Abstract
Nitrogen doping hydrothermal carbon material (NHTC) is an important metal ion adsorbent. In this work, NHTC with Schiff base structures (NHTC-SBS) was successfully synthesized via ammonia-assisted hydrothermal treatment of industrial hemicelluloses and used for the adsorption of toxic hexavalent chromium Cr(VI). The formation of Schiff base structures depends on the reaction between ammonia and furfural resulting from hemicelluloses hydrolysis. The morphology and structures of NHTC-SBS were characterized by SEM, XRD, BET, XPS and zeta potential. The results of adsorption experiments suggested that a high adsorption capacity of NHTC-SBS towards Cr(VI) was achieved at 349.6 mg/g according to Langmuir isotherm model under 298 K and pH 2.0. The adsorption of Cr(VI) on NHTC-SBS mainly depended on electrostatic attraction, redox, and chelation between nitrogen-containing groups (amino, Schiff base structures, heterocyclic nitrogen) and Cr(VI). This work provides a facial, green, and economical route to synthesize biochar with great adsorption performance.
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.
