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- W2391119316 abstract "Adsorption equilibrium, Kinetics and thermodynamics of chromium(VI) ions onto carbonate hydroxylapatite(CHAP) synthesized by using waste eggshell as raw material were studied in a batch system with respect to temperature and pH and contact time.The results showed that the removal efficiency of chromium(VI) by CHAP could reach 98.3%, when the initial chromium(VI) concentration 50mg/L and the liquid/solid ratio was 5g/L and pH was 3.0 and adsorption period is 60min at room temperatures.The equilibrium sorption data for single metal systems at room temperature could be described by the Langmuir and Freundlich isotherm models.The second-order kinetic model provided the better correlation of the used experimental data compared to the first-order kinetic model.The paper discussed the thermodynamic parameters of the adsorption(the Gibbs free energy, entropy and enthalpy) at different temperatures.The results demonstrated that the adsorption process was spontaneous and endothermic." @default.
- W2391119316 created "2016-06-24" @default.
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- W2391119316 date "2009-01-01" @default.
- W2391119316 modified "2023-09-25" @default.
- W2391119316 title "STUDY ON KINETICS AND THERMODYNAMICS FOR REMOVAL OF CHROMIUM(VI) FROM AQUEOUS SOLUTION BY CARBONATE HYDROXYAPATITE" @default.
- W2391119316 hasPublicationYear "2009" @default.
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