Removal of Ni ions from aqueous solutions using melamine-modified nano graphene oxide adsorbent

Document Type : Research Paper

Authors

1 Master of Science in Environmental Engineering, Environmental Pollution, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

2 Associate Professor, Department of Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

Abstract

Heavy metal pollutions is one of the problems that is danderous for human and the environment. Environmental pollutants such as heavy metals, when enter the human body through nutrition can damage various parts of the body such as the cardiovascular system, lungs, liver, and kidneys, and cause dangerous effects. Industrial sewage contains heavy metals such as nickel, lead, copper, zinc, and cadmium. In the present research, melamine-modified nanographene oxide was used. to investigate and identify melamine-modified nano-graphene oxide, the field emission microscope (FESEM), the Tensor Fourier transform infrared spectroscopy (FTIR) and the X-ray diffraction (XRD) were used. In this study, effects of pH (2 -7), concentration (5-200) mg/g, absorbent dose (0.01-0.06) g, temperature (15-50) °C and Contact time (15 to 150) minutes was investigated on the adsorption process To determine the adsorption mechanism, thermodynamics, pseudo first and second-order kinetics, and Freundlich and Langmuir adsorption isotherms on the adsorption process were performed. Nickel metal concentration was measured by atomic absorption spectrometry.The results showed that the adsorption rate is consistent with the Freundlich isotherm model and the pseudo-second-order kinetic equation.Thermodynamic studies also showed that the adsorption process is associated with increasing irregularities and is endothermi. highest absorption rate at a concentration of 200 mg /l, highest percentage of removal occurs in 150 minutes, which is equal to 1915/75 mg/g and 99/825%,respectively. Based on the results, melamine-modified nanographene oxide can be used as a suitable adsorbent to remove nickel from aqueous environments due to its high adsorption capacity and convenient and cost-effective performance

Keywords

Main Subjects

References

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Environmental Resources Research
Volume 13, Issue 1
July 2025
Pages 1-13

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