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Sorption of Na+, Ca2+ ions from aqueous solution onto unbleached kraft fibers—kinetics and equilibrium studies by Tuan D. Duong; Manh Hoang; Kien L. Nguyen is a Chemistry article available to read on EtoBox.

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The sorption of Na + and Ca 2+ from aqueous solutions onto unbleached kraft fiber was investigated. The sorption kinetics was found to be highly dependent on pH, initial concentration, and temperature. The sorption rate increased as the initial concentration and pH were increased. Thermodynamic and kinetic results indicated that the sorption of Na + and Ca 2+ onto kraft fiber was exothermic, reversible, and spontaneous with activation energies of 11.0 and 23.3 kJ/mol, respectively. The sorption kinetics followed a pseudo-second-order model and the equilibrium data followed the Langmuir isotherms. The fiber sorption capacities calculated from the Langmuir isotherms were similar to the fiber charges determined by potentiometric titration at pH > 7.

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Author

Tuan D. Duong; Manh Hoang; Kien L. Nguyen

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)