Iranian Journal of Ceramic Science & Engineering
Volume 11, Issue 4 (Winter 2023)
2023, 11(4): 19-34 |
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Abdollahi Haghi H, Rezaei N, Bagheri Lotfabad T, Heydarinasab A, Yaghmaei S. Investigation of the effect of calcination temperature on the properties of titanium dioxide nanoparticles and kinetic evaluation of the adsorption process of zinc (II) ions from aqueous solution by them. Iranian Journal of Ceramic Science & Engineering 2023; 11 (4) :19-34
URL: http://ijcse.ir/article-1-907-en.html
URL: http://ijcse.ir/article-1-907-en.html
Himan Abdollahi Haghi 
, Nasim Rezaei , Tayebe Bagheri Lotfabad * 1, Amir Heydarinasab , Soheila Yaghmaei
, Nasim Rezaei , Tayebe Bagheri Lotfabad * 1, Amir Heydarinasab , Soheila Yaghmaei
1- , bagheril@nigeb.ac.ir
Abstract: (1430 Views)
The aim of this study was to prepare titanium dioxide nanoparticles calcined at different temperatures to be used for adsorption of zinc ions from aqueous medium and then to investigate the kinetics and isotherms of the adsorption process. For this purpose, nanoparticles were synthesized using the sol-gel method and then calcinated at 450 °C and 800 °C. XRD, BET, FTIR, and SEM analyses were used to investigate the structural, surface, and chemical properties of the synthesized nanoparticles. Adsorption studies revealed that the solution containing zinc with an initial concentration of 10 mg/l had the highest adsorption efficiency under conditions of pH = 7, adsorbent concentration of 0.3 g/l, and temperature of 25 ° C. Under these conditions, adsorbents prepared at 450 °C and 800 °C achieved 99% and 92% adsorption efficiencies, respectively. Adsorption isotherm studies revealed that the Freundlich, Temkin, Langmuir, and Dubinin–Radushkevich isotherms had the best agreement with equilibrium sorption data, in that order. In addition, investigations on fitting into kinetic models revealed that the quasi-second-order, Elovich and the quasi-first-order equations had the best fit with experimental data, respectively.
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