Acute Toxicity of Mercury Chloride (Hgcl2) and Cadmium Chloride (Cdcl2) on the behavior of freshwater fish, Percocypris Pingi

Abstract

The present study was performed to examine acute toxicity of two water-borne metals (Hg and Cd) by static bioassays. Fingerlings Percocypris pingi (P. pingi) were exposed to a range of concentrations of heavy metals and the mortality rate were investigated after 24, 48, 72 and 96h. The median lethal concentration (LC 50) was determined with Probit analysis. The LC 50 values of mercury chloride for the P. pingi at 24, 48, 72 and 96h were 0.441, 0.347, 0.327 and 0.327 mg/L, respectively. But the LC 50 values of cadmium chloride at 24, 48, 72 and 96h were 2.551, 2.341, 1.207 and 0.081mg/L, respectively. The toxicity ranking of the two heavy metals was Hg>Cd. The safe concentration of Hg and Cd were 0.0327 and 0.0081mg/L, respectively.

Acute Toxicity of Zinc Sulfate Heptahydrate (ZnSO4*7H2O) and Copper (II) Sulfate Pentahydrate (CuSO4*5H2O) on Freshwater Fish, Percocypris pingi

“…The LC 50 96 h values of mercury chloride for the Percocypris pingi was 0.327 mg/L. But the LC 50 96 h value of cadmium chloride was 0.081 mg/L [17]. And in this study, the LC 50 96 h values of zinc for the Percocypris pingi was 2.852 mg/L.…”

“…Other studies reported that the heavy metals have a complex effect on the aquatic environment and this effect relies on the physicochemical characteristics of water and fish species [35,36]. And metal toxicity may be modified by physicochemical parameters for Percocypris pingi [17]. So we detected the physicochemical characteristics (e.g.…”

“…Reagent A was prepared by containing 5 g of phenol and 25 mg of potassium nitroprusside in 100 ml of deionized water. Reagent B was prepared by mixing 2 ml of NaClO and 2.5 g of NaOH in deionized water [17].…”