Studies on the sorption and fixation of cesium by vermiculite
The sorption and fixation of cesium in dilute solutions by vermiculite saturated with Na or K were studied in order to investigate any possibility of its use in radioactive effluent treatment. The cesium sorbed by vermiculite with the increase in pH is attributed to the increase of sorption surface as a result of the dispersion. The increased cesium sorption by Na-vermiculite is due to the different sorption rates by the different exchange sites: external surface and internal surface. It is shown that the larger amount of sorbed cesium was extracted by KCl rather than with any other extractants. It is suggested that the fixation of cesium by vermiculite occurs at the crystal edge where Cs may replace K. Domestic vermiculite is a valuable material for use in the cesium sorption and fixation, and might be useful as a good packing material outside the tank of highly radioactive liquid waste. And from these results one could suggest that the artificial alteration of the biotite to vermiculite might be occurring by treating with NaCl. (auth)
- Research Organization:
- Korea Atomic Energy Research Inst., Seoul
- NSA Number:
- NSA-29-012640
- OSTI ID:
- 4370004
- Journal Information:
- J. Korean Nucl. Soc., v. 5, no. 4, pp. 310-320, Journal Name: J. Korean Nucl. Soc., v. 5, no. 4, pp. 310-320; ISSN KNSJA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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