Electrofiltration of aqueous suspensions

Electrofiltration of hydrosols in fixed-bed filters was studied experimenta lly. The experimental variables examined included media type, electric fiel d strength, and suspension pH values. The extent of particle removal was fo und to improve with the application of the electric field, and lower pH val ues favor particle collection. The filtrate quality displayed the transient behavior of increasing particle concentration with time. A simple model wh ich assumes that the filter coefficient decreases linearly with the extent of deposition was developed and found capable of predicting the observed be havior. (C) 2000 Academic Press.