1. "Gh. Asachi" Technical University of Iasi, Faculty of Chemical Engineering & Environmental Protection, Department of Environmental Engineering and Management, 71 A D. Mangeron Blvd., 700050 Iasi, Romania
2. "Al. I. Cuza" University of Iasi, Faculty of Geography and Geology, Department of Geology and Geochemistry, 20 A Carol I Blvd., 700506 Iasi, Romania