Removal of heavy metals Cd (II), Cu (II) and Zn (II) biosorption process by using the macrophyte Eicchornia crassipes

被引：11
作者：
Modenes, Aparecido Nivaldo
Espinoza-Quinones, Fernando Rodolfo
Lavarda, Fabio Luciano
Colombo, Andreia
Borba, Carlos Eduardo
Leichtweis, Wilian Adriel
Mora, Nora Diaz
机构：
来源：
REM-REVISTA ESCOLA DE MINAS | 2013年 / 66卷 / 03期
关键词：
Biosorption; Eicchornia crassipes; heavy metals; CADMIUM BIOSORPTION; COPPER(II) IONS; EQUILIBRIUM; ADSORPTION; ZINC; SORPTION; ISOTHERMS; BIOMASS;
D O I：
10.1590/S0370-44672013000300013
中图分类号：
学科分类号：
摘要：
The adsorption capacity of Eicchornia crassipes for removing Cd(II), Cu(II) and Zn(II) ions from aqueous solutions has been investigated in a batch system. Experimental data of the kinetics and equilibrium of biosorption for the single-component systems was obtained. Equilibrium times of 45, 60 and 120 min. for Cd(II), Cu(II) and Zn(II) ions, respectively, were achieved. Kinetic data was better fitted to the pseudo-second order kinetic model. To describe biossorption equilibrium were used Langmuir, Freundlich and Temkim isotherms. The Langmuir isotherm model was better fitted to the equilibrium data, with values of 0.667, 0.615 and 0.633 mequiv.g(-1) for Cd(II), Cu(II) and Zn(II) adsorption capacity, respectively. E. crassipes biomass has great potential to be used in wastewater treatment systems.
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页码：355 / 362
页数：8
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