The introduction of magnetic properties in adsorbent materials has the aim of improving solid-liquid separation processes. In this work, a magnetic composite was synthesized through the precipitation of manganese oxide in the presence of magnetite particles using O 2 as an oxidant. The composite proved to be chemically and physically stable within a wide range of pH values. The composite characterization indicated that hausmannite (Mn 3 O 4 ) represents the precipitated manganese phase and that magnetite undergoes no phase transformation during the synthesis. The composite and Mn 3 O 4 particles were used to remove As(III) from aqueous solutions. The magnetic composite and Mn 3 O 4 sample presented high and similar affinity for As(III), with maximum sorptive capacities of 14 mg As g solid -1 (0.0048 mmol As m

No abstract

No abstract