PDF

Electrophoretic studies of the adsorption of gold and silver from aqueous cyanide solutions onto activated carbon

K. Kongolo, C. Kinabo

1997enadsorptionactivated carbongoldsilvercyanide

Abstract

Language:

This study investigates the effects of Au(CN)2−, Ag(CN)2−, and Ca2+ ions in suspension solutions after adsorption onto activated carbon by measuring the zeta potential across various pH levels. It was found that polyvalent cations like Ca2+ significantly reduce the negative zeta potential by interacting with the negatively charged groups on the carbon's surface. In contrast, monovalent cations such as K+ from Au(CN)2− and Ag(CN)2− do not influence the zeta potential in alkaline and weakly acidic conditions. These precious metal cations are believed to adhere to uncharged active sites on activated carbon through chemisorptive interactions. The presence of co-adsorbed cations and anions suggests close spatial positioning on the activated carbon surface. Additionally, in strongly acidic conditions, protons may create new positive sites on the carbon, allowing for the electrostatic adsorption of Au(CN)2− and Ag(CN)2− ions. Notably, in the presence of Ca2+ and Au(CN)2− ions, a complex cation [Ca+ Au(CN)2−]+ may additionally form, enhancing adsorption dynamics.

Download

Cite This Work

@article{8782d870-d817-46fa-ac66-1bbdae905964,
  title={Electrophoretic studies of the adsorption of gold and silver from aqueous cyanide solutions onto activated carbon},
  author={K. Kongolo and C. Kinabo},
  year={1997},
  language={en}
}
TY  - JOUR
TI  - Electrophoretic studies of the adsorption of gold and silver from aqueous cyanide solutions onto activated carbon
AU  - K. Kongolo
AU  - C. Kinabo
PY  - 1997
LA  - en
ER  -

Similar Items

Towars industrial implementation of glycine-based leach and adsorption technologies for gold-copper ores

J. J. Eksteen, E. A. Oraby, B. C. Tanda, P. J. Tauetsile, G. A. Bezuidenhout, T. Newton, F. Trask & I. Bryan, B. C. Tanda a, F. Trask and I. Bryan

The technology to selectively leach gold, silver and base metals from ores, concentrates, and wastes, using an alkaline glycine solution, has initiat

2017enPDF

APPLICATION OF INNOVATIVE PROCESSES FOR GOLD RECOVERY FROM ROMANIAN MINING WASTES

Stefano Ubaldini, Igor Povar, Tudor Lupascu, Oxana Spinu, Francesca Trapasso, Daniele Passeri, Serena Carloni, Daniela Guglietta

The application of a new hydrometallurgical process for gold extraction by thiosulphate leaching from Romanian mining wastes, coming from Balan and De

2020enPDF

Extraction of Gold and other precious metals from E waste

Jaising Gadekar

E-Waste is a term used to cover items of all types of electrical and electronic equipment (EEE) and its parts that have been discarded by the owner as

2026enPDF

Study on the influence of various factors in the hydrometallurgical processing of waste printed circuit boards for copper and gold recovery

Ionela Birloaga, Ida De Michelis, Francesco Ferella, Mihai Buzatu, Francesco Vegliò

This study investigates the hydrometallurgical recovery of copper and gold from waste printed circuit boards (WPCBs) using a sequential oxidative leac

2013enPDF

The recovery of gold from its ores

A. W. Fahrenwald

This document provides a systematic examination of the occurrence, properties, production, and metallurgical recovery of gold from its ores, with part

1932enDOCX

Optimization of Integrated Steel Plant R

This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data

2025enPDF