Molecular Characterization of Cr Phases in Contaminated Soils by Cr and Fe EXAFS : A Tool for Evaluating Chemical Remediation Strategies

Kemner, K. M.; Hunter, D. B.; Gall, E.J.; Bertsch, Paul M.; Kirkland, J. P.; Elam, W. T.

doi:10.1051/jp4:1997242

Cited by 3 publications

(1 citation statement)

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“…The application of X-Ray Absorption Spectroscopy (XAS), since the establishment of the theoretical foundation for the interpretation of its spectra (Sayers et al, 1971;Teo, 1986) has florished in environmental sciences, (e.g., Manceau et al, 1996;Hesterberg et al, 1997;Kemner et al, 1997;O'Day et al, 1998;Kim et al, 1999;Ostergren et al, 1999;Manceau et al, 2000). The first paper to mention the use of this spectroscopic tool to probe the speciation of metals in environmental samples was published about 20 years ago (Jaklevic et al, 1980).…”

Section: Introductionmentioning

confidence: 99%

Quick X-ray absorption spectroscopy for determining metal speciation in environmental samples

Gaillard¹,

Webb²,

Quintana³

2001

J Synchrotron Radiat

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We present a method for determining the chemical speciation of metals in environmental particles based on Quick-X-ray Absorption Spectroscopy. The approach can be applied to either the extended or the near edge fine structure, and consists in the decomposition of the XAS spectrum of an unknown sample on a reference set of standards' spectra using quadratic linear programming. The analysis accounts for the statistical experimental errors generated during the acquisition of X-ray absorption data, and leads to error estimates on the various fractions determined via a Monte Carlo procedure. An application example is presented for the speciation of inorganic Zn in a contaminated sediment sample.

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