A novel, integrated treatment system for coal wastewaters. Quarterly report, December 2, 1991--March 1, 1992
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, chromatic and selenate. In this quarter, a detailed study of the adsorption of Cd{sup 2+} onto a surfactant-modified clay was carried out in the pH range of 3.0 and 9.0. Cd{sup 2+} is shown to bind very strongly at the higher pH and poorly at the lower pH. It is shown that this adsorbent is quite effective in removing Cd, but it may not be an optimal adsorbent for the recovery of adsorbed Cd. A new type adsorbent based on adsorbing two types of surfactants on clay was designed and prepared. Initial experiments with Cu2+ reveal that this dual surfactant complex has the potential to remove and recover Cu{sup 2+} ions from dilute solutions. These findings are a preliminary indication that the surface and solution chemistry of ammonium and amine surfactants can be gainfully modified to adsorb and desorb cationic heavy metals.
- Research Organization:
- Michigan Univ., Ann Arbor, MI (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-91PC91295
- OSTI ID:
- 10144051
- Report Number(s):
- DOE/PC/91295-T2; ON: DE92013805
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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A novel, integrated treatment system for coal wastewaters. Quarterly report, September 2, 1991--December 1, 1991
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