FeO NPs‐Loaded Guar Gum/Xanthan Gum‐Based Hydrogel: A Sustainable Approach for Cationic Dye Removal

Abstract In this research article, facile synthesis of iron oxide nanoparticles (FeO NPs) was done, and novel FeO NPs loaded guar gum (GG): xanthan gum (XG)‐based hydrogel has been fabricated to treat wastewater via the adsorption process. The structural and morphological properties of the optimized sample were characterized and analyzed by FTIR, PXRD, TGA, DLS, HRTEM, and SEM‐EDAX. The swelling ratio was found to be maximum (6201%) in the case of Fe3:GG:XG hydrogel nanocomposite. The gel content (%) of the hydrogel nanocomposite was found to be 86. The maximum adsorption capacity ( q max ) was calculated using the Langmuir isotherm and found to be 130 mg/g. In addition, the result revealed that the iron‐loaded hydrogel has better adsorption capacity, such as ∼97% removal of dye with 0.35 g in 90 min of contact time. Moreover, the isotherms and kinetics were fitted, and it was found that the synthesized hydrogel is best fitted in the Langmuir isotherm with pseudo‐second‐order kinetics, with the regression coefficients 0.988 and 0.998, respectively.