Study on Extraction Performance of Vanadium (V) from Aqueous Solution by Octyl-Imidazole Ionic Liquids Extractants

It is worth it to explore the extraction performance for vanadium by imidazole ionic liquids. The of (V) was studied using [Omim]Cl, [Omim]Br, and [Omim][BF4] as extractants. effects various diluents, equilibrium time, temperature, anion species were investigated. structure-activity relationship ILs discussed calculating lattice energy based on Glasser theory volume anions. results show that n-pentanol optimum diluent. Under conditions an time 60 s temperature 25 °C, rates V reached 97.93%, 96.59%, 87.01%, respectively. Furthermore, theory, liquids decreased in order [Omim]Cl > [Omim]Br [Omim]BF4. anions increased Cl− < Br− BF4− HVO42−. rate depended size strength interaction between imidazolium cation. counterevidence experiments verified larger volume, easier combine with cation organic phase, extracted compound lower. statistical analysis showed effect not significant model, a efficiency (V).