PMID: 15382858Sep 24, 2004Paper

Interaction of Eu(III)/Cm(III) with alumina-bound poly(acrylic acid): sorption, desorption, and spectroscopic studies

Environmental Science & Technology
G MontavonB Grambow

Abstract

This paper contributes to the comprehension of kinetic and equilibrium phenomena governing trace metal ion sorption on organic matter coated mineral particles. Sorption and desorption experiments were carried out with trivalent metal ions M(III) (M = Eu, Cm) and poly(acrylic acid) (PAA)-coated alumina colloids at pH 5 in 0.1 M NaClO4. Under these conditions, M(III) interaction with the solid is governed by sorbed PAA. The results were compared with spectroscopic data obtained by time-resolved laser-induced fluorescence spectroscopy (TRLFS). Within less than 30 s, a state of local equilibrium is reached between M(III) and adsorbed poly(acrylic acid). M(II) bound to the organic-mineral surface and to dissolved PAA keeps five water molecules in its first hydration sphere. Interaction of M(III) with alumina-bound PAA appears to be strongerthan with dissolved PAA. With increasing contact time, a change of the metal ion speciation occurs at the organic-mineral surface. This change is explained quantitatively by kinetically controlled reactions, which succeed a rapid local equilibrium. The experimental findings suggest, in agreement with model calculations, that a part of the initially sorbed M(III) is slowly converted to a kineticall...Continue Reading

References

May 12, 2001·Environmental Science & Technology·R M FloroiuA Torrents
May 15, 2001·Journal of Colloid and Interface Science·Th. StumpfJ. I. Kim

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Citations

Apr 5, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Guixia ZhaoXiangke Wang
Sep 23, 2018·Environmental Science and Pollution Research International·Lin XuShuao Wang
Oct 3, 2015·Environmental Science. Processes & Impacts·Yawen CaiShitong Yang
Jun 19, 2009·Environmental Science & Technology·Xiaoli TanBernd Grambow
Feb 1, 2013·Chemical Reviews·Horst GeckeisMoritz Schmidt
Apr 24, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·K K ParkW H Kim

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