TY - CPAPER AU - S. Dimitrova AU - I. Kostova AU - S. Petrova TI - PROGNOSIS FOR FIXED BED CLIPTILOLITE PERFORMANCE IN THE PROCESS OF METAL IONS REMOVAL T2 - 6th International Scientific Conference - SGEM PY - 2006 SP - 297 EP - 306 PB - SGEM Scientific GeoConference ER -