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EFFECTS OF BENTONITE CLAY SOLIDS ON POLIOVIRUS CONCENTRATION FROM WATER BY MICROPOROUS FILTER METHODS
Citation:
Sobsey, M. AND T. Cromeans. EFFECTS OF BENTONITE CLAY SOLIDS ON POLIOVIRUS CONCENTRATION FROM WATER BY MICROPOROUS FILTER METHODS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-85/047.
Description:
In order to determine if suspended solids interfere with enteric virus recovery from water by microporous filter methods, the effects of bentonite clay solids at a concentration of 10 NTU on the recovery of poliovirus type 1 from seeded, activated carbon-treated, filtered tap water were studied. Five hundred-ml volumes of virus-laden water at pH 5.5 or 7.5, with and without 50 mM MgCl2, were filtered through 47 mm diameter, electropositive (Virosorb 1MDS) and electronegative (Filterite) filters that had been pretreated with Tween 80 to minimize direct virus adsorption to filter surfaces. Bentonite solids enhanced virus retention on both types of filters, even under conditions where viruses were not solids-associated. However, bentonite solids also interfered with elution of retained viruses when eluting with 0.3% beef extract-50 mM glycine, pH 9.5. (Copyright (c) 1985, American Society for Microbiology.)