| 小球藻对Pb~(2+)的吸附及生物吸附机理初探 |
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| 引用本文： | 李英敏,杨海波,吕福荣,张欣华,刘艳,于媛.小球藻对Pb~(2+)的吸附及生物吸附机理初探[J].农业环境科学学报,2004,23(4):696-699. |
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| 作者姓名： | 李英敏 杨海波 吕福荣 张欣华 刘艳 于媛 |
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| 作者单位： | 大连大学化学与化学工程系,辽宁,大连,116622 |
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| 基金项目： | 辽宁省博士启动基金资助项目的部分内容(001059) |
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| 摘 要： | 以小球藻作为生物吸附剂，对废水中Pb^2 的吸附进行了研究。研究表明，小球藻对Pb^2 的吸附经历了快速的表面吸附和缓慢的吸收2个步骤；吸附液适宜的pH为7左右；且小球藻死体比新鲜藻液对Pb^2 的吸附作用要强；吸附液离子强度的增强会降低小球藻对Pb^2 的吸附作用；适当强度的光照有利于小球藻对Pb^2 的吸附；吸附符合Freundlich等温方程。
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| 关 键 词： | 小球藻 吸附 Pb^2＋ |
| 文章编号： | 1672-2043(2004)04-0696-04 |
| 修稿时间： | 2004年1月6日 |
Sorption of Pb2 + by Chlorella Vulgaris and Biosorption Mechanism |
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| Abstract: | Biosorption of heavy metal is an effective technology for the trea tm ent of industrial wastewater. The sorption and biosorption mechanism of Pb2 by Chlorella vulgaris were studied to examine the possibility of metal bioaccumulat ion. The sorption profiles at various conditions including the effects of time, initial pH of solution, the state of Chlorella vulgaris, ionic strength and temp eratures were obtained. The results showed that the kinetics of sorption was rel atively fast, the sorption of Pb2 by Chlorella vulgaris involved two steps: rap id surface sorption and slow sorption. The initial pH of solution was the import ant factor affecting biosorption and the suitable pH was around 7. Dead cells co uld accumulate more Pb2 than fresh cells. The study also proved that ionic stren gth had inhibition effect on the sorption of Pb2 by Chlorella vulgaris, Pb2 bi oaccumulation benefited from the increasing of light intensity. It was found tha t the metal concentration sorbed by alga in solution at equilibrium obeyed the F reundlich equation very well, suggesting involvement of a multiplicity of mechan isms and sorption sites. This study implied the feasibility of large-scale appl ication for the treatment of Pb2 bearing industrial wastewater by the absorbent from Chlorella vulgaris. |
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| Keywords: | Chlorella vulgari sorption Pb2 |
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