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An Experimental Study on the Sorption of U(VI) onto Granite  

Min-Hoon Baik (Korea Atomic Energy Research Institute)
Pil-Soo Hahn (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.34, no.5, 2002 , pp. 445-454 More about this Journal
Abstract
The sorption of U(Vl) on a domestic granite is studied as a function of experimental conditions such as contact time, solution-solid ratio, ionic strength, and pH using a batch procedure. The distribution coefficients, $K_{d}$＇s, of U(VI) are about 1-100mL/g depending on the experimental conditions. The sorption of U(VI) onto granite particles is greatly dependent upon the contact time, solution-solid ratio, and pH, but very little is dependent on the ionic strength. It is noticed that an U(VI)-carbonate ternary surface complex can be formed in the neutral range of pH. In the alkaline range of pH above 7, U(VI) sorption onto granite particles is greatly decreased due to the formation of anionic U(VI)-carbonate aqueous complexes.s.
Keywords
sorption; granite; distribution coefficient $(K_d)$uranium speciation; U(Vl)- carbonate complexes;
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