Swelling properties of pure sodium and calcium bentonites
Swelling Properties of Pure Na and Ca bentonites Swelling of natural bentonite, with mono and divalent counter ions and mixture of both bentonites, in heavy water is studied. For this purpose, pure Na and Ca bentonites are prepared by ion exchange method. 2HNMR technique is used to measure qudrupolar splitting. Electrostatic interaction between platelets is mainly responsible in swelling in case