Using Synchrotron-based X-ray Absorption Spectrometry to Identify the Arsenic Chemical Forms in Mine Waste Materials

Vitukawalu P. Matanitobua, Barry N. Noller, Barry Chiswell, Jack C. Ng, Scott L. Bruce, Daphne Huang, Mark Riley, Hugh H. Harris
2007 AIP Conference Proceedings  
X-ray Absorption Near Edge Spectroscopy (XANES) gives arsenic form directly in the solid phase and has lower detection limits than extraction techniques. An important and common application of XANES is to use the shift of the edge position to determine the valence state. XANES speciation analysis is based on fitting linear combinations of known spectra from model compounds to determine the ratios of valence states and/or phases present. As(V)/As(III) ratios were determined for various
more » ... mine waste samples and dispersed mine waste samples from river/creek sediments in Vatukoula, Fiji.
doi:10.1063/1.2436430 fatcat:wohq3xfcgvfmjmj6x6zco33cn4