MODELING AND OPTIMIZATION OF THE ACTIVATION PROCESS OF OIL SHALE FOR REMOVAL OF Cd (II) USING THE RESPONSE SURFACE METHODOLOGY. Nawal Elhammoudi., Mina Oumam., Said Mansouri, Abdelkrim Abourriche, Az-iddin Chham1 and Hassan Hannache. International Journal of Recent Scientific Research Vol. 9, Issue, 5(A), pp. 26455-26464P10- MODELING AND OPTIMIZATION OF THE ACTIVATION PROCESS OF OIL SHALE FOR REMOVAL OF Cd (II) USING THE RESPONSE SURFACE METHODOLOGY