This study investigates the sorption of toluene and naphthalene by a sodium bentonite (BFN), an organoclay (WS35) and by their
respective iron oxide hydrate composites Mag_BFN and Mag_S35. The organic matter content of WS35 and Mag_S35, determined by
thermogravimetry, was used to obtain their organic matter sorption coefficients, which show that they are effective sorbents
to remove organic contaminants from water, with a higher selectivity for naphthalene than for toluene sorption. The main iron
oxide phase present in Mag_BFN and Mag_S35 is maghemite (γ-Fe2O3), which allows these sorbents to be separated from the effluent by a magnetic separation process after use.