Other
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gecoa..58.1999b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 58, Issue 9, pp.1999-2010
Other
9
Scientific paper
The surface coordinative chemical model of mineral dissolution--surface chemical interaction with H + , OH - , metal ions, and ligands to form an array of surface complexes whose reactivities determine the mechanisms of many surface-controlled processes--has been successfully applied to interpret and quantify proton and ligand dependent dissolution rates of oxides and silicates. Here this model is extended to include the effects of inhibition. Experimental data are presented on the various factors which enhance and inhibit the nonreductive dissolution and the reductive dissolution (by H 2 S) of various Fe(III)(hydr) oxides ( -Fe 2 O 3 , -FeOOH, and -FeOOH). The effects observed with iron oxides are similar to those expected to occur with other oxide and aluminumsilicate minerals. Special attention is paid to the effects of changes in surface protonation brought on by the binding of cations and anions to the surface. Binuclear surface complexes, especially those formed by the adsorption of oxoanions such as phosphate, arsenate, borate, and sulfate, are particularly good at inhibiting both the reductive and nonreductive dissolutions of a reference system of iron (III) oxides. This phenomenon is due to (1) the large activation energy which must be overcome to simultaneously detach two surface metal centers and to (2) the lack of additional surface protonation when uncharged binuclear or multinuclear complexes are formed.
Biber Madeleine V.
Dos Santos Afonso Maria
Stumm Werner
No associations
LandOfFree
The coordination chemistry of weathering: IV. Inhibition of the dissolution of oxide minerals 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 The coordination chemistry of weathering: IV. Inhibition of the dissolution of oxide minerals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The coordination chemistry of weathering: IV. Inhibition of the dissolution of oxide minerals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-886155