Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study

Details Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998gecoa..62.3657p&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 62, Issue 23-24, pp.3657-3668

Computer Science

3

Scientific paper

Attenuated total reflectance FTIR spectroscopy was used to characterize Al(III)-acetate complexation at 25°C, in homogeneous aqueous solution and at the water-aluminum hydroxide interface. The data collected in aqueous solution, at [Al] tot = 0.080 M, [OAc] tot = 0.040 M, and pH < 4.3, indicate the presence of only one dominating complex which, by spectral analysis, is shown not to involve monodentate acetate coordination but rather a syn-syn bridging geometry. In quantitative terms, the data strongly support the appearance of a binuclear mixed-hydroxo species [Al 2 (OH) 2 OAc] 3+ which, in view of the above, probably consists of a dihydroxo-bridged Al 2 ( -OH) 2 -unit to which the acetate ion bridges via the apices of the two Al(III) octahedra. Also at the water-aluminum hydroxide interface, only one dominating surface complex is indicated. In contrast to the aqueous species this complex is a weak mononuclear outer-sphere complex, and it is speculated that, due to a lack of structural flexibility of the surface Al(III) octahedra, the formation of a bridging inner-sphere complex is prohibited. Based on the concept of surface complexation, and utilizing the extended constant capacitance model to account for contributions from electrostatic forces, an equilibrium model, which quantitatively describes these interactions in an ionic medium of 0.1 M NaCl, is presented.

Affiliated with

Also associated with

No associations

Rating

Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1291903