Various organoclays have been synthesized using a range of surfactants, including single and dual cationic surfactants [15,16], anionic–cationic surfactants [17], and non-ionic surfactants [18]. There are many applications for organoclays, for example, as adsorbents for organic pollutants [19–21] and the air sampling of airborne organic contaminants. Different sorption mechanisms are demonstrated, which strongly depend on the molecular structure of the organic pollutants and the quaternary ammonium cations used to modify the clay. Montmorillonite was converted into a surface-modified one using a cationic surfactant by Y. Park et al. [22]. In their study, PNP and PCP adsorption increased with increasing concentration of surfactant. They found that adsorption was enhanced by hydrophobic interaction between the partition medium and the adsorbate. Organoclays have also proven to be useful adsorbents for phenolic compounds [23]. The objective of the present study was to explore the feasibility of surfactantmodified bentonite (SMB) as an adsorbent for the removal of 2,4,6-trichlorophenol (TCP) from aqueous solutions and petroleum refinery industry effluents.