Mesocyclops leukarti with oxidants

• Published in: Journal of Zhejiang University. B. Science Vol. 7; no. 3; pp. 171 - 179
• Main Authors: Zuo, Jin-long, Cui, Fu-yi, Lin, Tao
• Format: Journal Article
• Language: English
• Published: China Springer Nature B.V 01.03.2006; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; Zhejiang University Press
• Subjects: Chlorine; Copepoda - drug effects; Copepoda - physiology; Cyclops; Dose-Response Relationship, Drug; Environmental Engineering; Filtration - methods; Mesocyclops leukarti; Oxidants - toxicity; Survival Rate; Water Pollutants - isolation & purification; Water Pollution - prevention & control; Water Purification - methods; 二氧化氯; 氧化剂; 水处理; 预氧化; Preoxidation; Mesocyclops leukarti; Oxidants; Water safety; Chlorine dioxide; Chlorine
• ISSN: 1673-1581; 1862-1783
• 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.