Abstract
Resource recycling has taken center stage of global carbon neutrality. In this study, we reclaimed spent graphite (SG) from retired lithium-ion batteries (LIBs) and introduced potassium permanganate powder to prepare amorphous MnO2 loaded graphite oxide (AMO@GO) via one-step mechanochemical method for heavy metals adsorption. The synthesized AMO@GO was characterized by X-ray diffraction (XRD), Raman spectra, X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller Method (BET), Fourier Transform Infrared Spectrometer (FTIR), and Scanning Electron Microscope (SEM), which illustrated AMO@GO had richer pore structure, ample active groups, strong surface ion exchange activity. These properties made AMO@GO a highly potential adsorbent for aqueous heavy metal contamination. The results showed the adsorption capacities of AMO@GO for Cu2+, Pb2+ and Cd2+ in the water body can reach 233.99 mg/g, 353.13 mg/g and 257.95 mg/g respectively (calculated by Langmuir isotherm model), significantly higher than similar graphite-based adsorbents. Through in-depth studies of the adsorption mechanism, we found that the ion exchange of heavy metals with active groups on the surface of graphite oxide and amorphous MnO2 was the main source of sample adsorption capacity.
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 callDisclaimer: 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.
