Quantitative Energy-Dispersive Analysis of Lead Haiide Particles from the Phoenix Urban Aerosol

J. E. Post, P R Buseck

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Quantitative energy-dispersive spectrometry X-ray analyses (±10%) were performed on approximately 300 Pb halide particles (0.2-2 μm in diameter) from the Phoenix aerosol. The most abundant species appears to be α-2PbBrCl-NH4Cl, comprising about one-third of the total particles. Other compounds identified are PbBrCl, (PbO)2-PbBrCl, and probably 3Pb3(PO4)2.PbBrCl. Particles having compositions different from previously reported atmospheric Pb haiide compounds might represent mixed phases or as yet unidentified species. Only about 5% of the particles have Br/C1 molar ratios > 1.0, and no particles with only Br and Pb were observed. It is suggested that Br loss occurs from atmospheric Pb halides having Br/C1 or Br/Pb > 1.0, while Pb halides with Br/CI < ~1.0 experience little haiide loss.

Original languageEnglish (US)
Pages (from-to)682-685
Number of pages4
JournalEnvironmental Science and Technology
Volume19
Issue number8
DOIs
StatePublished - Aug 1 1985

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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