Graphene oxide nanoparticles a remedy for chromium pollution

Chromium (Cr) the most widespread metal is generally found in rocks, animals and plants, while its entrance to the environment occurs from industrial processes e.g. oxidative dyeing, steel works, tanning industries, and chemical industries etc. The study aims were Graphene oxide nanoparticles (GO-NPs) preparation and its evaluation for chromium six (Cr⁺⁶) removal from water as well as the assessment of the effect of various factors (pH, temperature, contact time etc) over Cr⁺⁶ adsorption. The target adsorbent was prepared by Modified Hummer's method and then it was treated with sodium borohydride (NaBH₄) for the synthesis of GO-NPs. The characterization was done by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The results indicated that highest removal (92%) was observed at pH 3 and it was concluded that the nanoparticles were efficient for Cr⁺⁶ adsorption from water. The research work was productive in estimation and optimization of different parameters for the removal of Cr⁺⁶ by GO-NPs. Further chemical modification and activation of the adsorbent is recommended.