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Mechanically induced dewatering of ion-exchanged attapulgite flocculated by a high-molecular-weight polymer.
Colloids Surf 1985 May; 14(2):151-159
The Bureau of Mines is investigating a dewatering technique that facilitates disposal of phosphatic clay wastes. The technique involves flocculation by high-molecular-weight polyethylene oxide (peo) and mechanical deformation of the flocs in a trommel to release water. Field tests in central Florida determined that the ion-exchange form of the clay wastes affect their dewaterability. For this reason, the effect of sodium, potassium, calcium, magnesium, and aluminum exchange ions on the dewaterability of attapulgite slurries was investigated for peo of both 5 and 8 million molecular weights. An empirical equation was developed that describes the dewatering of attapulgite with the polymer peo.
OP; Journal Article
Issue of Publication
Colloids and Surfaces
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division