SPLITT cell separation of polydisperse suspended particles of environmental interest

Split-new thin (SPLITT) cell, continuous two-way separation has been invest igated for the separation of particulate matter of environmental interest. The basic SPLITT cell operation equation is reconsidered and the effects of the particle porosity, dimension, shape and density are discussed. Suspens ions of porous silica, kaolin and montmorillonite in the submicron to micro n diameter range were separated by means of the SPLITT cell with appropriat e carrier composition. The results of the separations were checked by use o f optical and scanning-electron microscopy and are discussed with reference to the basic equations for SPLITT cell working conditions. Optimum results were in agreement with the theoretical expressions as long as the pertinen t SPLITT separation expression was employed. Quantitative results from SPLI TT cell separations were compared with those obtained by the classical stat ic sedimentation procedure, the agreement and discrepancies found ape discu ssed.