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Spectroscopic and Microspectroscopic Investigation of Arsenic Speciation and Distribution in Mine Wastes

Residential developments near former mining regions in southern California face potential environmental and health risks due to the weathering of arsenic-bearing deposits and mine wastes. Fine-grained particles possessing elevated concentrations of arsenic from these areas can be easily transported by water and dispersed by wind. Understanding the speciation of arsenic is essential to evaluating mobility and geoavailability because certain species of arsenic are more toxic and mobile than others. Speciation involves identifying the composition and relative proportions of chemical compounds present within a sample.