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

Subject Areas :

Saideh Bagheri ¹ , Hossein Aghaei ² , Mehrorang Ghaedi ³

1 - Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran P.O.Box14515-755, Tehran, Iran.
2 - Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran P.O.Box14515-755, Tehran, Iran.
3 - Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.

Received: 2022-01-15 Accepted : 2022-01-15 Published : 2020-09-01

Keywords: response surface methodology, Dye, Central composite design, TiO2 -NPs-AC, Ultrasonicated adsorption,

Abstract :

The present study focuses on the development of an effective methodology to obtain the optimum removal conditions 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 response surface methodology (RSM). The experimental equilibrium data were fitted to the conventional isotherm models such as Langmuir, Freundlich, Temkin and Dubinin–Radushkevich. The Langmuir isotherm was found to be the best model for the explanation of experimental data.From the Langmuir isotherm, the maximum monolayer capacity (Qmax) was found to be 100 and 50 mg g-1 for BB and TB, respectively at optimum conditions. Kinetic evaluation of experimental data showed that the BB and TB adsorption processes followed well pseudo-second-order.