Zinc biosorption on Tectona grandis L.f. leaves biomass: Equilibrium and kinetic studies
| Autor: | Y. Prasanna Kumar, P. King, V.S.R.K. Prasad |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Langmuir
Chromatography Aqueous solution Exothermic process General Chemical Engineering Biosorption Langmuir adsorption model chemistry.chemical_element General Chemistry Zinc Industrial and Manufacturing Engineering symbols.namesake Adsorption chemistry symbols Environmental Chemistry Freundlich equation Nuclear chemistry |
| Zdroj: | Chemical Engineering Journal. 124:63-70 |
| ISSN: | 1385-8947 |
| Popis: | The biosorption of zinc ions from aqueous solution by Tectona grandis L.f. was studied in a batch adsorption system as a function of pH, contact time, zinc ion concentration, adsorbent concentration and adsorbent size. The biosorption capacities and rates of zinc ions onto T. grandis L.f. were evaluated. The Langmuir, Freundlich, Redlich–Peterson and Temkin adsorption models were applied to describe the isotherms and isotherm constants. Biosorption isothermal data could be well interpreted by the Langmuir model followed by Temkin model with maximum adsorption capacity of 16.42 mg g −1 of zinc ion on T. grandis L.f. leaves biomass. The kinetic experimental data was properly correlated with the second-order kinetic model. Various thermodynamic parameters such as Δ G °, Δ H °, and Δ S ° were calculated indicating that this system was a spontaneous and exothermic process. |
| Databáze: | OpenAIRE |
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