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Figure 1
Micro-XRF images of As [before and after a 0.1 mM As(V) treatment] and soil matrix elements (before treatment) collected on the SRX beamline, along with TOF-SIMS images of Fe and Al collected on the As(V) treated sand grain. These images represent ROI-100, which had visible Fe-oxide coatings (Fig. S1). In µ-XRF images, scale bars show that brighter colors in the image represent greater natural log-transformed fluorescence signals for a given element in imaged soil volumes (microsites), and the linear scale bar in TOF-SIMS images indicates greater ion counts. The red square in the As image after treatment delineates ROI-10a, a 10 µm × 10 µm sub-region of ROI-100.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 6| November 2019| Pages 1967-1979
https://doi.org/10.1107/S1600577519012785
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