فهرست نشریات علمی دسترسی آزاد ایران

The increasing contamination of aquatic environments by dye effluents poses significant challenges to water quality and public health. This review focuses on recent advancements in the use of graphene oxide (GO) and its composites as efficient adsorbents for the removal of cationic and anionic dyes from wastewater. GO’s unique properties, including its large specific surface area, abundant oxygen-containing functional groups, and adaptable surface chemistry, enable high adsorption capacities and versatile interaction mechanisms such as electrostatic attraction, hydrogen bonding, and π–π interactions. The synthesis methods of GO and its composites are discussed, with emphasis on optimization parameters like pH, contact time, and concentration. Furthermore, the review critically analyzes key adsorption performance indicators through isotherm models (Langmuir, Freundlich, Redlich-Peterson) and kinetic models (pseudo-first-order, pseudo-second-order, intraparticle diffusion). The durability and reusability of GO-based adsorbents, an essential aspect for sustainable water treatment, are also evaluated, with demonstrated maintenance of adsorption efficiency over multiple cycles. Finally, future research directions are proposed, highlighting the integration of GO-based materials with advanced treatment technologies such as membrane filtration and photocatalysis to enhance dye removal efficiency. This comprehensive review provides insights into the practical potential and challenges of deploying GO nanomaterials for large-scale, sustainable wastewater remediation applications.