caa a22 4500 477048978 CHVBK 20180405111337.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00253455 doi (NATIONALLICENCE)springer-10.1007/BF00253455 Oxidation of arsenopyrite (FeAsS) in acid Part I: Reactivity of arsenopyrite [Elektronische Daten] [P. Fernandez, H. Linge, M. Wadsley] The oxidation reactivity of arsenopyrite FeAsS in dilute acid determines the recovery of gold from arsenopyritic gold ores by slurry electrolysis. Stoichiometric,sulfur- and arsenic- deficient arsenopyrite have practically the same oxidation rate. Arsenopyrite is covered with a metal deficient sulfide layer which appears to determine the restpotential of the electrode. This layer can be separately oxidized and reduced during bulk-oxidation of arsenopyrite. Arsenopyrite oxidation is accelerated by dissolved Na2SO4 and by high electrode potentials and solution acidity. The rate is controlled by a surface reaction with an apparent activation energy of 33kJmol−1. Chapman & Hall, 1996 Fernandez P. School of Applied Chemistry, Curtin University, 6102, Bentley, Australia aut Linge H. CSIR0I DMP, Curtin University, 6102, Bentley, Australia aut Wadsley M. Dept. of Chemical Engineering, Monash University, 3168, Clayton, Australia aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/6(1996-06-01), 575-583 0021-891X 26:6<575 1996 26 10800 https://doi.org/10.1007/BF00253455 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00253455 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fernandez P. School of Applied Chemistry, Curtin University, 6102, Bentley, Australia aut NATIONALLICENCE 700 1- Linge H. CSIR0I DMP, Curtin University, 6102, Bentley, Australia aut NATIONALLICENCE 700 1- Wadsley M. Dept. of Chemical Engineering, Monash University, 3168, Clayton, Australia aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/6(1996-06-01), 575-583 0021-891X 26:6<575 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 477048935 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer