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Separation of Adsorbed Cation Species as Water Flows Through Clays¹

ABSTRACT

Theory predicts that adsorbed divalent cations move upstream and monovalent cations move downstream in a mixed ion system, when solutions of low concentration are forced through this clay. Data from small size mica support this prediction.

¹ Contribution from the Dept. of Soil Science and Plant Nutrition, Univ. of Western Australia at Nedlands, and the US Soils Laboratory, Soil & Water Conservation Research Division, ARS, USDA, Beltsville, Md.

² Director, US Soils Laboratory; Research Associate, Univ. of Western Australia; and Senior Lecturer in Soil Science, Univ. of Western Australia, respectively.

Received for publication April 24, 1970. Accepted for publication August 3, 1970.