Iron oxide nano-adsorbent doped with nickel and palladium for phosphorus removal from water
Files
(Published version)
Date
2025
Authors
Sepulveda, P.
Suazo Hernandez, J.
Caceres Jensen, L.
Mora, M.D.L.L.
Denardin, J.
Garcia Garcia, A.
Cornejo, P.
Sarkar, B.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
RSC Advances, 2025; 15(32):26321-26337
Statement of Responsibility
Conference Name
Abstract
Excessive phosphorus (P) in surface and ground water can cause serious environmental issues. This study aims to synthesize and characterize novel iron oxides (FexOy) nanoparticles (NPs) with and without Ni and Ni–Pd doping and unravel the NPs' performance and mechanism for P removal from water. X-ray diffraction, energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy results confirmed successful doping of Ni and Ni–Pd on FexOy NPs. FexOy–Ni NPs exhibited a higher specific surface area and isoelectric point than FexOy and FexOy–Ni–Pd NPs.
The kinetic data for P adsorption on FexOy NPs fitted to the pseudo-first order model and FexOy–Ni and FexOy–Ni–Pd NPs fitted to the pseudo-second order model. Adsorption isotherm data for FexOy NPs fitted to the Freundlich model and FexOy–Ni and FexOy–Ni–Pd NPs fitted to the Langmuir model. The maximum P adsorption capacity was the highest for FexOy–Ni (35.66 mg g−1) followed by FexOy–Ni–Pd (30.73 mg g−1) and FexOy NPs (21.97 mg g−1), which was opposite to the P desorption order of these adsorbents. The adsorption and characterization analysis suggested that inner-sphere complexes and co-precipitation were the key mechanisms for P adsorption on FexOy–Ni and FexOy–Ni–Pd NPs. Therefore, FexOy–Ni NPs were a highly effective adsorbent for removing P from water.
School/Discipline
Dissertation Note
Provenance
Description
Data source: Supplementary information, https://doi.org/10.1039/D5RA02256H
Access Status
Rights
Copyright 2025. The Author(s).