Hidalgo, K. T. S. and Guzman-Blas, R. and Ortiz-Quiles, E. O. and Fachini, E. R. and Corchado-Garcia, J. and Larios, E. and Zayas, B. and Jose-Yacaman, M. and Cabrera, C. R.. (2015) Highly organized nanofiber formation from zero valent iron nanoparticles after cadmium water remediation. Rsc Advances, 5 (4). pp. 2777-2784.Full text not available from this repository.
' Many studies have used nanoscale zero valent iron (nZVI) nanoparticles to remove redox-sensitive metals (e. g., As, Cr, U, Se, Ni, Cu) from aqueous systems by absorption or reduction processes. However, very few investigations present a detailed study of the product formed after the remediation process. In order to quantify the efficiency of nZVI particles as a possible cadmium remediation agent, we prepared nZVI by sodium borohydride reduction of an iron complex, FeCl3 center dot 6H(2)O, at room temperature and ambient pressure. Fe-0 and nanocrystalline structures of iron oxides and oxyhydroxides were obtained with this method. We exposed the nZVI to 6 ppm of Cd2+ and characterized the products with X-ray diffraction, X-ray absorption and X-ray photoelectron spectroscopy. Inductively coupled plasma analysis showed that the nZVI remediation efficiency of cadmium ions was between 80% and 90% in aqueous media. All of the physical characterization results confirmed the presence of Fe-0, a-Fe2O3 and FeOOH. High resolution transmission electron microscopy images showed nanofiber formation of a mixture of Fe-0, oxyhydroxides and oxides iron formed after interacting with cadmium ions, possibly forming CdFe2O4. These results suggest that the FeOOH shell and other iron oxides in nZVI could enhance Cd2+ removal. This removal is observed to cause a change of the initial structure of nZVI to nanofibers due to possible formation of CdFe2O4 as a waste product.
|Additional Information:||ISI Document Delivery No.: AW3LOTimes Cited: 0Cited Reference Count: 46Hidalgo, Keyla T. Soto Guzman-Blas, Rolando Ortiz-Quiles, Edwin O. Fachini, Estevao Rosim Corchado-Garcia, Juan Larios, Eduardo Zayas, Beatriz Jose-Yacaman, Miguel Cabrera, Carlos R.jose yacaman, miguel/B-5622-2009NASA-URC NNX10AQ17A; NSF-NSEC Center for Hierarchical Manufacturing CHM-CMMI-0531171; NSF PREM DMR-0934218; Welch Foundation Agency AX-1615; NSF DMR-1103730; U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences DEAC02- 98CH10886The authors acknowledge the use of facilities of the Materials Characterization Center of the University of Puerto Rico. We would like to thank Dr Lisandro Cunci (UPR) and Josue Ortiz for the XRD and XPS analysis. This work had financial support of NASA-URC Grant no. NNX10AQ17A. Financial support of the NSF-NSEC Center for Hierarchical Manufacturing, Grant no. CHM-CMMI-0531171, is also gratefully acknowledged. The authors of this work would like to thank the NSF PREM Grant no. DMR-0934218, Title: Oxide and Metal Nanoparticles. The Interface between life sciences and physical sciences. The authors would also like to acknowledge The Welch Foundation Agency Project \# AX-1615, `` Controlling the Shape and Particles Using Wet Chemistry Methods and Its Application to Synthesis of Hollow Bimetallic Nanostructures'' and to NSF for its support through Grants DMR-1103730, `` Alloys at the Nanoscale: The Case of Nanoparticles Second Phase''. Use of the National Synchrotron Light Source, Brookhaven National Laboratory, was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract no. DEAC02- 98CH10886.0Royal soc chemistryCambridge|
|Collections:||Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing|
|Depositing User:||Robert Stevens|
|Date Deposited:||12 Nov 2015 18:38|
|Last Modified:||12 Nov 2015 18:38|
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