Computer Science
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.2223c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 54, Issue 8, pp.2223-2234
Computer Science
Scientific paper
The adsorption of SeO 3 on CaCO 3 (s) was evaluated in equilibrium CaCO 3 (aq) suspensions over a range in pH and SeO 3 concentration in the absence and presence of the cosolutes, Mg, SO 4 , and PO 4 . Selenite was adsorbed by CaCO 3 (s) in a manner consistent with its exchange on anionic specific surface sites saturated with CO 3 2- /HCO 3 - that were quantified by H 14 CO 3 isotopic exchange. This exchange process was described very well using the computer program FITEQL and half-reactions for the surface exchange of HCO - 3 , CO 3 - , HSeO 3 - , and SeO 3 2- . The cosolutes SO 4 and PO 4 decreased SeO 3 sorption by direct competition or site blockage, and these effects were also predicted using the surface exchange model. By contrast, the sorption of SeO 3 was not influenced by Mg because the two ions sorbed over different pH regions and exchanged with different surface sites that appeared to be distinct and noninteractive. Evaluation of SeO 3 sorption over a wide concentration range suggested that the surface of CaCO 3 (s) was heterogeneous and that SeO 3 had access to less than 5% of the total anion specific surface sites.
Cowan Christina E.
Resch Charles T.
Zachara John M.
No associations
LandOfFree
Solution ion effects on the surface exchange of selenite on calcite 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 Solution ion effects on the surface exchange of selenite on calcite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solution ion effects on the surface exchange of selenite on calcite will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1127154