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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, a strain of atrazine that has been screened by the laboratory, was used as material to study the effect of degrading bacteria on soil and different water samples with different moisture content (5%, 15%, 25%) (pesticide Plant effluent water samples, Jinning vegetable ditch water samples, Panlong River water samples) of atrazine degradation. The experimental results showed that the strain FM326 significantly promoted the degradation of atrazine in the contaminated soil (the degradation efficiency was up to 95%) after 3 days. When the soil moisture content is low, the degradation of atrazine in the soil relies mainly on the action of microorganisms. With the increase of soil water content, the physico-chemical degradation of atrazine in soil is enhanced, but it is still dominated by biodegradation. After cultured for 5 days, compared with the control, strain FM326 had significant degradation of atrazine in all three water samples. The order of degradation efficiency of the strain FM326 was 98% > Jinning vegetable ditches water samples (91%)> Panlongjiang water samples (86%).