Absorption of calcium ions on oxidized graphene sheets and study its dynamic behavior by kinetic and isothermal models

被引：32

作者：

Fathy, Mahmoud ^{[1
]}

Moghny, Th. Abdel ^{[1
]}

Mousa, Mahmoud Ahmed ^{[2
]}

El-Bellihi, Abdel-Hameed A-A. ^{[2
]}

Awadallah, Ahmed E. ^{[3
]}

机构：

[1] EPRI, Applicat Dept, 1 Ahmed El Zomer,Box 11727, Cairo, Egypt

[2] Benha Univ, Fac Sci, Fred Nada St, Cairo, Egypt

[3] Egyptian Petr Res Inst, Dev Proc Dept, 1 Ahmed El Zomer,Box 11727, Cairo, Egypt

来源：

APPLIED NANOSCIENCE | 2016年 / 6卷 / 08期

关键词：

Graphene; Graphene sheets; Adsorption; Isothermal; Kinetic; Thermodynamics parameters; Models; AQUEOUS-SOLUTION; ADSORPTION; OXIDE; REMOVAL; NANOPARTICLES; SPECTROSCOPY; COMPOSITES;

D O I：

10.1007/s13204-016-0537-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：1105 / 1117

页数：13