Karakterizacija zeolitskog tufa iz ležišta "Igroš-Vidojevići" sa geološkog i tehnološkog aspekta
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Abstract
U radu su prikazani rezultati ispitivanja zeolitskog tufa iz ležišta "Igroš-Vidojevići" u cilju sagledavanja mineragenetske karakteristike ležišta, utvrđivanja kvaliteta zeolita, primene i načina valorizacije. Iz tih razloga je uzet uzorak iz podine ležišta "Zeolit 1" i uzorci središnjeg dela ležišta "Zeolit 2", "Zeolit 3", "Zeolit 4" i "Zeolit 5". U karakterizaciji uzoraka primenjene su sledeće metode: elementna hemijska analiza, kvantitativna SEM/EDS analiza, određivanje koeficijenta adsorpcije metilen plavog i kapaciteta katjonske izmene (KKI), rendgenska difrakcija praha (RDP), termijska analiza (TG, DTA) i infracrvena spektroskopija sa Furijeovom transformacijom (FTIR). Rezultati rendgenske i termijske analize su pokazali da podinu ležišta u najvećoj meri čini glina, dok je u ostataku ležišta zeolit. Sa mineragenetskog aspekta zapaža se da se radi o zeolitu-klinoptilolitu koje je najveće u uzorcima "Zeolit 2" i "Zeolit 3", pa su oni i najkvalitetniji. Na to ukazuju i vrednosti njihovog KKI i to 141,99 mmol/100g odnosno 121,01 mmol/100g. Uzorci "Zeolit 4" i "Zeolit 5" imaju nešto manji KKI (89,48 mmol/100g i 83,75 mmol/100g), lošijeg su kvaliteta.
Rezultati rendgenske i termijske analize su pokazali da podinu ležišta u najvećoj meri čini glina, dok je u ostataku ležišta zeolit. Sa mineragenijskog aspekta se može reći da je prisustvo zeolitskih minerala hojlanditskog tipa najveće u uzorcima "Zeolit 2" i "Zeolit 3", pa su oni i najkvalitetniji. Na to ukazuju i visoke vrednosti njihovog KKI i to 141,99 meq/100g odnosno 121,01 meq/100g. Zbog toga bi ovi uzorci mogli imati praktičnu primenu kao adsorbenti neorganskih zagađivača iz kontaminiranih voda, a zbog visokog sadržaja osnovnog zeolitskog minerala potencijalno se mogu koristiti i kao sredstvo za uklanjanje mikotoksina iz stočne hrane. Uzorci "Zeolit 4" i "Zeolit 5" imaju nešto niži KKI (89,48 meq/100g i 83,75 meq/100g), slabijeg su kvaliteta, pa se potencijalno mogu upotrebiti za poboljšanje kvaliteta zemljišta.
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