期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 6, 期 2, 页码 145-151出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S1369-703X(00)00083-8
关键词
waste water; heavy metal; Zoogloea ramigera; Rhizopus arrhizus; the heat of biosorption; Langmuir model
The biosorption of Fe(III), Cr(VI), Pb(II), Cu(II) and Ni(II) ions on Zoogloea ramigera (activated sludge bacterium) and Rhizopus arrhizus (filamentous fungus) has been studied as a function of initial metal ion concentration and temperature. The applicability of the Langmuir model for each metal-microorganism system has been tested at different temperatures. The enthalpy change for the biosorption process has been evaluated by using the Langmuir constant b, related to the energy of adsorption. Thermodynamic parameters indicate the exothermic nature of Cu(II) and Ni(II) biosorption on both microorganisms. Fe(III), Cr(VI) and Pb(IT) biosorption is determined to be an endothermic process since increased binding occurs as the temperature is increased in the range 15-45 degrees C. (C) 2000 Elsevier Science S.A. All rights reserved.
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