In this paper, the results of possibility for preparation of material for aflatoxin B1 adsorption, based on modification of montmorillonite with copper ions, re presented. The bentonite clay from Sokolac deposit (Šipovo, Bosnia) was used as the starting raw material. It was determined that ion exchange degree of inorganic cations in montmorillonite with copper ions increase with increasing the initial copper concentration in solution. The copper modified montmorillonite with 2.65% of copper was selected for aflatoxin B1 adsorption experiments. It was shown that montmorillonite, as well as the copper modified montmorillonite were efficient in adsorption of aflatoxin B1, at different amounts of solid phase in suspension, and at different pH values. Thus, at the amount of solid phase in suspension 10 g/l, aflatoxin B1 adsorption index for montmorillonite was 100% at pH 3, 98% at pH 7 and 96% at pH 9. For copper modified montmorillonite, at the same amount of solid phase the following aflatoxin B1 adsorption indexes were achieved: 98% at pH 3, 98% at pH 7 and 96% at pH 9. No differences in adsorption of this toxin by both montmorillonites with decreasing the amount of solid phase in suspension (0.5 g/l) were observed. That means that ion exchange of inorganic cations in montmorillonite with copper ions, did not cause any changes in aflatoxin B1 adsorption, at pH 3, as well as at pH 7 and 9. It was also noticed that adsorption of aflatoxin B1 by both adsorbents was not pH dependent.

U ovom radu su dati rezultati ispitivanja mogućnosti dobijanja materijala za adsorpciju aflatoksina B1 modifikacijom minerala montmorilonita jonima bakra. Ispitivanja su rađena na bentonitskoj glini koja se eksploatiše u ležištu Sokolac kod Šipova u Republici Srpskoj. Rezultati pokazuju da stepen jonske izmene neorganskih katjona u montmorilonitu jonima bakra raste sa porastom polazne količine bakra u rastvoru. Za ispitivanja adsorpcije aflatoksina B1 na montmorilonitu modifikovanom jonima bakra je odabran proizvod sa sadržajem bakra 2.65%. Određeno je da montmorilonit, kao i montmorilonit modifikovan jonima bakra efikasno adsorbuju aflatoksin B1, pri različitim sadržajima čvrste faze u suspenziji, kao i na različitim pH. Pri sadržaju čvrste faze u supenziji 10 g/l, indeks adsorpcije aflatoksina B1 na montmorilonitu iznosi 100% na pH 3, 98% na pH 7 i 96% na pH 9. Na montmorilonitu modifikovanom jonima bakra, pri istom količini čvrste faze u suspenziji, dobijene su sledeće vrednosti indeksa adsorpcije aflatoksina B1: 98% na pH 3, 98% na pH 7 i 96% na pH 9. Sa smanjenjem količine čvrste faze u suspenziji (0.5 g/l), ne dolazi do smanjenja indeksa adsorpcije ovog toksina na oba adsorbenta. To znači da, jonska izmena neorganskih katjona u koncentratu montmorilonita sa jonima bakra nije dovela do smanjenja indeksa adsorpcije aflatoksina B1, kako na pH 3, tako i na pH 7 i 9. Zapaženo je i da adsorpcija aflatoksina B1 na oba adsorbenta ne zavisi od pH sredine.