Abstract
Wastewater effluent of the petrochemical plant for isocyanate and polyurethane derivatives contains the various harmful compounds especially aromatic amines. The aim of this study is to remove 2,4-diaminotoluene by polysulfone membranes blended with the modified GO/TiO 2 nanocomposite. In this work, GO/TiO 2 nanocomposite was functionalized by immobilization of (3-mercaptopropyl) trimethoxysilane and polymerization of allylamine over the nanocomposite surface. The nanocomposite was blended by polysulfone to form mixed matrix membrane by phase inversion method. Adsorption of 2,4-diaminotoluene in the various conditions was investigated in a batch sorption method. According to the results, the best removal efficiency was obtained at pH of 4 because of the negative charge on the external surface of adsorptive membranes. Based on the results from the Lineweaver-Burke equation, the adsorptive membranes follow the Langmuir isotherm model. The membranes showed a significant value for q m in comparison of the adsorptive filters similarly used before. Maximum q m is 35.09 mg/g for the M 0.03 membrane and 41.84 mg/g for the M 0.12 membrane at acidic pH, respectively.
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