Graphene oxide dots-loaded chitin flask: A sustainable adsorbent for separating multiple dyes from water

Abstract

This research endeavors to comprehensively explore the sorption dynamics of dyes from aqueous solutions utilizing a graphene oxide-chitin (GO-chitin) biosorbent. The investigation systematically evaluates the influence of key parameters, including temperature, pH, duration of contact, and initial dye doses, on the sorption efficiency of the biosorbent. Results obtained indicated that at acidic pH range, the dye removal efficacy was more than 80% for methyl orange and Remazol Brilliant Blue. Maximum removal efficacy was achieved within the 30 min of adsorption studies. Notably, the study underscores the remarkable adsorption capacity of GO-chitin, varies in the range of 75% and 95%, for all three dyes, positioning it as a highly promising material for the remediation of polluted aquatic environments. The adsorption follows pseudo-second-order kinetics and Freundlich isotherm. These findings contribute valuable insights into the potential application of GO-chitin as an effective biosorbent in the context of wastewater treatment, emphasizing its role in addressing environmental challenges associated with dye contamination in aqueous systems.