Thermodynamics applied to potassium exchange in aluminosilicate minerals and soils.

C1 - Edited contributions to conferences/learned societies

Goulding, K. W. T. 1986. Thermodynamics applied to potassium exchange in aluminosilicate minerals and soils. International Society of Soil Science (ISSS). pp. 1133-1143

AuthorsGoulding, K. W. T.
Abstract

The enthalpies of Ca-»K exchange in 2:1 layer silicate minerals and in soils identify six types of cation exchange site, with up to four in any one soil or clay, which control ion exchange and the extent to which clays swell on adsorption of glycol. It is suggested that these sites are on the planar surfaces of mica, illite, vermiculite and montmorillonite, with a particular type of strongly K selective site at steps, cracks and expansion boundaries (wedge zones) of micaceous clays. Such thermodynamic measurements permit the quantitative determination of very small amounts of 2:1 layer silicate minerals and their K contents in clays and soils with mainly 1:1 or amorphous minerals, and thus a more precise determination of K exchange behaviour, especially selectivity and fixation.

Year of Publication1986
Conference title13th Congress of the International Society of Soil Science
Conference locationHamburg
Web address (URL)https://iuss.boku.ac.at/files/transactions_vol_vi_hamburg_1986_compressed.pdf
Open accessPublished as bronze (free) open access
Journal citationpp. 1133-1143
PublisherInternational Society of Soil Science (ISSS)
Book titleTransaction of the 13th Congress International Society of Soil Science, vol.III
File
Output statusPublished
Publication dates
Print13 Aug 1986
Copyright licensePublisher copyright
Collective title Transaction 13th Congress International Society of Soil Science, vol.III, Hamburg, 1986. Hamburg : ISSS
Page range1133-1143

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