Record Display for the EPA National Library Catalog


Main Title Dewatering of Dilute Aqueous Hazardous Wastes Using Reversible Gel Absorption.
Author Maier, W. J. ; Cussler, E. L. ;
CORP Author Minnesota Univ., Minneapolis.;Environmental Protection Agency, Cincinnati, OH. Hazardous Waste Engineering Research Lab.
Year Published 1987
Report Number EPA-68-03-1957; EPA/600/2-87/020;
Stock Number PB87-168761
Additional Subjects Waste water ; Dewatering ; Gels ; Absorption ; Concentration ; Water removal ; Water treatment ; Hazardous materials ;
Library Call Number Additional Info Location Last
NTIS  PB87-168761 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 96p
The feasiability of using crosslinked gels in a reversible process for extracting pure water from aqueous waste solutions has been investigated. It has potential for concentrating waste streams that contain hazardous chemicals. Near critical gels have been developed which swell and collapse as a function of process conditions. At low temperature or high pH, these gels swell by absorbing water. During swelling, they exclude larger solutes, including many hazardous materials. Solutes and colloidal pollutants thus may be concentrated to facilitate treatment and disposal. In this study gels have been contacted with solution containing a wide range of different molecular weight solutes and colloids to determine water extraction capacity and efficiency of solute rejection.