Qin, N., Carter, L. orcid.org/0000-0002-1146-7920, Zhou, Y. et al. (1 more author) (2025) Purification of Pb2+ in water by magnetic strontium hydroxyapatite nanorods. Solid State Sciences, 167. 107979. ISSN 1293-2558
Abstract
In this study, magnetic hydroxyapatite nanorods Sr5(PO4)3(OH)/Fe3O4, called FSP for short, with different magnetic contents were synthesized by one-step hydrothermal method. FSP materials were then investigated as effective adsorbents for adsorption of Pb2+ from aqueous solution. FSP materials with 2 wt% magnetic content (denoted as FSP2) exhibited high magnetic separation efficiency and Pb2+ removal capacity. Then, FSP2 were further characterized by SEM, EDS, XRD, PPMS, BET, and Zeta potential. FSP2 demonstrated a leaching rate of ∼5 % at pH 5, indicating excellent chemical stability in aqueous environments. Effects of two influence parameters (temperature and material dosage) were studied and the optimized adsorption conditions were 25 °C and material dosage of 0.05 g. The kinetic and isotherm data accorded with the pseudo-second-order kinetic model and Temkin model, respectively. The EDS and XRD results of mechanism study indicated that the adsorption of Pb2+ involves ion exchange and surface adsorption. Ion exchange Pb2+ for Sr2+ was predominant. The results of application research showed that the adsorption capacity of Pb2+ by FSP2 in environmental water samples was all higher than 600 mg g−1. Due to their easy preparation method and good adsorption capability, magnetic FSP2 are regarded as promising composite materials for the adsorption of Pb2+ from solutions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Lead ion, Adsorption, Magnetic phosphate nanocomposites, Different magnetic content, Water treatment, Pb2+ |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Geography (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Jul 2025 09:23 |
Last Modified: | 04 Jul 2025 09:23 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.solidstatesciences.2025.107979 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:228598 |