Abstract This study aimed to create CTAB-modified bentonite organoclay (Bt@CTAB) by mixing the naturally occurring mineral (Bt) with cationic surfactant cetyltrimethylammonium bromide (CTAB). Elemental analysis, N 2 adsorption–desorption isotherm, scanning electron microscopy (SEM), FTIR spectroscopy, XRD, and thermogravimetric (TGA) analysis have been employed analyze both unmodified Bt Bt@CTA...