摘要
利用实验室已经筛选到的阿特拉津降解菌株Arthrobacter sp.FM326为研究材料,研究了该降解菌在不同含水率(5%、15%、25%)的土壤和不同的水样中(农药厂排污水水样、晋宁蔬菜地沟渠水样、盘龙江水样)对阿特拉津的降解。实验结果表明,培养3d后,菌株FM326显著促进了污染土壤中阿特拉津的降解(降解效率可达95%)。土壤含水率较低时,土壤中阿特拉津的降解作用主要靠微生物的作用。随着土壤含水率的增加,土壤中阿特拉津的物理化学降解作用增强,但仍以生物降解作用为主。培养5d后,与对照相比,菌株FM326在3种水样中对阿特拉津均有显著的降解作用,其降解效率由大到小的顺序为:农药厂排污水水样(98%)>晋宁蔬菜地沟渠水样(91%)>盘龙江水样(86%)。
Arthrobacter sp. FM326 is a bacterial strain which was previously screened out as an atrazine degrading bacterium. In the present study,the atrazine degradations were conducted by the bacteria in soils at different moistures such as 5%,15%,25% and water samples including sewage from a pesticide plant,drainage water from a vegetable farmland in Jinning County, and water from Panlong River. Results showed that incubating Arthrobacter sp. FM326 significantly promoted the atrazine degradation in the atrazine polluted soils. The rate of atrazine degradation reached 95 % after 3 days.The atrazine degradation in soil was mainly dependent on microorganisms when the soil moisture was low. Although the physical and chemical degradation on atrazine in soils were increased as the soil water content increased,biodegradation still was the main way. Compared with the control,Arthrobacter sp. FM326 significantly degraded atrazine in the three tested waters after cultured for 5 days. The degradation rate was 98% for sewage from a pesticide plant,91% for drainage water from a vegetable farmland in Jinning County and 86% for water from Panlong River.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2016年第3期85-90,共6页
Environmental Science & Technology
基金
云南省自然科学基金项目(2010CD058)
云南省教育厅科学研究基金项目(2010Y339)
