Hydroxyapatite derived from eggshell embedded on functionalized g-C 3 N 4 for synergistic extraction of U(VI) from aqueous solution.

Autor: Dhanasekaran A; Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Chennai, 600127, Tamil Nadu, India., Priyadarshini N; Department of Chemistry, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India., Perumal I; Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Chennai, 600127, Tamil Nadu, India. Electronic address: ilaiyaraja.perumal@vit.ac.in., Suresh G; Department of Physics, Aarupadai Veedu Institute of Technology, Vinayaka Mission's Research Foundation (DU), Chennai, 603104, Tamil Nadu, India., Sagadevan S; Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, Universiti of Malaya, 50603, Kuala Lumpur, Malaysia; Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, Tamil Nadu, 603103, India.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Sep; Vol. 364, pp. 143018. Date of Electronic Publication: 2024 Aug 05.
DOI: 10.1016/j.chemosphere.2024.143018
Abstrakt: In this paper, we report hydroxyapatite derived from egg-shell biowaste embedded on diglycolamic acid functionalized graphitic carbon nitride nanocomposite (abbreviated as HAp@D-gCN). The compositional and morphological characteristics of HAp@D-gCN were evaluated using scanning electron microscope, X-ray diffraction, BET, FTIR techniques and surface charge using zeta potential measurement. The sorption of U(VI) species on HAp@D-gCN was investigated through batch studies as a function of pH, contact time, initial U(VI) concentration, adsorbent dosage and ionic strength. The adsorption of U(VI) onto HAp@D-gCN was confirmed by FTIR, XRD and EDS elemental mapping. Adsorption kinetics follow pseudo second order model and it attains equilibrium within 20 min. Adsorption isotherm data correlates well with Langmuir isotherm model with a maximum sorption capacity of 993.6 mg of U(VI) per gram of HAp@D-gCN at 298K. U(VI) can be leached from the loaded adsorbent using 0.01 M Na 2 CO 3 as desorbing agent and its sorption capacity remains unaffected even after 4 adsorption-desorption cycles. Hence, the present study reveals that HAp@D-gCN nanocomposite could serve as an environmental friendly material with potential application in environmental remediation.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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