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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
Address:College of Life Sciences, Sichuan University, No.29, Wangjiang Road, Chengdu, Sichuan Province, 610064, China
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Your Position :Home->Past Journals Catalog->2012 Vol.31 No.5

Study on Incubation Effects of Copepoda Eggs Treated by Ozone and Chloride
Author of the article:TAN Lin, GONG Chen, WANG An-tai*, JIANG Wei
Author's Workplace:(Department of Life Science, Shenzhen University, Shenzhen, Guangdong Province 518060, China)
Key Words:ozone; chloride; copepoda; egg; hatching rate; drinking water
Abstract:

Copepoda were the intermediate host of a variety of human parasites, and waterworks commonly use ozone and chloride to eliminate them. This article explored the concentration effects on incubation of copepoda eggs, which were produced by ozone and chlorine in different pH value in water. The results indicated thatThe hatching rate of copepoda eggs in experimental groups (89.52%~ 97.85%) treated by ozone (1~ 6 mg/L) was significantly higher than that of control groups (76.19%), which showed that ozone had no significant inhibitory effects on the hatch of copepoda eggs; The hatching rate of copepoda eggs in experimental groups treated by chlorine (1~ 5 mg/L) was 66.67%~ 96.00%, 80% of which was higher than that of the control group (78%). It showed that chlorine had no significant inhibitory effects on the hatch of copepoda eggs; In partial acid or alkali water environment, the hatching rate was significantly decreased with the increasing concentration of chlorine; The inactivation rate of ozone and chlorine to copepoda adults exceeded 90%. Through analysis, that the copepoda eggs hatched after passing through carbon filters or sand filters of water purification was the main reason for repeated occurrence of the copepoda existing. Consequently, a twice-a-week technology (fortnightly) based on ozone and chlorine to control the copepoda existing was advised.

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