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Effect of complexing anions on europium sorption on suspended silica: a TRLFS study for ternary complex formation
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P. N. Pathak
Published/Copyright:
September 25, 2009
The sorption of europium, Eu(III), on suspended silica was studied in perchlorate media under varying concentrations of Eu(III) and silica, at pH 4 to 8, and ionic strength from 0.20 to 1.40 M NaClO4 at 298 K. The complexing anions, carbonate, acetate, citrate, oxalate, phosphate and EDTA, affected the sorption of Eu(III). A synergistic enhancement in the sorption of Eu(III) was observed for oxalate and phosphate ligands. Other anions suppressed the sorption in the order: acetate < carbonate < citrate < EDTA. The results of TRLFS studies were consistent with ternary Eu/silica/ligand complexation for oxalate and phosphate anions.
Received: 2006-4-20
Accepted: 2006-10-6
Published Online: 2009-9-25
Published in Print: 2007-5-1
© Oldenbourg Wissenschaftsverlag
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