Fig. 7. Toxicity Characteristic Leaching Procedure (TCLP)–extractable U (A) and Ni (B) for contaminated soil amended with calcium–phytate precipitate (Ca_n–IP6), dodeca sodium–phytate (Na₁₂–IP6), and hydroxyapatite (HA). In C and D, the TCLP extractable U and Ni values were corrected for metal removal during the initial equilibration phase of the study and reported on a soil mass basis.