| 蜡状芽孢杆菌Bacillus cereus吸附铅的研究 |
| 摘要点击 2406 全文点击 1843 投稿时间：2003-03-27 修订日期：2003-05-20 |
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| 中文关键词 蜡状芽孢杆菌 生物吸附 铅 |
| 英文关键词 Bacillus cereus biosorption lead |
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| 中文摘要 |
| 通过吸附实验和微量滴定法探讨了Pb2+与蜡状芽孢杆菌Bacillus cereus的吸附特性.结果表明,该菌体对Pb2+的吸附量随着pH升高而升高,最适pH值为6;菌体浓度的增加有利于对Pb2+的吸附;整个吸附过程符合Langmuir吸附模型,在试验的条件下,对Pb2+的饱和吸附容量为36.7mg/g干菌体.通过电位滴定实验,使用实时格氏图确定了滴定体系中的等当点(Ve)以及估算了表面活性位的总浓度(HS).
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| 英文摘要 |
| In this paper, the potentiometric titration and the sorption experiments were applied to investigate the biosorption behavior of Pb2+ on Bacillus cereus biomass. It was shown that the biosorption capacities increased with increasing pH from 3 to 7, and the higher concentration of the biomass in solution was favorable to the sorption of Pb2+. Langmuir model simulated the adsorption data of Pb2+ ion very well, and the saturated sorption capacity for Pb2+ ion achieved 36 7mg·g-1 dry biomass. According to the result of the potentiometric titration, the Gran plots for the hydroxide back titration of biomass suspension systems were utilized to derive the specific volume of titrant at the equivalence point (Ce), furthermore, the total surface site concentration was calculated. |
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