MĂICĂNEANU, A. and BEDELEAN, H. 2020. Na+ - NH4+ CATION EXCHANGE STUDY ON TREATED ZEOLITIC VOLCANIC TUFF IN FIXED BED COLUMN. Studia Universitatis Babeș-Bolyai Chemia. 65, 3 (Sep. 2020), 89–100. DOI:https://doi.org/10.24193/subbchem.2020.3.07.