Effect of water hardness on the toxicity of cobalt and nickel to a freshwater fish, Capoeta fusca.
- Author:
Alireza POURKHABBAZ
1
;
Tahereh KHAZAEI
;
Samira BEHRAVESH
;
Mohammad EBRAHIMPOUR
;
Hamidreza POURKHABBAZ
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Calcium Carbonate; analysis; Cobalt; analysis; toxicity; Cyprinidae; growth & development; Environmental Monitoring; Fresh Water; analysis; Iran; Lethal Dose 50; Nickel; analysis; toxicity; Toxicity Tests, Acute; Water Pollutants, Chemical; analysis; toxicity
- From: Biomedical and Environmental Sciences 2011;24(6):656-660
- CountryChina
- Language:English
-
Abstract:
OBJECTIVETo determine the effects of water hardness on the toxicities of cobalt (Co) and nickel (Ni) to a freshwater fish, Capoeta fusca.
METHODSToxicity was investigated by static bioassay. Fish were exposed to cobalt (as CoCl(2)) and nickel (as NiCl(2)) for 96 h in waters with two levels of hardness ("hard" and "very hard", nominally 130 mg/L and 350 mg/L as CaCO(3), respectively).
RESULTSWater hardness had a significant effect on the acute toxicity of both elements. The 96 h LC(50) values for Co were 91.7 mg/L and 204.8 mg/L in hard and very hard waters, respectively, and for Ni the 96 h LC(50) values were 78.0 mg/L and 127.2 mg/L, respectively.
CONCLUSIONThe fish were more sensitive to Co and Ni toxicity in hard water than in very hard water; very hard water protects C. fusca against the toxicity of Co and Ni.
