Chaire Unesco “On the Management of Water”;
Lavoisier Laboratory of Hydrosciences;
Faculty of Sciences;
University of Bangui;
Bangui;
Central African Republic;
Laboratory of Geosystems;
and Analytical and Marine Chemistry;
University of Lille;
UMR CNRS 8217;
BatC8;
59655 Villeneuve d’Ascq cedex;
France;
Department of Chemistry;
I.U.T of Béthune;
University of Lille;
Northern France;
Rue de l’Université;
B.P.819;
62408 Béthune Cedex;
France;
Brick; Divalent; Cation; Adsorption; Electrostatic; Forces; Free; Energy; Coulombic; Solvation;