LEACHING STUDIES OF BITUMEN WASTE FORMS INCORPORATING CHEMICAL COMPOUNDS OF A WIDE RANGE OF SOLUBILITY
Bitumen (oxidized bitumen PURBITOX Type P.3) waste forms incorporating NaNO-3, SrSO-4, Fe-2O-3 and CeO-2 salts were exposed to slowly renewed distilled water at 50 degrees C for up to 390 days. Hydration rate has been followed by measuring the weight increase of the bitumen samples. The hydration increases with the increasing of the solubility of the compound. In the case of sodium nitrate an extensive swelling, corresponding to an elevated water pick up, begins after 50 days of exposure to water. The leaching rate has been measured by the analysis in the leachate of the different cations. It has been verified that the leaching rate decreases with the decreasing of the solubility. The possible dependence of these two parameters is discussed.
Bibliographic Reference: EUROPEAN APPLIED RESEARCH REPORTS, NUCLEAR SCIENCE AND TECHNO VOL. 5, NO. 3, PP 325-362, 1983, (EUR 8565 E).
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Record Number: 1989122029100 / Last updated on: 1987-01-01
Available languages: en