Abstract
Vanadium (V) is widely used, especially in nuclear reactors, and recycling vanadium from waste has become a high priority. In this study, three titanium nanocomposites, polyacryl/TiO2 (PAA/TiO2), polyacryl-16, 16-dimethylheptadecan-1-amine/TiO2 (PAA-PJMT/TiO2) and polyacryl-ethylenediamine-tetraacetic acid/TiO2 (PAA-EDTA/TiO2), were synthesized by free radical polymerization in order to extract vanadium (V) from waste solution through cross linking into polymeric matrix. FTIR, SEM, TEM, EDX, particle size distribution, and porosity measurements are used to characterize the synthesized titanium nanocomposites. Several factors, such as pH, contact time, metal ion concentration, sorbent dose, and temperature, were studied in order to optimize V (V) sorption onto the synthesized titanium nanocomposites. After 60 min, the monolayer sorption capacities of VO2+ on PAA/TiO2, PAA-PJMT/TiO2 and PAA-EDTA/TiO2 at pH = 4 and 298 K are 120.3, 201.2 and 231.5 mg g−1, respectively. The kinetic mechanism of the reaction was discovered to be pseudo 2nd order, as well as VO2+ sorption is an endothermic and spontaneous process. Polymer degradation occurs in the prepared nanocomposites at 1 M H2SO4, and vanadium can be recovered with 96.5, 98.6, and 98.8% efficiencies for PAA/TiO2, PAA-PJMT/TiO2 and PAA-EDTA/TiO2, respectively, in the presence of the dissolved Ti(IV). The pH is increased to pH = 7 in order to precipitate Ti(IV) ions and separate it from recovered vanadium cations.
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