Figure 2
(a) As K-edge XANES spectra and (b) the corresponding LCF results for the partially aerated As(III)-reacted FeS at pH 5 using a He flow sample chamber. The samples that did not undergo redox transformation are represented by single spectra, and those undergoing the photo-oxidation are represented by a series of successive scans. The beam exposure time was about 37 min per scan in a series of multiple scans. |