OICC Press Journal of Nanostructure in Chemistry 2193-8865 4 3 (September 2014) 2014 06 25 Adsorption of chlorophenols from aqueous solution over amino-modified ordered nanoporous silica materials 10.1007/s40097-014-0114-1 EN Arezoo Ghaffari Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, IR Mohammad Saber Tehrani Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, IR Syed Waqif Husain Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, IR Mansoor Anbia Research Laboratory of Nanoporous Materials, Faculty of Chemistry, Iran University of Science and Technology, Tehran, 16846, IR Parviz Aberoomand Azar Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, IR Journal Article 2014 06 25 Abstract The capability of the adsorption of 2-chlorophenol (2-CPh) and 2,4-dichlorophenol (2,4-DCPh) from aqueous solutions with mesoporous silica material MCM-48 after functionalizing with amine groups, such as 3-(trimethoxysilyl)propyl amine and tetraethylenepentamine, was investigated in this study. It was found that amino-modified ordered mesoporous silica materials show significant adsorption for 2-CPh and 2,4-DCPh. This is possible due to the alkaline and acid interactions among the amine functional groups and chlorophenols. The adsorbents were characterized by X-ray diffraction, nitrogen adsorption–desorption isotherms and Fourier transform infrared. Batch adsorption studies were done to study the effect of various parameters like chemical modification, pH, contact time, adsorbent dose and initial concentration. It was found that adsorption of 2-CPh and 2,4-DCPh depends upon the solution pH. Adsorption data were modeled with the Langmuir and Freundlich adsorption isotherms. The data fitted the Freundlich isotherm model better than Langmuir. The kinetics analysis revealed that the overall adsorption process was successfully fitted with the pseudo-first-order kinetic model. Graphical Abstract .