摘要
利用大肠杆菌JM109去除含铀废水,研究了在pH值、温度、吸附时间、铀离子的初始浓度、菌体浓度等,耐辐射奇球菌对铀的吸附效果.吸附试验结果表明耐辐射奇球菌有较高的吸附铀的能力,其中对低浓度的含铀废水处理潜力较大.当pH值为4.5时吸附效果最好,投加菌体浓度最佳为0.1 g/L,大约50 min左右达到吸附平衡,吸附量最高达到693.8 mg/g.吸附热力学研究其更符合Freundlich等温模型,吸附过程符合准二级动力学模型.
Escherichia coli JM109 was used to adsorpt the low concentration uranium from wastewater in this paper. Also the adsorption efficiencies for this bacterium to uranium un-der the different influencing factors （ such as：pH value,temperature,adsorption time,the initial concentration of uranium, cell concentration, etc. ） were studied. The experimental results showed that U was favorable to be adsorbed by Escherichia coli JM109,especially to wastewater in low concentration of uranium. Optimum biosorption was observed when the solution pH was 4. 5,the adsorbent dosage of 0. 1 g/L and the adsorption equilibrium was established in about 50 min,the high adsorption capacity of 693. 8 mg/g. Isotherm study shows that the Freundlich adsorption model is better,and the kinetic model of Escherichia coli JM109 can be described to the pseudo-second-order model.
出处
《南华大学学报（自然科学版）》
2014年第1期29-33,共5页
Journal of University of South China：Science and Technology
基金
湖南省教育厅基金资助项目(10C1142 2011-2013)
关键词
大肠杆菌JM109
吸附
铀
Escherichia coli JM109
adsorption
Uranium
作者简介
邓钦文（1981-），男，湖南衡阳人，南华大学环境保护与安全工程学院讲师，硕士．主要研究方向：环境工程，矿山环境修复．
