APPLICATION OF ETHALINE DEEP EUTECTIC SOLVENT FOR DISSOLUTION OF GOLD IN SULFIDIC REFRACTORY ORE UNDER VARYING PH

1 FAIGAL Jeanette Karen A.
Co-authors:
1 FERRER Christopher Welbourne B. 1 VILLALOBOS Lorenzo Jon M. 2 SUAYBAGUIO Zyrah Gwen I. 3 MATA May Anne E. 1,2 LOGROSA Gernelyn T.
Institutions:
1 College of Engineering and Architecture, Mapúa Malayan Colleges Mindanao, Davao City, Philippines, cea@mcm.edu.ph
2 Office for Research Development and Innovation, Mapúa Malayan Colleges Mindanao, Davao City, Philippines, research@mcm.edu.ph
3 University of the Philippines Mindanao, Mintal, Davao City, Philippines, or.upmindanao@up.edu.ph
Conference:
33rd International Conference on Metallurgy and Materials, Orea Congress Hotel Brno, Czech Republic, EU, May 22 - 24, 2024
Proceedings:
Proceedings 33rd International Conference on Metallurgy and Materials
Pages:
479-490
ISBN:
978-80-88365-21-1
ISSN:
2694-9296
Published:
2nd December 2024
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
188 views / 229 downloads
Abstract

Conventional extraction methods like cyanidation face significant challenges with refractory ores, prompting the need for more sustainable alternatives to gold extraction and its metal production. This study evaluates the application of Ethaline, a deep eutectic solvent (DES) composed of choline chloride and ethylene glycol, for dissolving gold from sulfidic refractory ores under varying pH conditions. Ethaline DES, characterized by its non-toxic and biodegradable properties, emerges as a promising solution.Experiments were conducted at three pH levels: 4 (acidic), 7 (neutral), and 10 (basic). Ore samples were treated with Ethaline DES mixed with iodine as an oxidant, and gold dissolution was monitored over a 72-hour period. The results revealed that the neutral pH condition achieved the highest gold dissolution rate, peaking at 56.7% at 48 hours, followed by the basic and acidic conditions. These findings underscore the critical role of pH in optimizing the dissolution process and highlight the potential of Ethaline DES as a green solvent for gold extraction, promoting more sustainable mining practices and reducing environmental impact.

Keywords: Gold leaching, metal extraction, DES, ethaline, green technologies, refractory ore

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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