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Fig. 5. Transmission electron microscope (TEM) micrographs of (A) fine-grained secondary Al/Fe-phosphate precipitates (40K magnification), (B) fine-grained, lath-shaped residual hydroxyapatite (HA) (50K magnification), and (C) typical energy dispersive x-ray (EDXA) spectrum of Ni- and U-rich secondary Al/Fe-phosphate precipitates in sediment S1 amended with 50 g kg-1 HA.
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