Kinetic study of dye pollutant removal using created GO nanosheet onto graphite substrate as a low-cost and biodegradable adsorbent

In the present study, graphene oxide (GO) sheets were successfully synthesized from a low-cost graphite sheet (GS) through an electrochemical anodization process. This method was selected due to its simplicity, scalability, and environmental compatibility compared to conventional chemical oxidation routes, which often involve hazardous reagents. The primary objective of this work was to develop an efficient and sustainable adsorbent for the removal of methylene blue (MB) from aqueous media. The anodized graphite sheet (AGS) obtained from the electrochemical treatment was systematically characterized to elucidate its physicochemical properties. The structural and morphological characteristics of the anodized graphite, known as AGS, were confirmed by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET). To evaluate the adsorption performance of AGS, kinetic studies were carried out using MB solutions under controlled conditions. The influence of electrochemical anodization on the adsorption efficiency was also examined. The results demonstrated that an anodized graphite sheet with a surface area of ۱ cm² and an effective mass of ۰.۰۴ g exhibited remarkable adsorption capability, achieving ۸۷% removal of MB dye (from ۱۵ mL of aqueous solution) within ۹۰ minutes of contact time. Consequently, AGS can be regarded as a promising, eco-friendly, and economically viable adsorbent for the remediation of dye polluted wastewater, offering a sustainable alternative to traditional chemical synthesis and adsorption methods.

کلیدواژه ها:

Dye removal ، Graphen oxide ، Graphite sheet ، Methylene blue