从农药厂废水处理池的活性污泥中分离到一株阿特拉津降解茵X-4,根据其生理生化特性和16S rRNA基因序列相似性分析,将其初步鉴定为节杆菌属(Arthrobacter sp.).该茵能以阿特拉津为唯一碳氮源生长,42 h内对100 mg/L的阿特拉津降解效果为95.7%,降解阿特拉津的最适温度为30℃,pH为7.0.该菌对多种重金属离子都存在抗性,显示了其在去除阿特拉津和重金属复合污染方面的应用潜力.对其降解基因的初步研究显示,该菌含有trzN、atzB和atzC 3个阿特拉津降解相关基因.%A bacteria strain X-4 capable of degrading atrazine was isolated from the activated sludge from the wastewater treating system of an atrazme manufacturer. It was preliminarily identified as Arthrobacter sp. according to its physiological & biochemical characteristics and the analysis of its 16S rRNA gene sequence. This strain could use atrazine as sole carbon and nitrogen source, and degrade 95.7％ of 100 mg/L atrazine within 42 h. The optimal pH and temperature for the degradation were 30 ℃ and pH 7.0, respectively. Strain X-4 could tolerate many kinds of heavy metals, which showed its potential in treating the co-contamination of atrazine and heavy metals. The atrazine-degrading related genes of strain X-4 were the combination of trzN, atzB and atzC.
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