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5d内对50mg·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20-100mg·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50mg·L^-1，pH值为6．5-8．0时，真菌的生长量达到最大。
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.
出处
《泰山医学院学报》
CAS
2007年第6期437-440,共4页
Journal of Taishan Medical College
关键词
乐斯本
降解
真菌
生长量
chlorpyrifos
degradation
fungi
growth amount
