Biosorption of copper(II) ions from aqua solutions using dried yeast biomass

被引:77
作者
Cojocaru, Corneliu [1 ]
Diaconu, Mariana [1 ]
Cretescu, Igor [1 ]
Savic, Jasmina [2 ]
Vasic, Vesna [2 ]
机构
[1] Tech Univ Iasi, Dept Environm Engn & Management, Iasi 700050, Romania
[2] Vinca Inst Nucl Sci, Dept Phys Chem, Belgrade 11001, Serbia
关键词
Biosorption; Adsorption isotherm; Heavy metals; Response surface methodology (RSM); WASTE BEER YEAST; SACCHAROMYCES-CEREVISIAE; BAKERS-YEAST; AQUEOUS-SOLUTIONS; METAL-IONS; TRACE ENRICHMENT; HEAVY-METALS; LEAD IONS; SORPTION; REMOVAL;
D O I
10.1016/j.colsurfa.2008.11.003
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The ability of dried yeast Saccharomyces biomass to remove Cu(II) ions from aqueous solutions was investigated by using of batch techniques. The influence of different parameters on copper uptake by dried yeast, such as initial Cu(II) concentration, initial pH of solution and temperature, was studied. The Freundlich, Langmuir, Redlich-Peterson and Sips isotherms were applied to the obtained experimental data. According to Langmuir isotherm the maximum adsorption capacity of investigated non-living biomass was found to be 2.59 mg/g. The thermodynamic parameters (e.g. free energy and enthalpy) were calculated and discussed. The adsorption of Cu(II) onto the dried cells of Saccharomyces cerevisiae is an endothermic process and become more favorable with the increasing of temperature in pH range from 3 to 4. Optimization studies by means of response surface methodology were carried out, which resulted in improvement of the efficiency of sorption removal by using of biomass. The removal efficiency of real wastewater originating from electroplating industry which contains Sn(II) ions was determined and compared with synthetic wastewater obtained in laboratory. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:181 / 188
页数:8
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