%0 Journal Article %T Optimization of colour pigments removal from palm oil using activated ogbunike kaolinite %A NNANWUBE, I.A. %A OKAFOR, V.N. %A OBIBUENYI, J.I. %A ONUKWULI, O.D. %A AJEMBA, R.O. %J Sigma Journal of Engineering and Natural Sciences %D 2020 %V 38 %P 253-263 %R