XAS Studies of Arsenic in the Environment

Arsenic is present in low concentrations in much of the Earth's crust and changes in its speciation are vital to understanding its transport and toxicity in the environment. We have used X-ray absorption spectroscopy to investigate the coordination sites of arsenic in a wide variety of samples,...

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Bibliographic Details
Main Authors: Charnock, J M, Polya, D A, Gault, A G, Morgan, A J
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION
ABSORPTION SPECTROSCOPY
ANNELIDS
ARSENIC
CAMBODIA
CHEMICAL STATE
EARTH CRUST
ENVIRONMENTAL MATERIALS
FINE STRUCTURE
HAIR
HUMAN POPULATIONS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
NAILS
POLLUTION
SOILS
TOXICITY
X-RAY SPECTRA
X-RAY SPECTROSCOPY
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Summary:Arsenic is present in low concentrations in much of the Earth's crust and changes in its speciation are vital to understanding its transport and toxicity in the environment. We have used X-ray absorption spectroscopy to investigate the coordination sites of arsenic in a wide variety of samples, including soil and earthworm tissues from arsenic-contaminated land, and human hair and nail samples from people exposed to arsenic in Cambodia. Our results confirm the effectiveness of using X-ray absorption near edge structure (XANES) and X-ray absorption fine structure (EXAFS) spectroscopy to determine speciation changes in environmental samples.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2644477