Sorption of Molybdenum(VI) on Synthetic Magnetite

Abstract

In this study we experimentally investigated the interaction of Mo(VI) with magnetite, which is a corrosion product of steel. The work was conducted with commercial magnetite, and we studied the influence of pH, pe and solid/liquid ratio on Mo sorption. A Surface Complexation Model (SCM) has been applied tothe experimental data, allowing to explain the results using the Diffuse Layer Model (DLM) and by considering the formation of the monodentate complex: >FeOMo(OH)5. At pH 2, experimental data were satisfactorily fitted to a a Langmuir isotherm.

Adsorption of Oxyanions from Industrial Wastewater using Perlite‐Supported Magnetite

“…SO 2À 4 is competing with SeO 2À 4 adsorption on iron oxides due to the chemical similarity of both compounds (Fukushi and Sverjensky, 2007;Verbinnen et al, 2013). Not much is known about the competition of anions with SbðOHÞ À 6 for adsorption on iron oxides, but Wang et al (2012) Magnetite (Fe 3 O 4 ) is known to be an effective adsorbent for several oxyanions like arsenite and arsenate (Shipley et al, 2009;Mamindy-Pajany et al, 2011;Aredes et al, 2012;Bujňáková et al, 2013;Lunge et al, 2014), molybdate (Rovira et al, 2006;Goldberg et al, 2009), chromate (Gallios and Vaclavikova, 2008;Yuan et al, 2010;Luther et al, 2013), selenite and selenate (Missana et al, 2009;Kim et al, 2012;Gonzalez et al, 2012), antimonate and antimonite (Mittal et al, 2013). Magnetite is easily synthesized on nanoscale (Yuan et al, 2010;Petrova et al, 2011), which is useful as adsorption capacity increases with decreasing particle size (Yean et al, 2005;Mayo et al, 2007;Petrova et al, 2011).…”