Biosorption characteristics of Aspergillus flavus biomass for removal of Pb(II) and Cu(II) ions from an aqueous solution
Biosorption characteristics of Aspergillus flavus biomass for removal of Pb(II) and Cu(II) ions from an aqueous solution
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DOI：
10.1016/j.biortech.2005.09.009
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发表时间：
2006-10-01
影响因子：
11.4
通讯作者：
Tunali, Sibel
中科院分区：
文献类型：
--
作者：
Akar, Tamer;Tunali, Sibel
研究了黄曲霉真菌生物量对Pb（II）和Cu（II）的生物吸附特性与初始pH、接触时间和初始金属离子浓度的关系。在研究预处理生物吸附剂的性能之前，使用热灭活（杀死）生物质来确定最佳条件。在pH 5.0 +/- 0.1条件下，平衡时间为2 h， Pb（II）的最大吸附值为13.46 +/- 0.99 mg/g, Cu（II）的最大吸附值为10.82 +/- 1.46 mg/g。与热灭活生物质相比，去垢剂、氢氧化钠和二甲亚砜预处理提高了生物质的生物吸附能力。在最佳条件下获得的生物吸附数据用Freundlich等温线模型很好地描述了。还研究了生物对Pb(H)和Cu（II）离子的竞争性吸附，以确定生物质的选择性。结果表明，黄曲霉是去除水中Pb（II）和Cu（II）离子的较好的生物吸附剂。(c) 2005 Elsevier Ltd版权所有。
The Pb(II) and Cu(II) biosorption characteristics of Aspergillus flavus fungal biomass were examined as a function of initial pH, contact time and initial metal ion concentration. Heat inactivated (killed) biomass was used in the determination of optimum conditions before investigating the performance of pretreated biosorbent. The maximum biosorption values were found to be 13.46 +/- 0.99 mg/g for Pb(II) and 10.82 +/- 1.46 mg/g for Cu(II) at pH 5.0 +/- 0.1 with an equilibrium time of 2 h. Detergent, sodium hydroxide and dimethyl sulfoxide pretreatments enhanced the biosorption capacity of biomass in comparison with the heat inactivated biomass. The biosorption data obtained under the optimum conditions were well described by the Freundlich isotherm model. Competitive biosorption of Pb(H) and Cu(II) ions was also investigated to determine the selectivity of the biomass. The results indicated that A. flavus is a suitable biosorbent for the removal of Pb(II) and Cu(II) ions from aqueous solution. (c) 2005 Elsevier Ltd. All rights reserved.