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

Paper ID Volume ID Publish Year Pages File Format Full-Text
3783 188 2011 8 PDF Available
Title
Recovery of gold(III) from an aqueous solution onto a durio zibethinus husk
Abstract

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.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Durio zibethinus husk (DZH) as an alternative low-cost adsorbent for recovery of gold(III) ion. ► Adsorption fitted well to Langmuir isotherm and followed pseudo second-order kinetic equation. ► Adsorption was exothermic and chemisorptions process. ► DZH has a potential to be used in industrial wastewater treatment.

Keywords
Recovery; Gold(III); Durio zibethinus husk
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Recovery of gold(III) from an aqueous solution onto a durio zibethinus husk
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 54, Issue 2, 15 April 2011, Pages 124–131
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us