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Virginia Polytechnic Institute and State University
The oxidation rates of arsenopyrite and chalcopyrite in acidic ferric chloride solutions at 0 to 60°C
Abstract
dc:description.abstractThe rates of oxidation of arsenopyrite and chalcopyrite by Fe³⁺ at concentrations of 10⁻² to 10⁻⁵ molal with a pH near 2 and temperatures of 0 to 60°C, conditions similar to those found in weathering sulfide ore deposits, have been determined. The rate equations for 25°C are: dn<sub>Fe</sub>3+/dt = 1.9±0.4 x 10⁻⁷ (A) (m<sub>Fe</sub>3+)<sub>0.43±0.01</sub> dn<sub>Fe</sub>3+/dt = 1.5±0.4 x 10⁻³ (A) (m<sub>Fe</sub>3+)<sub>0.94±0.04</sub> for chalcopyrite and arsenopyrite respectively. The E<sub>a</sub> of chalcopyrite is 63±2 kJ mol⁻¹ (40 - 60°C). The E<sub>a</sub> of arsenopyrite varied with temperature from 18±2 kJ mol⁻¹ (0 - 25°C) to -6±2 kJ mol⁻¹(25 - 60°C).
Degree
thesis:*- Name thesis:degree_name
- M.S.
- Level thesis:degree_level
- masters
- Discipline thesis:degree_discipline
- Geology
- Department dc:contributor.department
- Geology
- Grantor dc:publisher
- Virginia Polytechnic Institute and State University
- Year dc:date.issued
- 1987
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Gagen, Patrick M.
Rights
dc:rights- Statement dc:rights
-
- In Copyright
- Licence dc:rights.uri
- Language dc:language.iso
- en
Identifiers
dc:identifier.*- Handle dc:identifier.uri
- http://hdl.handle.net/10919/106187
- OAI identifier oai:identifier
- oai:vtechworks.lib.vt.edu:10919/106187