MALEIC ANHYDRIDE FUNCTIONALIZED TIO2 (TIOMA) NANOPARTICLES FOR DECONTAMINATION OF CU (II) FROM WATERANANTA SAIKIA, BIJOY TUDU AND PRANJAL SAIKIAAbstract Functionalization of titanium dioxide (TiO2) nanoparticles was done using maleic anhydride (MA) and adsorption of copper (II) on MA functionalized TiO2 nanoparticles (TiOMA) was studied. Percentage adsorption of Cu (II) on TiOMA was determined with respect to pH, contact time and adsorbent dose. The study revealed that the removal of Cu (II) was best achieved at pH range from 7.0 to 9.0. The initial 15 mg/L Cu (II) concentration came down to less than 0.53 mg/L at contact time 180 min with adsorbent dose of 0.6 g/50 mL. The adsorption was studied for Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms. The Langmuir isotherm model was found to be best fitted. During the study, the thermodynamic parameters like enthalpy change (H°), free energy change (G°), entropy change (S°) and activation energy (Ea) were determined for the better understanding of the adsorption process. The adsorption was found to be kinetically pseudo-second order controlled process. |