Ali, N.M. and Naife, T.M. 2021. Removal of Vanadium and Nickel Ions from Iraqi Atmospheric Residue by Using Solvent Extraction Method. Iraqi Journal of Chemical and Petroleum Engineering. 22, 1 (Mar. 2021), 15–20. DOI:https://doi.org/10.31699/IJCPE.2021.1.2.