1. ZERO-VALENT IRON NICKEL MODIFIED NATURAL ZEOLITE MATERIAL: CHARACTERIZATION AND ENVIRONMENTAL ASPECT OF APPLICATION – FIRST RESULTS. Authors: NENAD S. KRSTIĆ, VLADIMIR D. DIMITRIJEVIĆ, MAJA N. STANKOVIĆ, DEJAN T. DULANOVIĆ, MILOŠ G. ĐORĐEVIĆ, MILOŠ MARINKOVIĆ, DRAGAN M. ĐORĐEVIĆ.