Purification of waste waters containing 60Co2+, 115mCd2+ and 203Hg2+ radioactive ions by ETS-4 titanosilicate |
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| Authors: | K Popa C C Pavel N Bilba A Cecal |
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| Institution: | (1) Department of Inorganic and Analytical Chemistry, “Al.I. Cuza” University, 11 - Carol I Blvd., 700506 - Iasi, Romania;(2) Department of Theoretical, Physical and Materials Chemistry, “Al.I. Cuza” University, 11 - Carol I Blvd., 700506 - Iasi, Romania;(3) Department of Theoretical, Physical and Materials Chemistry, “Al.I. Cuza” University, 11 - Carol I Blvd., 700506 - Iasi, Romania;(4) Department of Inorganic and Analytical Chemistry, “Al.I. Cuza” University, 11 - Carol I Blvd., 700506 - Iasi, Romania |
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| Abstract: | Summary The sorption of 60Co2+, 115mCd2+ and 203Hg2+ from diluted solutions (as analogues for radioactive waste waters) on ETS-4 microporous titanosilicate was studied at 277,
293, 313 and 333 K by measuring the sorption kinetics using a batch-method. The sorption of these radiocations was compared
by means of the distribution coefficient and of the sorption capacity. The maximum sorption capacities follow the order: 203Hg2+>115mCd2+360Co2+. The thermodynamic functions of the sorption processes have been estimated. The increase of the absolute value of DG° with increasing temperatures shows that higher temperatures favor ionic exchange. |
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