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X-ray microspectroscopy and chemical reactions in soil microsites.
- Source :
-
Journal of environmental quality [J Environ Qual] 2011 May-Jun; Vol. 40 (3), pp. 667-78. - Publication Year :
- 2011
-
Abstract
- Soils provide long-term storage of environmental contaminants, which helps to protect water and air quality and diminishes negative impacts of contaminants on human and ecosystem health. Characterizing solid-phase chemical species in highly complex matrices is essential for developing principles that can be broadly applied to the wide range of notoriously heterogeneous soils occurring at the earth's surface. In the context of historical developments in soil analytical techniques, we describe applications of bulk-sample and spatially resolved synchrotron X-ray absorption spectroscopy (XAS) for characterizing chemical species of contaminants in soils, and for determining the uniqueness of trace-element reactivity in different soil microsites. Spatially resolved X-ray techniques provide opportunities for following chemical changes within soil microsites that serve as highly localized chemical micro- (or nano-)reactors of unique composition. An example of this microreactor concept is shown for micro-X-ray absorption near edge structure analysis of metal sulfide oxidation in a contaminated soil. One research challenge is to use information and principles developed from microscale soil chemistry for predicting macroscale and field-scale behavior of soil contaminants.<br /> (American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.)
- Subjects :
- Copper chemistry
North Carolina
Oxidation-Reduction
Sulfides chemistry
Synchrotrons instrumentation
Trace Elements chemistry
X-Ray Absorption Spectroscopy instrumentation
X-Ray Absorption Spectroscopy methods
Zinc chemistry
Copper analysis
Soil Pollutants analysis
Sulfides analysis
Trace Elements analysis
Zinc analysis
Subjects
Details
- Language :
- English
- ISSN :
- 0047-2425
- Volume :
- 40
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Journal of environmental quality
- Publication Type :
- Academic Journal
- Accession number :
- 21546654
- Full Text :
- https://doi.org/10.2134/jeq2010.0140