SBA-15 mesoporous material functionalized with 2-hydroxy-1-naphthaldehyde denoted as Q-SBA-15 was synthesized by using Schiff's base reaction to remove Cr(III) ions from aqueous solution. A series of characterizations were performed to analyze the morphology, pore structure, element distribution and chemical properties of Q-SBA-15.The results showed that BET surface area and pore size of SBA-15 decreased after modified with 2-hydroxy-1-naphthaldehyde, but the surface morphology and crystal structure of SBA-15 did not change significantly. To investigate the adsorption properties of Q-SBA-15 toward Cr(III) ions, effects of solution pH and ionic strength were studied. Moreover, adsorption kinetics, adsorption isotherm models, adsorption thermodynamics, and regeneration performance of Q-SBA-15 were analyzed. Adsorption process toward Cr(III) ions onto Q-SBA-15 was well followed by pseudo-second order kinetic model and Langmuir isotherm model. The maximum adsorption capacity of Q-SBA-15
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