Engineering Nanoscale Iron Oxides for Uranyl Sorption and Separation: Optimization of Particle Core Size and Bilayer Surface Coatings
Abstract
Herein, we describe engineered superparamagnetic iron oxide nanoparticles (IONPs) as platform materials for enhanced uranyl (UO22+) sorption and separation processes under environmentally relevant conditions. Specifically, monodispersed 8-25 nm iron oxide (magnetite, Fe3O4) nanoparticles with tailored organic acid bilayered coatings have been systematically evaluated and optimized to bind, and thus remove, uranium from water. The combined nonhydrolytic synthesis and bilayer phase transfer material preparation methods yield highly uniform and surface tailorable IONPs, which allow for direct evaluation of the size-dependent and coating-dependent sorption capacities of IONPs. Optimized materials demonstrate ultrahigh sorption capacities (>50% by wt/wt) at pH 5.6 for 8 nm oleic acid (OA) bilayer and sodium monododecyl phosphate (SDP) surface-stabilized IONPs. Synchrotron-based X-ray absorption spectroscopy shows that iron oxide core particle size and stabilizing surface functional group(s) substantially affect U(VI)-removal mechanisms, specifically the ratio of uptake via adsorption versus reduction to U(IV). Taken together, tunable size and surface functionality, high colloidal stability, and favorable affinity toward uranium provide distinct synergistic advantage(s) for the application of bilayered IONPs as part of the next-generation material-based uranium recovery, remediation, and sensing technologies
- Authors:
-
;
- U.S. Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, Mississippi 39180, United States
- Publication Date:
- Research Org.:
- Washington Univ., St. Louis, MO (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1415163
- Alternate Identifier(s):
- OSTI ID: 1356408; OSTI ID: 1508035
- Grant/Contract Number:
- SC0006857
- Resource Type:
- Published Article
- Journal Name:
- ACS Applied Materials and Interfaces
- Additional Journal Information:
- Journal Name: ACS Applied Materials and Interfaces Journal Volume: 9 Journal Issue: 15; Journal ID: ISSN 1944-8244
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; bilayer surface coating; critical coagulation concentration; environmental remediation; iron oxide nanoparticles (IONPs); nanoparticle stability; uranium reduction; uranium sorption; XAFS; iron oxide nanoparticles (IONPs), nanoparticle stability, bilayer surface coating, critical coagulation concentration, uranium sorption, uranium reduction, environmental remediation, XAFS
Citation Formats
Li, Wenlu, Troyer, Lyndsay D., Lee, Seung Soo, Wu, Jiewei, Kim, Changwoo, Lafferty, Brandon J., Catalano, Jeffrey G., and Fortner, John D. Engineering Nanoscale Iron Oxides for Uranyl Sorption and Separation: Optimization of Particle Core Size and Bilayer Surface Coatings. United States: N. p., 2017.
Web. doi:10.1021/acsami.7b01042.
Li, Wenlu, Troyer, Lyndsay D., Lee, Seung Soo, Wu, Jiewei, Kim, Changwoo, Lafferty, Brandon J., Catalano, Jeffrey G., & Fortner, John D. Engineering Nanoscale Iron Oxides for Uranyl Sorption and Separation: Optimization of Particle Core Size and Bilayer Surface Coatings. United States. https://doi.org/10.1021/acsami.7b01042
Li, Wenlu, Troyer, Lyndsay D., Lee, Seung Soo, Wu, Jiewei, Kim, Changwoo, Lafferty, Brandon J., Catalano, Jeffrey G., and Fortner, John D. Tue .
"Engineering Nanoscale Iron Oxides for Uranyl Sorption and Separation: Optimization of Particle Core Size and Bilayer Surface Coatings". United States. https://doi.org/10.1021/acsami.7b01042.
@article{osti_1415163,
title = {Engineering Nanoscale Iron Oxides for Uranyl Sorption and Separation: Optimization of Particle Core Size and Bilayer Surface Coatings},
author = {Li, Wenlu and Troyer, Lyndsay D. and Lee, Seung Soo and Wu, Jiewei and Kim, Changwoo and Lafferty, Brandon J. and Catalano, Jeffrey G. and Fortner, John D.},
abstractNote = {Herein, we describe engineered superparamagnetic iron oxide nanoparticles (IONPs) as platform materials for enhanced uranyl (UO22+) sorption and separation processes under environmentally relevant conditions. Specifically, monodispersed 8-25 nm iron oxide (magnetite, Fe3O4) nanoparticles with tailored organic acid bilayered coatings have been systematically evaluated and optimized to bind, and thus remove, uranium from water. The combined nonhydrolytic synthesis and bilayer phase transfer material preparation methods yield highly uniform and surface tailorable IONPs, which allow for direct evaluation of the size-dependent and coating-dependent sorption capacities of IONPs. Optimized materials demonstrate ultrahigh sorption capacities (>50% by wt/wt) at pH 5.6 for 8 nm oleic acid (OA) bilayer and sodium monododecyl phosphate (SDP) surface-stabilized IONPs. Synchrotron-based X-ray absorption spectroscopy shows that iron oxide core particle size and stabilizing surface functional group(s) substantially affect U(VI)-removal mechanisms, specifically the ratio of uptake via adsorption versus reduction to U(IV). Taken together, tunable size and surface functionality, high colloidal stability, and favorable affinity toward uranium provide distinct synergistic advantage(s) for the application of bilayered IONPs as part of the next-generation material-based uranium recovery, remediation, and sensing technologies},
doi = {10.1021/acsami.7b01042},
journal = {ACS Applied Materials and Interfaces},
number = 15,
volume = 9,
place = {United States},
year = {Tue Apr 04 00:00:00 EDT 2017},
month = {Tue Apr 04 00:00:00 EDT 2017}
}
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https://doi.org/10.1021/acsami.7b01042
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