Exploration of the mechanism of rhodium(III) co-precipitation with copper sulfide (at low rhodium concentrations) incorporating the cationic substitution reaction path

This study is a preliminary investigation into the mechanism and kinetics of Rh3+ coprecipitation with CuS upon aqueous thiosulphate addition to acidic base metal sulphate solutions, where Rh3+ concentration is two orders of magnitude lower than Cu2+, over 50 - 150 °C. The heterogeneous cationic substitution has been identified as a new precipitation path in metal sulfide co-precipitation, namely, the reaction between more soluble, co-precipitated metal sulphide (CuS) and the less soluble cation in solution (Rh3+), with the large KSP difference providing the chemical driving force.

Grantor dc:publisher.institution

Department of Chemical Engineering

Year dc:date.issued

2007

Author dc:creator

• McGeorge, Barry

Advisor dc:contributor.advisor

• Lewis, Alison Emslie

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/5442

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/5442