Formation of chloropyromorphite in a lead-contaminated soil amended with hydroxyapatite.

@article{Ryan2001FormationOC,
  title={Formation of chloropyromorphite in a lead-contaminated soil amended with hydroxyapatite.},
  author={J. A. Ryan and Pengyi Zhang and Dean H Hesterberg and Jeff W. Chou and Dale E Sayers},
  journal={Environmental science & technology},
  year={2001},
  volume={35 18},
  pages={3798-803}
}
Conversion of soil Pb to pyromorphite [Pb5(PO4)3Cl] was evaluated by reacting a Pb contaminated soil collected adjacent to a historical smelter with hydroxyapatite [Ca5(PO4)3OH]. In a dialysis experiment where the soil and hydroxyapatite solids were placed in separate dialysis bags suspended in 0.01 M NaNO3 solution a crystalline precipitate, identified as chloropyromorphite, formed on the dialysis membrane containing the soil. The aqueous composition of the solution indicated that dissolution… CONTINUE READING

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