Study on Bioconcentration of Three Chlorophenols in Zebrafish and SOD Activity Stress Action

To study the physio-toxicity effect of 4-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorphenol on zebrafish, the evaluation indicator of 7 d K_BCF and SOD activity with different exposure concentrations were determined using zebrafish by semi-static test. The results showed that the 7 d K_BCF of 4-CP, 2,4-DCP and 2,4,6-TCP to zebrafish were 33.65±5.29,65.54±10.49 and 128.05±39.83, respectively, and the bioconcentration factor followed the order of 4-CP＜2,4-DCP＜2,4,6-TCP. The bioconcentration of the chlorophenols to zebrafish and the numbers of chloro derivatives had positive correlation. The results of stress action test of the chlorophenols to zebrafish showed that the effect at 1 d was induction-inhibition and at 7 d the effect was inhibition, indicating significant variation of SOD activity.