Abstract
In recent years, pharmaceutical pollutants are regularly detected in wastewater. An urgent initiative for controlling and removal of pharmaceutical contaminants from water is needed. Herein, graphene oxide/halloysite nanotubes @polyaniline (GO/HNT@PANI) nanohybrid has been synthesized and employed as an adsorbent for the removal of diclofenac sodium (DS) from an aqueous solution. The experimental parameters, including variation in pH, contact time, concentration, and temperature were optimized for the removal of DS. The prepared materials were characterized using SEM, HR-TEM, EDX, XRD, BET, and FTIR techniques. The highest decontamination of DS (633.680 mg g−1) was achieved within 60 min at pH 3.0 The kinetic data were best fitted to the pseudo-first-order kinetics. The adsorption equilibrium data were fitted to non-linear Langmuir, Freundlich, and Temkin models and the results revealed that the Langmuir model is the best-fitted isotherm. The thermodynamic study exhibited a spontaneous endothermic adsorption process. The nanohybrid exhibited highly improved adsorptive uptake contrasting to the other reported adsorbents. The adsorption of DS occurred through hydrogen bonding, π–π electron donor-acceptor, and electrostatic interactions. Moreover, the nanohybrid demonstrated its regenerative capability up to five times without any significant loss by simple washing with 0.1 mol L−1(aq) ethanol. The results revealed that GO/HNT@PANI nanohybrid is a highly efficient material for the removal of emerging pharmaceutical pollutants in water.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Environmental Nanotechnology, Monitoring & Management
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
