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Rapid and highly efficient preconcentration of Eu(III) by core-shell structured Fe3O4@humic acid magnetic nanoparticles.
ACS Appl Mater Interfaces. 2012 Dec; 4(12):6891-900.AA

Abstract

In this study, humic acid-coated Fe(3)O(4) magnetic nanoparticles (Fe(3)O(4)@HA MNPs) were synthesized using a chemical coprecipitation method and characterized in detail. The XRD analysis results showed that HA coating did not change the phase of Fe(3)O(4) cores. The TEM image suggested that Fe(3)O(4)@HA MNPs had nearly uniform size without the observation of aggregation. The Fe(3)O(4)@HA MNPs were stable in solution and could be easily separated from aqueous solution using a magnetic separation method. A batch technique was adopted to investigate the removal efficiency of Fe(3)O(4)@HA MNPs toward Eu(III) under various environmental conditions. The kinetic process of Eu(III) sorption on Fe(3)O(4)@HA MNPs reached equilibrium within <30 min. The fast sorption kinetics and high sorption amount were attributed to the plentiful surface sites provided by the surface-coated HA macromolecules. The Fe(3)O(4)@HA MNPs was able to remove ~99% of Eu(III) in aqueous solution at pH 8.5. Except for SO(4)(2-) anions, the coexisting electrolyte ions had no significant competition effects on the removal of Eu(III) by Fe(3)O(4)@HA MNPs. The obvious sorption-desorption hysteresis suggested that the removal of Eu(III) was dominated by inner-sphere surface complexation. The sorption isotherm agreed well with the Langmuir model, having a maximum sorption capacity of 6.95 × 10(-5) mol g(-1). The leaching test showed that the Eu(III)-loaded Fe(3)O(4)@HA colloids were capable to maintain high thermodynamic stability for long aging times. The findings herein suggested that Fe(3)O(4)@HA MNPs could be potentially used as a highly effective material for the enrichment and preconcentration of radionuclide Eu(III) or other trivalent lanthanides/actinides in geological repositories or in nuclear waste management.

Authors+Show Affiliations

Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031, Hefei, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23182180

Citation

Yang, Shitong, et al. "Rapid and Highly Efficient Preconcentration of Eu(III) By Core-shell Structured Fe3O4@humic Acid Magnetic Nanoparticles." ACS Applied Materials & Interfaces, vol. 4, no. 12, 2012, pp. 6891-900.
Yang S, Zong P, Ren X, et al. Rapid and highly efficient preconcentration of Eu(III) by core-shell structured Fe3O4@humic acid magnetic nanoparticles. ACS Appl Mater Interfaces. 2012;4(12):6891-900.
Yang, S., Zong, P., Ren, X., Wang, Q., & Wang, X. (2012). Rapid and highly efficient preconcentration of Eu(III) by core-shell structured Fe3O4@humic acid magnetic nanoparticles. ACS Applied Materials & Interfaces, 4(12), 6891-900. https://doi.org/10.1021/am3020372
Yang S, et al. Rapid and Highly Efficient Preconcentration of Eu(III) By Core-shell Structured Fe3O4@humic Acid Magnetic Nanoparticles. ACS Appl Mater Interfaces. 2012;4(12):6891-900. PubMed PMID: 23182180.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rapid and highly efficient preconcentration of Eu(III) by core-shell structured Fe3O4@humic acid magnetic nanoparticles. AU - Yang,Shitong, AU - Zong,Pengfei, AU - Ren,Xuemei, AU - Wang,Qi, AU - Wang,Xiangke, Y1 - 2012/12/10/ PY - 2012/11/28/entrez PY - 2012/11/28/pubmed PY - 2012/11/28/medline SP - 6891 EP - 900 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 4 IS - 12 N2 - In this study, humic acid-coated Fe(3)O(4) magnetic nanoparticles (Fe(3)O(4)@HA MNPs) were synthesized using a chemical coprecipitation method and characterized in detail. The XRD analysis results showed that HA coating did not change the phase of Fe(3)O(4) cores. The TEM image suggested that Fe(3)O(4)@HA MNPs had nearly uniform size without the observation of aggregation. The Fe(3)O(4)@HA MNPs were stable in solution and could be easily separated from aqueous solution using a magnetic separation method. A batch technique was adopted to investigate the removal efficiency of Fe(3)O(4)@HA MNPs toward Eu(III) under various environmental conditions. The kinetic process of Eu(III) sorption on Fe(3)O(4)@HA MNPs reached equilibrium within <30 min. The fast sorption kinetics and high sorption amount were attributed to the plentiful surface sites provided by the surface-coated HA macromolecules. The Fe(3)O(4)@HA MNPs was able to remove ~99% of Eu(III) in aqueous solution at pH 8.5. Except for SO(4)(2-) anions, the coexisting electrolyte ions had no significant competition effects on the removal of Eu(III) by Fe(3)O(4)@HA MNPs. The obvious sorption-desorption hysteresis suggested that the removal of Eu(III) was dominated by inner-sphere surface complexation. The sorption isotherm agreed well with the Langmuir model, having a maximum sorption capacity of 6.95 × 10(-5) mol g(-1). The leaching test showed that the Eu(III)-loaded Fe(3)O(4)@HA colloids were capable to maintain high thermodynamic stability for long aging times. The findings herein suggested that Fe(3)O(4)@HA MNPs could be potentially used as a highly effective material for the enrichment and preconcentration of radionuclide Eu(III) or other trivalent lanthanides/actinides in geological repositories or in nuclear waste management. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/23182180/Rapid_and_highly_efficient_preconcentration_of_Eu_III__by_core_shell_structured_Fe3O4@humic_acid_magnetic_nanoparticles_ L2 - https://dx.doi.org/10.1021/am3020372 DB - PRIME DP - Unbound Medicine ER -
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