Kinetics and Thermodynamics of Cd(II) Sorption onto Sodium Alginate/Poly(Vinyl Alcohol)/Hydroxyapatite Composite Fiber

Abstract:

In this paper, the sodium alginate (SA)/poly (vinylalcohol)(PVA)/hydroxyapatite (HAp) fiber was prepared via solution spinning. The adsorption properties of SA/PVA/HAp composite fiber were studied,and the adsorption kinetics and isotherms were investigated. The experimental results showed that the adsorption process was fast, in which half-equilibrium and equilibrium was obtained in 5 and 30 minutes, respectively. The pseudo-second-order kinetic model provided a better correlation of the experimental results. Both of Langmuir isotherm and Freundlich isotherm could describe the adsorption behavior of SA/PVA/HAp composite fiber towards cadmium. The positive H° value and increased absolute value of the G° with temperature indicate that high temperature is good to the adsorption process.

• Periodical: Materials Science Forum (Volumes 743-744)
• Pages: 480-485
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.743-744.480
• Online since: January 2013
• Authors: Zi Ze Yang, Wang Xiao, Chun Ma, Li Hua Lv, Chun Yan Wei, Byung Gil Min
• Keywords: Adsorption Kinetics, Hydroxyapatite (HAP), Poly(vinyl alcohol), Sodium Alginate, Thermodynamic

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