1. THE INFLUENCE OF THE OXIDIZING AGENTS ON THE KINETICS OF COPPER LEACHING FROM CHALCOPYRITE CONCENTRATE WITH SULPHURIC ACID. Authors: CAMELIA LUMINITA VARGA, IOAN BÂLDEA, ANCA MIHALY COZMUŢĂ.2. STUDY ABOUT THE AFFINITY FOR HEAVY METALS OF SPONTANEOUS VEGETATION THAT GROWS UP ON THE WALLS OF THE TAILING PONDS. Authors: LEONARD MIHALY COZMUŢA, ANCA MIHALY COZMUŢĂ, CAMELIA LUMINITA VARGA, ANCA PETER.3. THE INFLUENCE OF THE OXIDIZING AGENTS ON THE KINETICS OF COPPER LEACHING FROM CHALCOPYRITE CONCENTRATE WITH SULPHURIC ACID. Authors: CAMELIA LUMINITA VARGA, IOAN BÂLDEA, ANCA MIHALY COZMUŢĂ.