Journal of the Serbian Chemical Society 2016 Volume 81, Issue 8, Pages: 907-921
https://doi.org/10.2298/JSC151008042A
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Adsorption of arsenazo (III) due by phosphorus-containing polymer sorbent
Alosmanov Rasim M. 
(Baku State University, Department of Chemistry, Baku, Z.Khalilov, Azerbaijan)
Phosphorus-containing polymer sorbent was employed for removal hazardous
Arsenazo (III) dye from water. The adsorption characteristics were determined
by the study at different parameters such as effect of solution pH, effect of
initial dye concentration, sorbent dose, phase contact time, and temperature.
The equilibrium data were analyzed on the basis of various adsorption
isotherm models, namely Langmuir, Freundlich, Temkin, and
Dubinin-Radushkevich. The highest monolayer adsorption capacity has been
obtained (24.75 mg g-1) at 55°C. Different thermodynamic parameters such as
free energy, enthalpy, and entropy have been calculated and it was concluded
that when temperature rises, adsorption increases, indicating the endothermic
nature of the process. Kinetic parameters were derived by pseudo-first-order,
pseudo-second-order and intraparticle kinetic models. Scanning Electron
Microscopy and Fourier Transform Infrared spectroscopy were used to
characterize the sorbent and also to validate the adsorption mechanism.
Keywords: dye, removal, polymeric sorbent, equilibrium, kinetic, thermo-dynamics