fingerprint”, i.e., identification of a characteristic chemical profile based on the
content of the selected elements and their mutual ratios.
33.3.2.2 Electron Microscopy
The advanced microscopic techniques, such as field emission gun scanning electron
microscopy (FE-SEM) and transmission electron microscopy (TEM), enable the
visualization of nZVI particles and their transformation products directly after their
separation from sediment (see Figs. 33.9 and 33.10). For SEM/TEM as well as for
Fig. 33.9 FE-SEM
micrograph of the sediment
sample showing nZVI
transformation products
Fig. 33.10 TEM
micrograph of the sediment
sample displaying nZVI
particles surrounded by their
transformation products
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P. Skácelová and J. Filip