Modelling of contaminated underground waters and host volcanic rocks interaction in the vicinity of Mayak plant, Ural, Russia
- Russian Academy of Sciences, Moscow (Russian Federation). Inst. of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry
In experiments under 20 Celsius degrees and 1 atm., the interaction was studied between model (Cs, Sr) bearing solutions and rocks sampled in the area of radiochemical plant ``Mayak`` and Karachai Lake. Three types of reactions were detected in the system including incongruent dissolution of rocks, mineral precipitation from solution, and sorption of dissolved components by solid phases. These processes were at their highest during the first few weeks of the runs, after which the composition of solutions varied but slightly. The volcanic rocks in the ``Mayak`` region are able to retardate Cs but its Sr fixation capacity is much lower. Decreasing Cs concentrations in the solution is due to its sorption by minerals of the rock. The highest values of Kd Cs of 20--30 are typical of rocks with maximum contents of chlorite. Strontium is not sorbed by solid phases, and its primary precipitation mechanism relates to carbonates formation. In nature, rock-solution interaction occurs at a slower rate than the experimental one due to much smaller contact surface between aqueous and solid phases. Yet, the results appear to be suggestive of major tendencies in this process and help evaluate its final result.
- OSTI ID:
- 220982
- Report Number(s):
- CONF-950917-; ISBN 0-7918-1219-7; TRN: IM9620%%376
- Resource Relation:
- Conference: 5. international conference on radioactive waste management and environmental remediation, Berlin (Germany), 3-9 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Fifth international conference on radioactive waste management and environmental remediation -- ICEM `95: Proceedings. Volume 2: Management of low-level waste and remediation of contaminated sites and facilities; Slate, S.; Baker, R.; Benda, G. [eds.]; PB: 911 p.
- Country of Publication:
- United States
- Language:
- English
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