| 2,4-二硝基甲苯与共存硝基芳烃化合物对斜生栅列藻的联合毒性 |
| 摘要点击 2037 全文点击 2567 投稿时间：1997-01-27 |
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| 中文关键词 2 4－二硝基甲苯 硝基芳烃化合物 联合毒性 斜生栅列藻 协同作用 拮抗作用 |
| 英文关键词 mixtoxicity 2,4-DNT nitroaromatic compounds algae Scenedesmus obliquus |
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| 中文摘要 |
| 为了客观地评价2,4-二硝基甲苯与其它硝基芳烃化合物共存时对藻类的生态毒理学效应,采用OECD藻类生长抑制实验的国际标准方法,研究了2,4-二硝基甲苯与其它6种硝基芳烃化合物共存时,对斜生栅列藻(Scenedesmus obliquus)的联合毒性(48h EC50),同时观察到细胞水平上的中毒症状。结果表明:2,4-二硝基甲苯加对硝基苯胺;2,4-二硝基甲苯加对二硝基苯;2,4-二硝基甲苯加对硝基苯甲醚均表现为协同作用。2,4-二硝基甲苯加对硝基苯酚;2,4-二硝基甲苯加对硝基甲苯;2,4-二硝基甲苯加对硝基氯苯均表现为拮抗作用。细胞水平中毒症状:似亲孢子释放受阻;异形巨细胞出现;细胞核和细胞器解体,原生质解体。通过对中毒症状和毒物浓度相互关系的分析,初步探讨了2,4-二硝基甲苯与其它共存硝基芳烃化合物对斜生栅列藻的联合毒性机制。 |
| 英文摘要 |
| In order to evaluate objectively the ecological effects of 2,4-DNT mixed with 6 kinds of nitroaromatic compounds in the ecosystem,the study on the mixtoxicity of 2,4-DNT and other 6 kinds of nitroaromatics to the algae(Scenedesmus obliquus)was carried out.48h EC50of monotoxicity of 7 kinds of compunds and 48h EC50.of mixtoxicity of 2,4-DNT+6 kinds of compounds were measured. Results indicated that there are synergisms between,2,4-DNT+4-NAn,2,4-DNT+4-NAnis, and 2,4-DNT+1,4-DNB as well as antagonisms between 2,4-DNT+4-NT,2,4-DNT+4-NPh and 2,4-DNT+4-NCB. Under the microscope(400 times)3 kinds of toxic symptoms,the inhibition to the filial spores forming and releasing, the irregular big cells appearing,nucleus and cell organs as well as the protoplast distegrating were observed. |
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