Novel TiO2 NPs Loaded on Activated Carbon as a Green and High Efficient Absorbent : Synthesis, Characterization, Kinetic and Equilibrium Studies of the Adsorption of Bismarck Brown and Thymol Blue from Aaqueous Solutions

The present study focuses on the development of an effective methodology to obtain the optimum removalconditions assisted by ultrasonic to maximize the simultaneous removal of Bismarck Brown (BB) and Thymol Blue(TB) dyes on to TiO2 nanoparticles loaded on activated carbon (TiO2 -NPs-AC) in aqueous solution using responsesurface methodology (RSM). The experimental equilibrium data were fitted to the conventional isotherm models suchas Langmuir, Freundlich, Temkin and Dubinin–Radushkevich. The Langmuir isotherm was found to be the best modelfor the explanation of experimental data.From the Langmuir isotherm, the maximum monolayer capacity (Qmax) wasfound to be 100 and 50 mg g-1 for BB and TB, respectively at optimum conditions. Kinetic evaluation of experimentaldata showed that the BB and TB adsorption processes followed well pseudo-second-order.

کلیدواژه ها:

TiO2 -NPs-AC ، dye ، Central composite design ، Response surface methodology ، Ultrasonicated adsorption