Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.2589c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 56, Issue 7, pp.2589-2593
Physics
Scientific paper
A simple heuristic approach to describing leaching under intraparticle diffusion control conditions is described. The approach, based on the use of distribution theory to describe the heterogeneity of porous solids such as coal and metal ores, can ascribe the appearance of observed induction times and rate maxima to the intraparticle diffusion process itself. Rate of leaching and extent of leaching derived from a modified lognormal distribution function have been applied successfully to reported data on five diverse two- or three-phase reaction systems involving pyrite removal, copper recovery, methane desorption, and ethyl acetate elutriation.
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