An effect of nature of anions (NO 3 − , Cl−, HCO 3 − ) present in the solution of deposition on the particle formation of Fe2O3 was investigated. It was established that from nitrate solutions large shapeless agglomerates (50–200 μm) are formed, which are composed of spherical particles (specific surface S sp = 150 m2 g−1). Introduction of chloride ions leads to the formation of cubic and oval dense particles with size of about 0.12–0.20 μm (S sp = 30 m2 g−1). An efficiency of extraction of metals from aqueous solutions was examined. The metals under study can be arranged relative to pH50 in a series: Eu3+ > Ce3+ > Cu2+ > Zn2+ > Cd2+ > Co2+ > Mn2+ > Sr2+. It was found that the sorption capacity of the synthesized Fe2O3 particles with respect to the copper is 15.6 (S sp = 150 m2 g−1) and 9.2 mg g−1 (S sp = 30 m2 g−1).
Russian Journal of Applied Chemistry – Springer Journals
Published: Nov 26, 2014
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