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The role of conduction/valence bands and redox potential in accelerated mineral dissolution
Author(s) -
Leblanc S. E.,
Fogler H. S.
Publication year - 1986
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690321013
Subject(s) - dissolution , chemistry , manganese , inorganic chemistry , valence (chemistry) , redox , kinetics , base (topology) , oxide , manganese oxide , reaction rate , ion , catalysis , organic chemistry , mathematical analysis , physics , mathematics , quantum mechanics
The dissolution kinetics of a number of manganese oxides in acidic solutions were studied. Using a slurry reactor, rate laws were determined for each of the manganese oxides in the hydrohalogen acids. Significant variations in the reaction rates (up to five orders of magnitude over the HCl base rate) were obtained with different acids. The addition of anions as neutral salts to acidic solutions is shown to produce the same rate‐accelerating effect as acids containing that anion. The effect of the different acids on the oxide dissolution rates is explained using semiconductor band theory and energy diagrams.