Conditioning hazardous wastes with cement
- Univ. of Aberdeen, Old Aberdeen (United Kingdom)
Cementitious materials, including Ca(OH)2 and Portland cement, are widely used to condition wastes for disposal. Physical confinement is easily demonstrated, but additionally, cements have a unique chemical conditioning action. A cost-benefit analysis depends on being able to quantify this chemical conditioning action. A case study approach is used to show how this can be done, using selected inorganics (Ni, Cr, U) as examples. Laboratory data should preferably be obtained in a form suitable for thermodynamic modelling; not only does this impose rigor, but it also ensures that data are of general applicability, i.e. not site-specific. The interaction of cement with some simple, water-soluble organics are described. The future performance of cemented wastes in burial sites is site dependent; scale, local geochemistry and the kinetics and mechanisms of waste degradation are important factors which cannot be determined entirely in the laboratory. Some principles are described whereby laboratory and field studies can be related.
- OSTI ID:
- 370027
- Report Number(s):
- CONF-960376-; TRN: 96:003805-0076
- Resource Relation:
- Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of 211th ACS national meeting; PB: 2284 p.
- Country of Publication:
- United States
- Language:
- English
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