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Aluminum Content of Soil Extracts as a Function of pH and Ionic Strength
Author(s) -
Misra U. K.,
Blanchar R. W.,
Upchurch W. J.
Publication year - 1974
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/sssaj1974.03615995003800060020x
Subject(s) - ionic strength , aluminium , soil water , ionic bonding , ion , chemistry , environmental chemistry , inorganic chemistry , soil science , environmental science , aqueous solution , organic chemistry
The concentration of aluminum in the soil extract cannot presently be predicted from ion activity product considerations alone. Aluminum concentration in solution can be estimated from pH and ionic strength of a soil extract by the following empirical equations pH 3 to 5.6Log Al ( total ) = 1.02 − 1.34 pH +log [ 1 γ 3 ++ 1.05 × 10 − 5γ 2 + ( H + ) + 1.59 × 10 − 10γ +( H + ) 2+ 8.71 × 10 − 23γ −( H + ) 4] . pH 5.6 to 9Log Al ( total ) = 14.11 − 3.66 pH +log [ 1 γ 3 ++ 1.05 × 10 − 5γ 2 + ( H + ) + 1.59 × 10 − 10γ +( H + ) 2+ 8.71 × 10 − 23γ −( H + ) 4] .The aluminum concentration in the extracts of several soils were calculated using published data for pH and ionic strength and compared with the experimentally determined values.