ABSTRACT
Sorption capacity was studied for goethite and hematite prepared at different temperatures. The results show that with increase of temperature between 200-250 ºC the specific surface area increased and quantities of immobilized ions also increased by more than 200%. Decrease of sorption capacity of hematite was observed during the next increase of temperature (250-450 °C). Hydroxo-bonds are replaced by oxo-bonds during dehydroxylation (Cornell & Schwertmann 2003). The specific surface area has the value of 32.5 m2/g for goethite and 82.3 m2/g for hematite.
