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A novel, integrated treatment system for coal wastewaters. Quarterly report, September 2, 1991--December 1, 1991 [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
9 pages : digital, PDF file
Additional Creators
University of Michigan. Department of Chemical Engineering, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
This is the first quarterly report of the above project. The aims of this study are to develop, characterize and optimize a novel treatment scheme that would be effective simultaneously against the toxic organics and the inorganics present in coal conversion wastewaters. The initial phase of the work has been focused on the development of modified clays for use in the selective removal and recovery of heavy metals such as Cd, Cu, chromate and selenate. The results presented here show that a surfactant-modified clay adsorbs Cd strongly at a pH of 8.5 and poorly at pH 4.0. Further, the adsorption of Cd on modified clay is unaffected by the ionic strength of the medium. In the case of Cu, it has been shown that the metal forms a complex with alkyl diamines in aqueous solutions at a pH of 6.0 and does not bind to these surfactants at a lower pH of 3.0. These findings are a preliminary indication that the surface and solution chemistry of amine surfactants can be gainfully modified to adsorb and desorb cationic heavy metals.
Report Numbers
E 1.99:doe/pc/91295--t1
doe/pc/91295--t1
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
12/31/1991.
"doe/pc/91295--t1"
"DE92009085"
Wang, H.Y.; Srinivasan, K.R.
Type of Report and Period Covered Note
Quarterly; 10/01/1991 - 12/31/1991
Funding Information
FG22-91PC91295
View MARC record | catkey: 13838006