Trace metals in aerosol at Terra Nova Bay, Antarctica

J Environ Monit. 2005 Dec;7(12):1275-80. doi: 10.1039/b507337p. Epub 2005 Nov 2.

Abstract

Atmospheric particulate with an aerodynamic diameter <10 microm (PM10) was sampled continuously during the austral summers of 2000-2001 and 2001-2002 at a coastal site near to the Italian base of Terra Nova, Antarctica. Li, Pb, Cd, U, Ba, Bi, Cs, Rb, Tl, Sr, Al, V, Fe, Cu, Mn, Zn, Co, Ag were determined by inductively coupled sector field mass spectroscopy (ICP-SFMS) after sample digestion by a combination of HF, HNO3, and H2O2 in ultraclean conditions. Quality control of the analytical procedure was carried out by blank control, by evaluating the limits of detection, recoveries and repeatability. Concentrations found are extremely low for most metals, confirming the high purity of Antarctic aerosol. Principal Component Analysis (PCA) highlights high correlations among Pb, Cr, Bi, Cu and Zn concentration values and among Li, U, Ba, Cs, Rb, Al, V, Fe, Mn, Co concentration values permitting the identification of two principal source groups, namely crustal dust and human emission activities. Elements of anthropogenic origins (Pb, Cr, Cu, Zn) were highly enriched with respect to their crustal composition.

MeSH terms

  • Aerosols
  • Air Pollutants / analysis*
  • Antarctic Regions
  • Environmental Monitoring / statistics & numerical data
  • Metals / analysis*
  • Oceans and Seas
  • Particle Size
  • Principal Component Analysis
  • Seasons
  • Seawater

Substances

  • Aerosols
  • Air Pollutants
  • Metals