Removal of copper (II) ion by functionalized graphene oxide nano adsorbent from wastewater sample

Khonsha, Iman

doi:10.22104/aet.2026.7599.2132

Removal of copper (II) ion by functionalized graphene oxide nano adsorbent from wastewater sample

Document Type : Research Paper

Author

Iman Khonsha

Department of Chemical Engineering, Shi.C., Islamic Azad University, Shiraz, Iran

10.22104/aet.2026.7599.2132

Abstract

In the present research, a magnetic nanostructure based on graphene oxide and iron oxide modified by the amino acid tryptophan was synthesized. The properties of the adsorber were determined using a Fourier transform infrared spectrometer, elemental analysis, X-ray diffraction, a scanning electron microscope, and a vibrating-sample magnetometer. Optimum parameters such as pH, contact time, amount of used adsorbent, initial concentration of copper ions, and the effect of temperature were investigated. Adsorption isotherm studies were conducted using the Langmuir and the Freundlich models, and the Langmuir isotherm model was found to be more consistent with the adsorption process. The theoretical maximum adsorption capacity of the adsorbent was 125 mg of copper per gram of adsorbent, which was close to the maximum adsorption capacity of the adsorbent in the real state (118 mg of copper per gram of adsorbent). To investigate the thermodynamics of adsorption, the Van't Hoff Equations were used. The results indicated that the adsorption process was endothermic. In addition, the removal rate of copper ions from the real wastewater sample in the presence of other ions was determined to be 46%.

Graphical Abstract

Keywords

Functionalized Graphene Oxide

Adsorption Isotherm

Copper Ion

Subjects

water and wastewater treatment

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