American Journal of Applied Chemistry
Volume 3, Issue 6, December 2015, Pages: 207-211
Received: Nov. 3, 2015;
Accepted: Nov. 16, 2015;
Published: Dec. 8, 2015
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Endang Tri Wahyuni, Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Gadjah Mada University, Yogyakarta, Indonesia
Agus Kuncaka, Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Gadjah Mada University, Yogyakarta, Indonesia
Sutarno Sutarno, Laboratory of Inorganic Chemistry, Department of Chemistry, Faculty of Mathematic and Natural Sciences, Gadjah Mada University, Yogyakarta, Indonesia
For replacing the un-ecofriendly gold recovery methods, photoreduction catalyzed by TiO2 is proposed as an environmentally benign alternative method for gold recovery. In this study, the photocatalytic reduction was carried out by batch technique, in which the influences of reaction time, TiO2 photocatalyst dose, and initial Au(III) concentration were evaluated to get the optimal condition. In addition, the influence of Ag(I), Cu(II), and Fe(III) that are usually found along with gold in the gold mineral is also studied. The research results indicate that the effective Au(III) photoreduction catalyzed by TiO2 has produced brown solid powder of gold element. It is also found that the effectiveness of Au(III) photoreduction is controlled by reaction time, Au(III) initial concentration, and photocatalyst dose. Furthermore, the presence of Ag(I) and Cu(II) ions leads to the gold photodeposition decreased, meanwhile the presence of Fe(III) ion can enhance the photoreduction. It is clear that photocatalytic method is a promising method for gold recovery, with respect to the easiness, cheapness, and eco- friendliness.
Endang Tri Wahyuni,
Application of Photocatalytic Reduction Method with TiO2 for Gold Recovery, American Journal of Applied Chemistry.
Vol. 3, No. 6,
2015, pp. 207-211.
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