Determination of Thermodynamic Parameters of Zinc (II) Adsorpton on Pulp Waste as Biosorbent

Abstract:

Dried pulp waste, a manufactured solid waste by product was used as a biosorbent for the removal zinc (II) from aqueous solution. A series of experiments were conducted in a batch system to evaluate the thermodynamic parameters of the pulp waste for zinc (II) removal at an initial pH value of 6.0, ZnCl₂ concentration of 50-200 ppm and temperature 30-50 °C. Thermodynamic parameters, such as Gibbs free energy change (ΔG°), enthalpy (ΔH°) and entropy (ΔS°), evaluation of zinc (II) adsorption on pulp waste showed that the adsorption process under the selected conditions was spontaneous and endothermic nature for all concentration and temperature studied. The activation energy of zinc (II) adsorption (E_a) was determined using modified Arrhenius equation as 1.89, 3.76, 4.73 and 6.46 kJ/mol at different concentration 50, 100, 150 and 200 ppm, respectively. The sticking probability (SP*) was also evaluated.

• Periodical: Advanced Materials Research (Volumes 931-932)
• Pages: 215-219
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.931-932.215
• Online since: May 2014
• Authors: Panida Charnkeitkong*, Pisit Charnkeitkong, Xian She Feng
• Keywords: Adsorption, Enthalpy, Entropy, Gibbs Free Energy, Pulp Waste, Zinc

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