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- W2894940423 abstract "Abstract Smectite-rich natural clay is being evaluated as the backfill and buffer material in the Indian repository program for the nuclear high level waste disposal. In the natural clay, montmorillonite is one of the major mineral component governing the sorption behavior of various radionuclides. In the present work, influence of sulfate anion on sorption of Eu(III) by Na-montmorillonite has been investigated. The effect of pH and sulfate concentration on Eu(III) sorption by Na-montmorillonite was used to understand the mechanism of sorption process. The Eu(III) sorption by clay at varying pH was virtually pH independent at lower pH (<4), with ion exchange as the dominant mode for Eu(III) sorption. In the pH region of 4–6.5, sharp increase in sorption indicates surface complexation as predominant mechanism. At pH>6.5, the sorption attained a constant value. To deduce the mechanism of sorption of Eu(III) on Na-montmorillonite surface in presence of sulfate, ATR-FTIR spectroscopic investigations has been carried out which indicate the presence of sulfate bearing species on Na-montmorillonite surface. Using spectroscopic findings as a guide, the surface complexation modeling, in absence and presence of sulfate, was successfully carried out." @default.
- W2894940423 created "2018-10-12" @default.
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- W2894940423 date "2018-09-29" @default.
- W2894940423 modified "2023-10-16" @default.
- W2894940423 title "Effect of sulfate on sorption of Eu(III) by Na-montmorillonite" @default.
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- W2894940423 doi "https://doi.org/10.1515/ract-2018-2964" @default.
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