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Phosphate sorption isotherms for some Sierra Leone soils
Author(s) -
Rhodes Edward R.
Publication year - 1975
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740260704
Subject(s) - sorption , phosphate , soil water , chemistry , langmuir , sierra leone , adsorption , environmental chemistry , nuclear chemistry , soil science , geology , organic chemistry , development economics , economics
Phosphate sorption isotherms were obtained for three acid highly weathered soils of Sierra Leone, by equilibrating air dry samples for 24 h with 0.01 M KH 2 PO 4 solution at 25 °C. The Langmuir and Temkin equations were used to evaluate the sorption capacities for phosphate. Phosphate sorption maxima of 2439, 2137 and 1429 mg/kg soil and x /log c of 774, 718 and 610 were calculated; where x =phosphate sorbed (mg/kg soil) and c =equilibrium phosphate concentration (μmol dm −3 ). Qualitative relationships between these sorption parameters and other soil variables are shown.