Record Display for the EPA National Library Catalog


Main Title Dewatering of dilute aqueous hazardous wastes using reversible gel absorption /
Author Maier, Walter J.
Other Authors
Author Title of a Work
Cussler, E. L.
Publisher U.S. Environmental Protection Agency, Hazardous Waste Engineering Research Laboratory,
Year Published 1987
Report Number EPA/600-S2-87-020
OCLC Number 17360884
Subjects Hazardous wastes--Drying ; Sewage--Purification
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-S2-87-020 In Binder Headquarters Library/Washington,DC 01/29/2018
EJBD  EPA 600-S2-87-020 In Binder Headquarters Library/Washington,DC 11/06/2018
Collation 4 pages : illustrations ; 28 cm
Caption title. At head of title: Project summary. Distributed to depository libraries in microfiche. "May 1987." "EPA/600-S2-87-020."
Contents Notes
"The feasibility 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 that 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. The gels are made from water soluble monomers; they can be easily regenerated by warming or by adding acid to release the purified water. The collapsed gels are separated by filtration and reused. 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."