Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process

The recovery of gold from gold-copper and gold-cobalt cyanide based electroplating solutions using an electrogenerative process was carried out with a batch cell. The cathodes that had been used for this studied were porous graphite and reticulated vitreous carbon (RVC) while for anode was zinc foil...

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Main Author:	Aminuddin, Norazlina
Format:	Thesis
Language:	English
Published:	2011
Subjects:	QD1-999 Chemistry
Online Access:	http://eprints.usm.my/40907/1/Norazlina_Bt_Aminuddin_24MS_HJ.pdf
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spelling	my-usm-ep.409072018-07-05T02:29:09Z Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process 2011-03 Aminuddin, Norazlina QD1-999 Chemistry The recovery of gold from gold-copper and gold-cobalt cyanide based electroplating solutions using an electrogenerative process was carried out with a batch cell. The cathodes that had been used for this studied were porous graphite and reticulated vitreous carbon (RVC) while for anode was zinc foil. The influence of the presence of copper and cobalt metal ions toward gold deposition was studied by cyclic voltammetry. The recovery studies were carried out for 6 hours during which the gold in the bath solutions was determined by atomic absorption spectroscopy at regular intervals. The surface morphology and purity of the deposited gold were determined using scanning electron microscopy – energy dispersive X-ray spectrometry (SEM-EDX). More than 99% of gold was recovered after 6 h of operation using non-activated cathodes. It takes 3 h to recover more than 99 % of gold using activated cathodes. Activated RVC is a superior cathode material having the highest recovery rate compared to activated porous graphite, stainless steel and copper sheet. More gold is recovered when using a greater electrode surface area that is exposed to the catholyte solution. The results also show that at pH greater than 10 and with higher free cyanide concentration, copper will not be co-deposited with the gold. 2011-03 Thesis http://eprints.usm.my/40907/ http://eprints.usm.my/40907/1/Norazlina_Bt_Aminuddin_24MS_HJ.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QD1-999 Chemistry
spellingShingle	QD1-999 Chemistry Aminuddin, Norazlina Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process
description	The recovery of gold from gold-copper and gold-cobalt cyanide based electroplating solutions using an electrogenerative process was carried out with a batch cell. The cathodes that had been used for this studied were porous graphite and reticulated vitreous carbon (RVC) while for anode was zinc foil. The influence of the presence of copper and cobalt metal ions toward gold deposition was studied by cyclic voltammetry. The recovery studies were carried out for 6 hours during which the gold in the bath solutions was determined by atomic absorption spectroscopy at regular intervals. The surface morphology and purity of the deposited gold were determined using scanning electron microscopy – energy dispersive X-ray spectrometry (SEM-EDX). More than 99% of gold was recovered after 6 h of operation using non-activated cathodes. It takes 3 h to recover more than 99 % of gold using activated cathodes. Activated RVC is a superior cathode material having the highest recovery rate compared to activated porous graphite, stainless steel and copper sheet. More gold is recovered when using a greater electrode surface area that is exposed to the catholyte solution. The results also show that at pH greater than 10 and with higher free cyanide concentration, copper will not be co-deposited with the gold.
format	Thesis
qualification_level	Master's degree
author	Aminuddin, Norazlina
author_facet	Aminuddin, Norazlina
author_sort	Aminuddin, Norazlina
title	Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process
title_short	Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process
title_full	Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process
title_fullStr	Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process
title_full_unstemmed	Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process
title_sort	recovery of gold from gold-copper and gold-cobalt cyanide based electroplating solutions by using an electrogenerative process
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kimia
publishDate	2011
url	http://eprints.usm.my/40907/1/Norazlina_Bt_Aminuddin_24MS_HJ.pdf
_version_	1747820836865179648

Recovery Of Gold From Gold-Copper And Gold-Cobalt Cyanide Based Electroplating Solutions By Using An Electrogenerative Process

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