Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR

The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science...

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Main Authors: Sorvang Vasailor, Sankum Nusen, Torranin Chairuangsri, Chairoj Rattanakawin
Language:English
Published: Faculty of Science, Chiang Mai University 2020
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Online Access:https://epg.science.cmu.ac.th/ejournal/dl.php?journal_id=10702
http://cmuir.cmu.ac.th/jspui/handle/6653943832/68609
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-686092020-05-20T04:41:48Z Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR Sorvang Vasailor Sankum Nusen Torranin Chairuangsri Chairoj Rattanakawin Copper Dilute Sulfate Leachate Electrowinning Recovery Copper Ore The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so. Electrowinning of copper from dilute copper sulfate leachate (13.7 gCu/L) was performed in an electrolytic cell with stainless-steel as a cathode and lead-silver alloy as an anode. Effects of various parameters including cell voltage (2-4.5 V), time (1,800-9,000 s) and temperature (25-75 °C) on current efficiency, deposit quality and surface morphology of copper deposits were studied. Atomic adsorption spectroscopy (AAS) was used to analyze the electrowinning products such as copper sulfate solution, copper-cathode and spent electrolyte. The morphology of deposited copper on cathode was examined by using scanning electron microscopy (SEM). For single-stage electrowinning, the optimum condition was found at cell voltage of 3V, electrowinning time of 3,600 s and temperature of 55 °C, by which 98% current efficiency, 95% copper grade and 28% yield with relatively smooth deposit film of copper on the cathode were obtained. After that the efficiency, the copper grade and yield of second, third and final stages of electrowinning were sharply decreased from 96.7, 94.5 and 84.5% on the efficiency; 87.8, 87.6 and 80.3% grade; and 28.1, 27.4 and 24.5% yield in respectively. It was found that the overall stage of copper electrowinning was recommended with the total 94.4% yield of copper, and the remaining copper content in the tailing solution of 0.76 gCu/L. Moreover, surface morphology results that the surface roughness tented to increase with decreasing the temperature. Found that the temperature is a key parameter for both grade and formation of crystal copper at the cathode. Suggested that to increase the copper cathode purity, a solvent extraction should be used by increasing the sulfate concentration, say 50 g/L, prior to win the copper metal effectively. 2020-05-20T04:41:48Z 2020-05-20T04:41:48Z 2020 Chiang Mai Journal of Science 47,2 (March 2020), p.288 - 296 2465-3845 https://epg.science.cmu.ac.th/ejournal/dl.php?journal_id=10702 http://cmuir.cmu.ac.th/jspui/handle/6653943832/68609 Eng Faculty of Science, Chiang Mai University
institution Chiang Mai University
building Chiang Mai University Library
continent Asia
country Thailand
Thailand
content_provider Chiang Mai University Library
collection CMU Intellectual Repository
language English
topic Copper
Dilute Sulfate Leachate
Electrowinning
Recovery
Copper Ore
spellingShingle Copper
Dilute Sulfate Leachate
Electrowinning
Recovery
Copper Ore
Sorvang Vasailor
Sankum Nusen
Torranin Chairuangsri
Chairoj Rattanakawin
Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR
description The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.
author Sorvang Vasailor
Sankum Nusen
Torranin Chairuangsri
Chairoj Rattanakawin
author_facet Sorvang Vasailor
Sankum Nusen
Torranin Chairuangsri
Chairoj Rattanakawin
author_sort Sorvang Vasailor
title Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR
title_short Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR
title_full Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR
title_fullStr Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR
title_full_unstemmed Electrowinning of Copper from Dilute Sulfate Leachate of Oxide Copper Ore from the Sepon Mine, Lao PDR
title_sort electrowinning of copper from dilute sulfate leachate of oxide copper ore from the sepon mine, lao pdr
publisher Faculty of Science, Chiang Mai University
publishDate 2020
url https://epg.science.cmu.ac.th/ejournal/dl.php?journal_id=10702
http://cmuir.cmu.ac.th/jspui/handle/6653943832/68609
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