1. Faculty of Geography and Geology, “Al. I. Cuza” University Iasi, 11 Carol I Bd, Iasi 700506, Romania
2. Faculty of Chemical Engineering and Environmental Protection, ”Gh. Asachi” Technical University of Iasi, 73 Prof.Dr.docent D.Mangeron Blvd, 700050, Romania
3. Faculty of Chemistry, “Al. I. Cuza” University Iasi, 11 Carol I Bd, Iasi 700506, Romania