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Metallurgical and Materials Transactions B
Published in: Metallurgical and Materials Transactions B 2/2014

01-04-2014

Removal of Lead Hydroxides Complexes from Solutions Formed in Silver/Gold: Cyanidation Process

Authors: José R. Parga, Raul Flores Martinez, Hector Moreno, Andrew Jewel Gomes, David L. Cocke

Published in: Metallurgical and Materials Transactions B | Issue 2/2014

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Abstract

The presence of lead hydroxides in “pregnant cyanide solution” decreases the quality of the Dore obtained in the recovery processes of gold and silver, so it is convenient to remove them. The adsorbent capacity of the low cost cow bone powder was investigated for the removal of lead ions from a solution of lead hydroxide complexes at different initial metal ion concentrations (10 to 50 mg/L), and reaction time. Experiments were carried out in batches. The maximum sorption capacity of lead determined by the Langmuir model was found to be 126.58 mg/g, and the separation factor R L was between 0 and 1, indicating a significant affinity of bone for lead. Experimental data follow pseudo-second order kinetics suggesting chemisorption. It is concluded that cow bone powder can be successfully used for the removal of lead ions, and improves the quality of the silver–gold cyanides precipitate.
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Metadata
Title
Removal of Lead Hydroxides Complexes from Solutions Formed in Silver/Gold: Cyanidation Process
Authors
José R. Parga
Raul Flores Martinez
Hector Moreno
Andrew Jewel Gomes
David L. Cocke
Publication date
01-04-2014
Publisher
Springer US
Published in
Metallurgical and Materials Transactions B / Issue 2/2014
Print ISSN: 1073-5615
Electronic ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-013-9962-1

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