[Single and joint toxicity of perchloroethylene and cadmium on Ctenopharyngodon idellus].
In this paper, the single and joint toxicity of perchloroethylene (PCE) and cadmium (Cd) on grass carp (Ctenopharyngodon idellus) was observed by static test method, and the joint toxicity was evaluated by additive index method. The results showed that the LCs0 of PCE and Cd in 24, 48, 72 and 96 h was 49.12, 41.68, 36.37 and 34.30 mg x L(-1), and 45.58, 34.81, 28.63 and 24.05 mg x L(-1), respectively. Both the two test chemicals had high toxicity on C. idellus, and Cd had higher single toxicity than PCE. When the toxicity ratio was 1:1 and exposure time was 24, 48, 72 and 96 h, the LC50 of PCE and Cd was 24.63, 12.54, 9.88 and 7.08 mg x L(-1), and 17.11, 8.71, 6.87, 4.92 mg x L(-1), and the additive index (AI) was 0.14, 0.81, 0.95 and 1.43, respectively, indicating that the joint toxicity of PCE and Cd was synergistic, and increased with time. At the concentration ratio of 1:1, the LC50 of PCE and Cd in 24, 48, 72 and 96 h was 17.00, 11.81, 10.61 and 9.19 mg x L(-1), and 17.00, 11.81, 10.61 and 9.19 mg x L(-1), and the AI was 0.39, 0.70, 0.51 and 0.54, respectively, and the joint toxicity was also synergistic.
Wang
Gui-yan
GY
School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China. wangguiyan@yahoo.com.cn
Zhou
Qi-xing
QX
Hu
Xiao-min
XM
Hua
Tao
T
Li
Feng
F
D000818:Animals; D002104:Cadmium / Q000633:toxicity*; D002347:Carps / Q000502:physiology*; D004357:Drug Synergism; D007928:Lethal Dose 50; D013750:Tetrachloroethylene / Q000633:toxicity*; D014873:Water Pollutants / Q000633:toxicity
D014873:Water Pollutants; D002104:Cadmium; D013750:Tetrachloroethylene