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Recovery of gold(III) from an aqueous solution onto a durio zibethinus husk

Zainal Abidin, Mahani A. and Abdul Jalil, Aishah and Triwahyono, Sugeng and Adam, S. Hazirah and Kamarudin, N. H. Nazirah (2011) Recovery of gold(III) from an aqueous solution onto a durio zibethinus husk. Biochemical Engineering Journal, 54 (2). pp. 124-131. ISSN 1369-703X

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Official URL: http://dx.doi.org/10.1016/j.bej.2011.02.010


The recovery of gold(III) ions from an aqueous solution onto a durio zibethinus husk (DZH) was examined after varying pH, contact time, adsorbent dosage, initial Au(III) concentration, and temperature. The functional groups of DZH were analyzed by FTIR and Au(III) recovery onto DZH was verified by FESEM–EDX and XRD analysis. Adsorption equilibrium isotherms and kinetics of the DZH were studied using Freundlich and Langmuir models, as well as pseudo first-order, second-order kinetic and intraparticle diffusion equations. The experimental data obtained with DZH fitted best to the Langmuir isotherm model and exhibited a maximum adsorption capacity (qmax) of 1724 µmol g-1. The data followed the pseudo second-order equation. The activation energy of the adsorption (Ea) was estimated to be 38.5 kJ mol-1. Thermodynamic parameters, such as changes in enthalpy, entropy and Gibbs free energy, showed that the adsorption is exothermic, spontaneous at low temperature, and is a chemisorption process. These results indicate that DZH adsorbs efficiently and could be used as a low-cost alternative for the adsorption of Au(III) in wastewater treatment.

Item Type:Article
Uncontrolled Keywords:recovery, gold(III), durio zibethinus husk
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Chemical Engineering
ID Code:29408
Deposited By: Yanti Mohd Shah
Deposited On:19 Mar 2013 08:09
Last Modified:26 Mar 2019 08:07

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