| 摘要 |
The present invention relates generally chalcogenide ceramics which are used to immobilize radioactive and/or hazardous waste materials contained in underground and/or aboveground storage tanks, contaminated underground soil, contaminated water supplies, and/or other incidental wastes. More particularly, in one embodiment of the present invention, a storage tank is provided which contains a composition of material comprising: (a) radioactive and/or hazardous waste components; and (b) precipitate comprising chalcogenide ceramics which controls oxidation potential of any contact water which may be present within the composition and normal ceramics, wherein the precipitates immobilize the radioactive and/or hazardous waste components. In another embodiment of the present invention, a method of immobilizing radioactive and/or hazardous liquid materials contained in a storage tank is provided comprising the steps of: pumping into the storage tank one or more solution(s) comprising (i) sulfate and/or sulfite; (ii) food for microbes; (iii) other essential elements for microbes to grow not otherwise present in the storage tank, wherein the storage tank operates under the following conditions at the time the solution is being pumped into the storage tank: (i) the temperature of the storage tank is between 5° C. and 62° C.; (ii) the pH of the storage tank is between 3 and 10; and (iii) the redox potential of the solution in the storage tank is between -10 and +2.
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