Remediation of Cr(VI) by biogenic magnetic nanoparticles: An x-ray magnetic circular dichroism study

被引：41
|
作者：
Telling, N. D. [1 ]
Coker, V. S. [1 ]
Cutting, R. S. [1 ]
van der Laan, G. [1 ,2 ]
Pearce, C. I. [1 ]
Pattrick, R. A. D. [1 ]
Arenholz, E. [3 ]
Lloyd, J. R. [1 ]
机构：
[1] Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester M13 9PL, Lancs, England
[2] Diamond Light Source, Magnet Spect Grp, Didcot OX11 0DE, Oxon, England
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 16期
基金：
英国工程与自然科学研究理事会; 英国生物技术与生命科学研究理事会;
关键词：
AQUEOUS CR(VI); ABSORPTION;
D O I：
10.1063/1.3249578
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Biologically synthesized magnetite (Fe(3)O(4)) nanoparticles are studied using x-ray absorption and x-ray magnetic circular dichroism following exposure to hexavalent Cr solution. By examining their magnetic state, Cr cations are shown to exist in trivalent form on octahedral sites within the magnetite spinel surface. The possibility of reducing toxic Cr(VI) into a stable, nontoxic form, such as a Cr(3+)-spinel layer, makes biogenic magnetite nanoparticles an attractive candidate for Cr remediation. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3249578]
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页数：3
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