1. METHOD VALIDATION FOR THE DETERMINATION OF EXCHANGEABLE CATIONS IN NATURAL ZEOLITES USING INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY. Authors: MARIN SENILA, OANA CADAR, MARIA-ALEXANDRA HOAGHIA, ZAMFIRA DINCA, LACRIMIOARA SENILA, IOAN ASCHILEAN, CECILIA ROMAN.2. ACTIVATED NATURAL ZEOLITES FOR PETROLEUM HYDROCARBONS ADSORPTION. Authors: MARIA-ALEXANDRA HOAGHIA, IOAN ASCHILEAN, VANDA BABALAU-FUSS, ANCA BECZE, OANA CADAR, CECILIA ROMAN, MARIUS ROMAN, MARIN SENILA, ENIKO KOVACS.3. A STRAIGHTFORWARD METHOD FOR DETERMINATION OF Ba AND Sr TOTAL CONTENT IN NATURAL ZEOLITES BASED ON MICROWAVE-ASSISTED DIGESTION AND INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY. Authors: MARIN SENILA, OANA CADAR, LACRIMIOARA SENILA, ANCA BECZE, MARIUS ROMAN, BOGDAN ANGYUS, GABRIEL BRUJ.4. EX-SITU PORTABLE X-RAY FLUORESCENCE SPECTROMETRY FOR THE MAJOR ELEMENTS DETERMINATION IN SILICATE GEOLOGICAL SAMPLES USING MATRIX-MATCHING STANDARDS FOR CALIBRATION. Authors: ANAMARIA IULIA TÖRÖK, CLAUDIU TĂNĂSELIA, CECILIA ROMAN, FERENC PUSKAS, MARIN SENILA.5. OPTIMIZATION OF GOLD SORPTION FROM AMMONIACAL THIOSULPHATE SOLUTION ON ANION EXCHANGE FIBER USING TAGUCHI EXPERIMENTAL DESIGN. Authors: EMILIA NEAG, ANAMARIA IULIA TÖRÖK, ZAMFIRA DINCA, MARIN SENILA, CERASEL VARATICEANU, ERIKA ANDREA LEVEI, EKATERINA SHILOVA, FRANCOISE BODENAN.6. REMOVAL OF RHODAMINE FROM AQUEOUS SOLUTIONS USING NATURAL ZEOLITE. Authors: LACRIMIOARA SENILA, EMILIA NEAG, DANIELA ALEXANDRA SCURTU, OANA CADAR, ANCA BECZE, CALIN HOREA TOMOIAG, MARIN SENILA.