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OALib Journal期刊
ISSN: 2333-9721
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重金属铜离子抗性菌株的筛选和吸附性能
DOI: 10.3724/SP.J.1145.2012.00964, PP. 964-970
Keywords: 重金属污染,cu2+,生物吸附,吸附动力学,langmuir模型
Abstract:
从四川红原地区土壤中分离纯化得到对重金属铜离子（cu2+）具有良好抗性的菌株ys-22，经16srdna序列比对鉴定该菌为克雷伯氏菌属（klebsiella）中的产酸克雷伯氏菌（k.oxytoca）.利用该菌进行生物吸附研究，结果显示其对水体中的重金属cu2+具有良好的吸附性能，吸附行为能很好地符合pseudo二级动力学模型和langmuir等温吸附模型，不同的培养条件以及菌体所处的不同生长时期会影响菌体的吸附效果，pgy培养基培养达到生长指数期时菌体用于吸附效果最好.最佳吸附ph值为5.30，吸附迅速，约60min即可达到吸附平衡，最大单位吸附量达到117.6mgg-1干重菌体.研究表明该菌株作为一种生物吸附剂用于去除废水中的重金属铜污染具有一定的实际应用价值.图7表3参27
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