2008
DOI: 10.1016/j.jcis.2008.01.033
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Arsenic speciation in multiple metal environments

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Cited by 34 publications
(9 citation statements)
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References 35 publications
(46 reference statements)
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“…As-Cu distances at 3.20 and 3.38 Å were indicative of corner-sharing arrangements between As and Cu. Similar As-Cu distances are observed in homogeneously precipitated copper-arsenate species [24], which assume clinoclase-like structure, but the magnitude of N in the present samples was lower. The magnitude of the coordination numbers suggested that a skewed bidentate binuclear complex to one Cu atom at 3.20 Å and one Cu atom at 3.38 Å had formed.…”
Section: As K-edge Exafssupporting
confidence: 84%
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“…As-Cu distances at 3.20 and 3.38 Å were indicative of corner-sharing arrangements between As and Cu. Similar As-Cu distances are observed in homogeneously precipitated copper-arsenate species [24], which assume clinoclase-like structure, but the magnitude of N in the present samples was lower. The magnitude of the coordination numbers suggested that a skewed bidentate binuclear complex to one Cu atom at 3.20 Å and one Cu atom at 3.38 Å had formed.…”
Section: As K-edge Exafssupporting
confidence: 84%
“…All data reduction was performed with WinXAS 2.3 and later versions [22] using standard procedures described elsewhere [23,24]. Briefly, individual energy spectra were corrected for shifts in edge energy and a pre-and post-edge background was subtracted from the energy functions for normalization prior to averaging.…”
Section: Exafs Data Analysismentioning
confidence: 99%
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“…3). The minimum number of principal components (PCs) in the 46-spectra data set, including the whole soil spectra and all ROIs, was determined by calculating marginal improvements of the total goodness of fit (NSS-total) because the IND value (Malinowski, 1977) did not reach a minimum within the first 10 components ( Supplemental Table S1) (Gräfe et al, 2008). Using NSS-total, we identified two primary components because both PC1 and PC2 improved the fit to a large extent (99 and 85%, respectively), whereas PC3 and subsequent PCs only improved the fit by ~50% or less ( Supplemental Table S1).…”
Section: Synchrotron Microprobe Analysismentioning
confidence: 99%
“…This latter case requires a synchrotron source in the absorption operation mode (X‐ray absorption near edge structure), which is an expensive, slow and hardly accessible method 12–14. The second alternative is based on conventional bench‐top equipment with X‐ray tubes, such as the one used in this work (XRF), but it is done by an indirect route, that is, it requires that the chromium species be physically separated before sample irradiation 8, 15…”
Section: Introductionmentioning
confidence: 99%