Abstract
SummaryThe adsorption isotherms of phosphate have been determined at pH 5 on acid‐washed K‐kaolinite and gibbsite, Na‐ and Al‐kaolinites, and K‐kaolinite in the presence of KCl at 20°C.An isotherm obtained for K‐halloysite did not support the suggestion made in Part I that any part of the adsorption was due to gross inter‐lamellar penetration in the kaolinite.It is concluded from the relative behaviour of these systems that adsorption occurs on an edge—Al(OH)2 and in some amorphous region of the clay surface.
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