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The Adsorption of Phosphate by Kaolinitic and Montmorillonitic Clays
Author(s) -
Coleman Russell
Publication year - 1943
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/sssaj1943.036159950007000c0020x
Subject(s) - citation , library science , agricultural experiment station , soil water , state (computer science) , sociology , archaeology , history , computer science , geology , agriculture , soil science , algorithm
THE manner in which phosphorus is held by the soil has been studied by numerous investigators. Earlier workers concluded that phosphorus fixation is primarily due to its precipitation by iron and aluminum, or calcium. In recent years investigations have shown that phosphorus is adsorbed by clay min' erals, whose adsorbing power is dependent upon the type of clay minerals. The purpose of the present investigation is to study the adsorption of phosphate by kaolinitic and montmorillonitic clays, both before and after the free iron and aluminum have been removed from the clay minerals, and to determine whether precipitation by the free iron and aluminum in clay, or adsorption by the clay mineral itself, is. responsible for phosphorus fixation.