Environmental Geology

, Volume 41, Issue 1, pp 1–10

Effect of phosphate treatment on the solubility of lead in contaminated soil

Authors

  • R. Stanforth
    • Chemical and Environmental Engineering Department, National University of Singapore,10 Kent Ridge Crescent, 119260-Singapore
  • J. Qiu
    • Chemical and Environmental Engineering Department, National University of Singapore,10 Kent Ridge Crescent, 119260-Singapore
Research Article

DOI: 10.1007/s002540100262

Cite this article as:
Stanforth, R. & Qiu, J. Env Geol (2001) 41: 1. doi:10.1007/s002540100262

Abstract.

Lead-contaminated soil was used for treatment testing with phosphate-based additives. Reactions controlling leached lead concentrations from soil before and after phosphate treatment were evaluated. The concentration of lead from untreated soil is controlled by a desorption reaction from hydrous metal oxides. Phosphate addition reduced lead solubility in the acidic pH range, but not in the alkaline range. The addition of chloride further reduced lead solubility. The phosphate-treated soil released lower concentrations of lead in simulated digestion tests.

Lead solubility Treatment Phosphate Pyromorphite

Copyright information

© Springer-Verlag 2001