双酚A和对硝基酚对泥鳅的急性毒性效应

采用单因子急性毒性试验法及组织切片法,检测了双酚A(bisphenol A,BPA)和对硝基酚(p-nitrophenol,P-NP)对泥鳅(Misgurnus anguillicadatus)的急性毒性效应以及对鳃组织结构的破坏,统计了半数致死浓度(median lethal concentration,LC_(50))和安全浓度(safe concentration,SC).结果表明:BPA对泥鳅24 h、48 h、72 h、96 h LC_(50)分别为8.32、8.02、6.97、6.43 mg·L~(-1),SC为2.24 mg·L~(-1);P-NP对泥鳅24 h、48 h、72 h、96 h LC_(50)分别为19.14、17.58、16.98、14.69 mg·L~(-1),SC为4.40 mg·L~(-1);HE染色结果显示,两种化学物质高浓度处理均使鳃小叶细胞脱落,鳃小叶变细;BPA与p-NP均为高毒性污染物,BPA比P-NP毒性更大.对泥鳅的毒性作用是随着体内积累浓度的增加、作用时间的延长而增强,并可造成鳃组织的严重受损.

Abstract：

By the methods of single factor toxicity test and histological observation, this paper studied the acute toxicity of bisphenol A (BPA) and p-nitrophenol (p-NP) to Misgurnus anguilli-cadatus and the histological changes of M. Anguillicadatus gill. The median lethal concentration (LC_(50)) and safe concentration (SC) were calculated. The LC_(50) of BPA for 24, 48, 72, and 96hours were 8. 32, .8. 02, 6. 97 and 6. 43 mg·L~(-1), respectively, and the SC was 2. 24 mg·L~(-1);while the mean LCw values of p-NP for 24, 48, 72, and 96 hours were 19. 14, 17. 58, 16. 98, and14. 69 mg·L~(-1), respectively, and the SC was 4. 40 mg·L~(-1). After exposed to BPA and p-NP,the ceils of branchial leaflets fell off, and the branchial leaflets became thin. Both BPA and p-Nphad high toxicity to M. Anguillicadatus, and BPA had higher toxicity than p-NP. With the increas-ing concentration and exposure time of BPA and p-NP, their toxicity effects to M. Anguillicadatus increased, and the damage on gill of M. Anguillicadatus was more severe.

Acute toxicity effects of bisphenol A and p-nitrophenol to Misgurnus anguillicadatus

By the methods of single factor toxicity test and histological observation, this paper studied the acute toxicity of bisphenol A (BPA) and p-nitrophenol (p-NP) to Misgurnus anguilli-cadatus and the histological changes of M. Anguillicadatus gill. The median lethal concentration (LC_(50)) and safe concentration (SC) were calculated. The LC_(50) of BPA for 24, 48, 72, and 96hours were 8. 32, .8. 02, 6. 97 and 6. 43 mg·L~(-1), respectively, and the SC was 2. 24 mg·L~(-1);while the mean LCw values of p-NP for 24, 48, 72, and 96 hours were 19. 14, 17. 58, 16. 98, and14. 69 mg·L~(-1), respectively, and the SC was 4. 40 mg·L~(-1). After exposed to BPA and p-NP,the ceils of branchial leaflets fell off, and the branchial leaflets became thin. Both BPA and p-Nphad high toxicity to M. Anguillicadatus, and BPA had higher toxicity than p-NP. With the increas-ing concentration and exposure time of BPA and p-NP, their toxicity effects to M. Anguillicadatus increased, and the damage on gill of M. Anguillicadatus was more severe.