کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
585731 1453187 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Equilibrium and thermodynamic parameters of single and binary mixture biosorption of lead (II) and copper (II) ions onto Pseudomonas putida: Effect of temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Equilibrium and thermodynamic parameters of single and binary mixture biosorption of lead (II) and copper (II) ions onto Pseudomonas putida: Effect of temperature
چکیده انگلیسی

The biosorption of lead (II) and copper (II) ions, single component and binary systems, by dried P. putida was investigated in a batch system. The effects of initial pH, temperature, initial single and binary mixture concentrations on the biosorption kinetics and equilibrium uptake of each component, both single and binary mixtures were investigated. The bacterial biomass exhibited the highest single and binary lead (II) and copper (II) ions uptake capacity at 25 and 30 °C, respectively, the initial pH value of 5.5 and at the initial metal ions concentration of 100 mg dm−3. The Freundlich and Langmuir adsorption models were used for the mathematical description of the biosorption equilibrium and isotherm constants were evaluated at different temperatures. Adsorption data were well described by the Langmuir model, although they could be modeled by the Freundlich equation. The thermodynamics constants of the adsorption process: ΔH°, ΔS° and ΔG° were evaluated. The results showed that biosorption of single and binary lead (II) ions on P. putida were exothermic and spontaneous. While biosorption of single and binary copper (II) ions on P. putida was endothermic and spontaneous.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 135, Issues 1–3, 31 July 2006, Pages 87–93
نویسندگان
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