Mechanism for microwave degradation of Methylene Blue and Arsenazo(III) dyes using graphene oxide synthesized from date pits

Many methods, such as biodegradation, ultra-filtration, photocatalytic degradation, oxidation, and adsorption, have been used in wastewater treatment. Adsorption is a conventional wastewater treatment technique that is comparatively cheap and efficient. The aim of this work is to determine the effectiveness of degradation of a novel technique of microwave radiation against methylene blue (MB) dye and arsenazo III dye using graphene oxide (GO) synthesized from Saudi date pits. The conversion of date pits to GO takes place first through two steps, the conversion of date pits to active carbon and then to GO. The characteristics of the samples were scanning electron microscopy, Fourier transform/Raman, Surface, Fourier transformation infrared spectroscopy, X-ray diffraction, and ultraviolet-visible absorption. MB and Arsenazo III dyes degradation was monitored as a function of irradiation time by measuring maximum absorbance. Measurements were taken for chemical oxygen demand (COD) and biological oxygen demand (BOD). Kinetic models was studied via pseudo-first-order, pseudo-second-order, and elovich. It was found that both chemical and surface adsorption mechanisms are participating in the studied systems.