Vanadium extraction from acidic solution using Alamin 336 and octylamin coated on bare nanoparticles

In this study vanadium (V) was extracted from acidic solution using of two extractants, Alamin 336 (trioctylamine) and octylamine which coated on the surface of magnetic nanoparticles. Magnetic iron oxide nanoparticles were successfully synthesized by co-precipitation method. XRD analysis showed the magnetite phase with crystal size of 15 nm for synthesized nanoparticles. The surfaces of the particles were coated by alamin 336 and octylamine and then were used for vanadium separation from acidic solution. Vanadium (V) extractions from synthetic solution lead to remove of %88.89 and %96.29 of vanadium (V) by Alamin 336 coated and octylamine coated nanoparticles, respectively. Although these results were promising in this stage higher extraction by octylamine as a novel extractant was interesting. FT-IR analysis for prepared adsorbents showed that the amines were successfully coated on the nanoparticle’s surfaces. The bands centered around 3440 cm-1 and 1630 cm-1 were assigned to the O–H vibrations of adsorbed water on the surface of nanoparticles in both samples. The peak at 570 cm-1 corresponded to the Fe–O vibration of Fe3O4. Presence of C-H binds of alamin 336 was confirmed by peaks at wave numbers of 2924 and 2853 cm-1 and a weak peak in 2960 cm-1. A band in the region of 2930 cm-1 was ascribed to asymmetric stretching of the C–H2 groups. Two weak bands around 2930 cm-1 were attributed to symmetric stretching of C–H2 and asymmetric stretching of C–H3. A band at 1053 cm-1 assigned to C–N stretching vibrations. The results indicated that octylamine has been grafted onto the Fe3O4 nanoparticles. FT-IR analysis founding after extraction in acidic solution was different. Alamin 336 separated from nanoparticles and vanadium just adsorbed by nanoparticles but octylamine remained on the surface of nanoparticles