Fig. 4: EPMA and EDS microanalysis of arsenic-bearing minerals in reclaimed soils.
From: Unstable geogenic arsenic in reclaimed coastal soils poses environmental risks
a Fe (hydr)oxides: ferrihydrite and goethite. b Fe sulfides: arsenian pyrite and arsenopyrite. c Phyllosilicates: biotite and chlorite. Each group: BSE images, As/Fe/S element maps and EDS spectra. Element maps: Brighter colors indicate higher concentrations. EDS spectra: Major characteristic peaks identified.
