The bioavailability of metals from the contaminated soil was reduced even when the metal was not in an apatite phase; amount of Apatite II not very important
In stomach pH of 2 Pb (ppb) Zn (ppb) pH
soil 24,000 2,800 4.28
soil + 1% Apatite II 174 140 6.07
soil + 10% Apatite II 104 < 50 6.87
Similar behavior will occur for U and Pu
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