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Chemical Extraction of Potassium from Soils and Micaceous Minerals With Solutions Containing Sodium Tetraphenylboron: III. Illite
Author(s) -
Scott A. D.,
Reed M. G.
Publication year - 1962
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1962.03615995002600010012x
Subject(s) - illite , chemistry , potassium , soil water , extraction (chemistry) , sodium , biotite , mineralogy , clay minerals , nuclear chemistry , analytical chemistry (journal) , chromatography , geology , materials science , metallurgy , soil science , quartz , organic chemistry
Grundite‐illite was treated with NaBPh 4 solutions at 25° C. for various periods of time to determine the amount of K that can be removed, the rate of K removal and the effect of this treatment on the properties of the mineral. Only the first 30 me. K per 100 g. were removed from <20µ illite at a rate that was comparable to the 1.6 mg. K per 100 g. per minute observed with <50µ biotite. The rest of the K was removed at a progressively slower rate but it was possible to remove 74 me. per 100 g. (68% of the total) by extracting the illite for 63 days. During this period the amount of K removed was linearly related to the logarithm of the contact time. The amount of NH 4 adsorbed and fixed by moist NH 4 ‐saturated <2µ illite was increased by 62.4 me. and 35.2 me. per 100 g., respectively, when 69.1 me. K per 100 g. were removed. When the NH 4 ‐degraded illite was oven dried even more NH 4 was fixed. There was no evidence of a change in the charge density of the illite when this much K was removed, but the lattice of the Na‐degraded illite was largely expanded to 14 Å. by glycerol.