Author/Authors :
Zohdi، Nima نويسنده 1Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia , , Mahdavi، Fariba نويسنده Advanced Materials and Nanotechnology Laboratory, Institute of advanced technology, Universiti Putra Malaysia, Serdang, Selangor, Malaysia , , Abdullah، Luqman Chuah نويسنده 1Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia , , SY Choong، Thomas نويسنده 1Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia ,
Abstract :
Boron removal capacity of multi-walled carbon nanotubes (MWCNTs) modified with tartaric acid was investigated in
this study. Modification of MWCNTs with tartaric acid was confirmed by Boehm surface chemistry method and fourier
transform infra-red (FT-IR) spectroscopy. Experiments were performed to determine the adsorption isotherm and
adsorption thermodynamic parameters of boron adsorption on tartaric acid modified MWCNTs (TA-MWCNTs).
The effect of variables including initial pH, dosage of adsorbent, contact time and temperature was investigated.
Analysis of data showed that adsorption equilibrium could be better described by Freundlich isotherm and the
maximum adsorption capacities obtained at the pH of 6.0 was 1.97 mg/g. The estimated thermodynamic values
of free energy (?G°), entropy (?S°) and enthalpy (?H°) indicated a spontaneous and an endothermic process.
Furthermore, the TA-MWCNTs was magnetized for separation of boron-contaminated adsorbent from aqueous
solution by applying magnetic field. The results showed that magnetic TA-MWCNTs particles were separated
effectively after adsorption from contaminated water.
