Physical-chemical model of the behavior of titanium in a weathering profile

The literature and author's data on the standard free energy of ions and titanium complexes in aqueous solution are presented. To analyze the behavior of titanium in the process of weathering we used the method of PC physical and chemical modeling Selector software. We established that in the weathering profile (when accounting for 41 complexes and titanium ion) titanium in solution was represented by only one hydroxocomplex - Ti(OH)40. Its content was controlled by the solubility of rutile and rated 10-7 mol/l.