TY - JOUR TI - Statistical modelling of the adsorptive dephenolation of petroleum industry wastewater using ionic liquid treated clay AU - ABONYI, M.N. AU - ANIAGOR, C.O. AU - MENKITI, M.C. JO - Sigma Journal of Engineering and Natural Sciences PY - 2020 VL - 38 SP - 1099 EP - 1112 DO - ER -