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Effects of Electrolyte Imbibition Upon Cation‐Exchange Behavior of Soils
Author(s) -
Thomas Grant W.
Publication year - 1960
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/sssaj1960.03615995002400050009x
Subject(s) - imbibition , soil water , electrolyte , chemistry , ion exchange , effluent , horizon , ion , chromatography , soil science , mineralogy , geology , environmental science , mathematics , environmental engineering , botany , organic chemistry , electrode , germination , geometry , biology
Ion‐exchange chromatography was employed to study the effects of electrolyte imbibition by soils on their cation‐exchange behavior. This was accomplished by study of the shape of effluent breakthrough curves from columns of Ca‐saturated soils to which either Al +3 or K + solutions were added. B‐horizon samples of Cecil, Lloyd and Davidson, and the A p horizon of a Yolo soil were employed in the study. Comparison of experimental effluent curves with those predicted by the modified Walter equation showed a large discrepancy when anion interaction with soils was encountered. Anion distribution coefficients (Kd's) varied in the order Cl ‐ = NO 3 ‐ < SO 4 ‐2 < H 2 PO 4 ‐ on a Ca‐Lloyd soil. Only H 2 PO 4 ‐ had a Kd above zero on the Yolo soil. Column “symmetry values” for Ca +2 → K + exchange were reduced as electrolyte imbibition by soils increased. Practical implications of these results are discussed.