Abstract
Sorption of calcium ion from the hard underground water using novel oxidized graphene (GO) sheets was studied in this paper. Physicochemical properties and microstructure of graphene sheets were investigated using Raman spectrometer, thermogravimetry analyzer, transmission electron microscope, scanning electron microscope. The kinetics adsorption of calcium on graphene oxide sheets was examined using Lagergren first and second orders. The results show that the Lagergren second-order was the best-fit model that suggests the conception process of calcium ion adsorption on the Go sheets. For isothermal studies, the Langmuir and Freundlich isotherm models were used at temperatures ranging between 283 and 313 K. Thermodynamic parameters resolved at 283, 298 and 313 K indicating that the GO adsorption was exothermic spontaneous process. Finally, the graphene sheets show high partiality toward calcium particles and it will be useful in softening and treatment of hard water.
Highlights
For a long time, graphene was a simple idea used as a spellbinding method for more unpredictable types of freshsmelling carbon and a basic framework for strong state theoreticians
The plot shows that the rate of Ca(II) adsorption is higher at the beginning time until 60 min., because the bigger surface territory of the oxide graphene sheets being accessible at starting for the adsorption of calcium ions (Zhao et al 2011)
Adsorption kinetic parameters of calcium ion on our oxidized graphene sheets agree with the adsorption nature of the other graphene oxide
Summary
Graphene was a simple idea used as a spellbinding method for more unpredictable types of freshsmelling carbon and a basic framework for strong state theoreticians. Abstract Sorption of calcium ion from the hard underground water using novel oxidized graphene (GO) sheets was studied in this paper. The kinetics adsorption of calcium on graphene oxide sheets was examined using Lagergren first and second orders.
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