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Adsorption of Nitrate in Amorphous and Kaolinitic Hawaiian Soils
Author(s) -
Singh B. R.,
Kanehiro Y.
Publication year - 1969
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/sssaj1969.03615995003300050019x
Subject(s) - adsorption , freundlich equation , nitrate , chemistry , electrolyte , inorganic chemistry , soil water , amorphous solid , van der waals force , environmental chemistry , geology , soil science , organic chemistry , molecule , electrode
The adsorption of nitrate in an amorphous Akaka silty clay and kaolinitic Wahiawa silty clay increased consistently with increasing concentration and decreasing pH of the electrolyte solution. The magnitude of adsorption was higher in the Akaka than in the Wahiawa soil. The amount of adsorbed nitrate was notably more when SO 4 3 rather than Cl was used as the replacing anion. It was deduced that while the concentration‐dependent NO 3 adsorption is due to electrostatic and van der Waal forces, the pH‐dependent adsorption is largely due to electrostatic forces. The adsorption of nitrate followed the Freundlich type of isotherm.