“…Thereinto, adsorption has become a widely used method for the treatment of catechol due to its simple operation, low cost, and high efficiency. Now, many materials are used as adsorbents to remove catechol from water such as activated carbon [12,13], dolomite [14], montmorillonite [15], hydroxyapatite [16], organophilic-bentonite [17], hematite [18], goethite [19], rutile TiO 2 [20], α-alumina [21], magnetic vermiculite [22], resin [23], and waste Fe(III)/Cr(III) hydroxide [24]. These aforementioned materials were modified to increase the pore structure, specific surface area, or special functional groups, thereby enhancing their adsorption effect.…”