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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
침전 및 콜로이드 형성을 고려한 Eu(III)와 Th(IV)의 벤토나이트 콜로이드에 대한 수착
Sorptionof Eu(III) Th(IV) on Bentonite Colloids Considering Their Precipitation an Colloid Formation
Abstract
In this study, a sorption experiment of multivalent nuclides such as Eu(III) and Th(IV) relatively stable for redox reactions was carried out for bentonite colloids which had been prepared from the domestic Gyeongju bentonite. The amounts of the nuclides lost by an attachment to bottle walls, by a precipitation, and by a colloid formation were estimated by performing blank tests for the sorption experiments. Sorption coefficients, , reflecting the mass losses were obtained and investigated for the sorption of Eu(III) and Th(IV) onto the bentonite colloids. The net sorption coefficients considering all the three mass losses were measured as about and for Eu(III) and Th(IV), respectively, depending on pH. In particular, a precipitation occurred mainly at a pH greater than 5 for Eu(III) and a precipitation and colloid formation significantly occurred at a pH greater than 3 for Th(IV). The precipitation and colloid formation of the multivalent nuclides of Eu(III) and Th(IV) therefore should be considered when are rightly obtained over the pH range where their precipitation and colloid formation become significant at a given concentration.
Europium, Thorium, Bentonite Colloids, Precipitation, Colloid Formation, Sorption Coefficient K, 유로품, 토륨, 벤토나이트 콜로이드, 침전, 콜로이드형성, 수착분배계수 K
Reference
JNFCWT
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