Abstract
AbstractCalcium phosphate hydroxyapatite (Ca-Hap) synthesized from
CaCO3 and
H3PO5, it was characterized by
scanning electron microscopy, Fourier transform infrared, and X-ray diffraction. The
Ca-Hap was used for the removal of Alizarin Red S dye from its aqueous solution. The
kinetics, equilibrium, and thermodynamic of the adsorption of the dye onto the
Ca-Hap were investigated. The effects of contact time, initial dye concentration, pH
as well as temperature on adsorption capacity of Ca-Hap were studied. Experimental
data were analyzed using six model equations: Langmuir, Freudlinch,
Redlich–Peterson, Temkin, Dubinin–Radushkevich, and Sips isotherms and it was found
that the data fitted well with Sips and Dubinin–Radushkevich isotherm models.
Pseudo-first-order, pseudo-second-order, Elovic, and Avrami kinetic models were used
to test the experimental data in order to elucidate the kinetic adsorption process
and it was found that pseudo-second-order model best fit the data. The calculated
thermodynamics parameters (∆G°, ∆H° and ∆S°)
indicated that the process is spontaneous and endothermic in nature.
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Cell Biology,Physical and Theoretical Chemistry,Materials Science (miscellaneous),Atomic and Molecular Physics, and Optics,Biotechnology
Reference37 articles.
1. Adeogun AI, Kareem SO, Durosanya JB, Balogun SE (2012) Kinetics and
equilibrium parameters of biosorption and bioaccumulation of lead ions from
aqueous solutions by Trichoderma
longibrachiatum. J Microbiol Biotechnol Food Sci
1:1221–1234
2. Ali M, Sreekrishnan TR (2001) Aquatic toxicity from pulp and paper
mill effluents—a review. Adv Environ Res 5:175–196
3. Aniruldhan TS, Radhakrishnan PG (2008) Thermodynamics and kinetics
of adsorption of Cu (II) from aqueous solutions onto a new cation exchanger
derived from tamarind fruit shell. J Chem Thermodyn 40:702–709
4. Bello OS, Adeogun AI, Ajaelu JC, Fehintola EO (2008) Adsorption of
methylene blue onto activated carbon derived from periwinkle shells: kinetics
and equilibrium studies. Chem Ecol 24:285–295
5. Carneiro PA, Osugi ME, Fugivar CS, Boralle N, Furlan M, Zanoni MV
(2005) Evaluation of different electrochemical methods on the oxidation and
degradation of Reactive Blue 4 in aqueous solution. Chemosphere
59(3):431–439
Cited by
28 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献