JEQ -- Huang et al. 36 (2): 549 Figure IG4

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Fig. 4. Typical X-ray spectra (EDXS) of Ca-rich particles of FeSul-stabilized biosolids. (A) Ca-S, gypsum; (B) Ca-P-S dominant phase, brushite & gypsum; (C) probable residual CaCO₃; and (D) probable residual CaCO₃, gypsum & brushite.