【摘要】 目的从污水排放口的污泥中分离获得能够降解乐斯本的真菌,并研究其降解特性。方法用紫外分光光度法和总量法测定了外加碳源浓度、初始pH值、乐斯本浓度对真菌的降解能力和生长量的影响。结果分离得到三株降解乐斯本的真菌,三株真菌5 d内对50 mg.L-1乐斯本的降解率分别高达93.53%、91.37%、83.45%。结论三株真菌均能以乐斯本为唯一碳源生长从而将其降解,且当乐斯本浓度为20~100 mg.L-1,pH值为6.5~9.0时,真菌的降解效果较好;当乐斯本浓度为50 mg.L-1,pH值为6.5~8.0时,真菌的生长量达到最大。更多还原

【Abstract】 Objective: To obtain the chlorpyrifos-degrading fungi isolated from sludge at sewage outlet by enrichment and study the degradation characteristics of the fungi.Methods: The effects of carbon source,pH,chlorpyrifos concentration on the ability of degradation and the fungi growth amount were determined by ultraviolet spectrophotometry and gravimetric method.Results: Three chlorpyrifos-degrading fungi were isolated,the degradation rates of chlorpyrifos with concentration of 50mg·L-1 by these fungi were 93.53%,91.37% and 83.45% in 5 days respectively.Conclusion: These three fungi,with chlorpyrifos as sole carbon source,can degrade chlorpyrifos.The biodegradation rates arre higher when chlorpyrifos concentration is 20~100mg·L-1,pH is 6.5~9.0.The growth amount of the fungi is the highest when chlorpyrifos concentration is 50mg·L-1,pH is 6.5~8.0.更多还原