Joint Toxicity of 1,4-Dichlorobenze and Cadmium on Ctenopharyngodon idellus
对二氯苯和镉对草鱼(Ctenopharyngodon idellus)的联合毒性效应研究

The pollution of 1,4-dichlorobenze and cadmium is increasingly concerned, but there is no report about joint toxicity of the two pollutants. The joint toxicity of 1,4-dichlorobenze and cadmium to grass carp (Ctenopharyngodon idellus) was examined using the static test method. The additive index method was used to evaluate the joint toxicity. The single toxic tests showed that LC50 of 24, 48, 72 and 96 h for 1,4-dichlorobenze to grass carp are 10.11, 9.04, 8.52 and 7.83 mg/L, respectively. Those for cadmium are 40.02, 35.05, 28.99 and 24.41 mg/L, respectively. So the single toxic sequence of 1,4-dichlorobenze and cadmium was 1,4-dichlorobenze > cadmium. The joint toxicity of 1,4-dichlorobenze and cadmium was synergistic while the toxicity was 1:1 at 24 h, 48 h, 72 h and 96 h. But the joint toxicity of 1,4-dichlorobenze and cadmium was antagonistic at 24 h, 48 h and 72 h, it was synergistic at 96 h while the concentration was 1:1.