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Ferric ion removal from dilute acidic solutions by fixed‐bed cation exchange
Author(s) -
Mar Brian W.,
David M. M.
Publication year - 1956
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.690020317
Subject(s) - chemistry , adsorption , ion exchange resin , diffusion , ion exchange , inorganic chemistry , volumetric flow rate , ferric , work (physics) , ion , chromatography , thermodynamics , organic chemistry , physics
The removal of a trivalent ion (Fe +++ ) from acidic nitrate solutions by a fixed bed of Dowex‐50 cation‐exchange resin was studied at entering iron concentrations from 14 to 4 meq./liter, flow rates of 0.073 to 1.20 liters/(hr.)(sq. cm.), and bed sizes from 3.7 to 5.4 g. of dry resin/sq. cm. Acid strengths were below 0.45 N . The results were correlated is a relatively simple break‐through equation based on the assumptions of an equilibrium extremely favorable to iron adsorption and liquid‐film diffusion being the rate‐controlling factor. The capacity of the resin for iron was dependent upon the acid concentration of the sulation. The results provide a design equation requiring a minimum of experimental work.