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- W14883971 abstract "Aim of this study is the determination of the Cr(VI) removal efficiency of treated pine sawdust and also to find out the thermodynamic and kinetic parameters of Cr(VI) removal process in batch systems. Sawdust has been treated with 1,5-disodium hydrogen phosphate before the adsorption experiments. The effects of initial concentration of Cr(VI) ion, temperature, amount of adsorbent and pH of the solution on adsorption have been investigated. Optimum conditions for adsorption were determined as T = 40 °C, sawdust dose = 4 g, pH 2, by using the results of these experiments and an additional set of experiments was performed under these optimum conditions in order to see the change in the adsorption efficiency. Removal of chromium ion was found as highly dependent on pH and initial Cr(VI) concentration of the solution. In order to find out thermodynamic and kinetic parameters equilibrium adsorption models were applied. Although experimental data confirm with both Langmuir and Freundlich isotherm models, they suit most on Langmuir isotherms. Adsorption rate constant was determined from Lagergren equation. Equilibrium constants, adsorption free energy, enthalpy and entropy change values were also determined. It was found that adsorption process follows first order kinetic and adsorption of Cr(VI) on sawdust has the spontaneous nature." @default.
- W14883971 created "2016-06-24" @default.
- W14883971 creator A5030905347 @default.
- W14883971 creator A5035706570 @default.
- W14883971 date "2007-10-01" @default.
- W14883971 modified "2023-10-05" @default.
- W14883971 title "Removal of Cr(VI) from industrial wastewaters by adsorption" @default.
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- W14883971 doi "https://doi.org/10.1016/j.jhazmat.2007.04.019" @default.
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