Environmental Science and Pollution Research

, Volume 20, Issue 1, pp 227–237

Seasonal and air mass trajectory effects on dissolved organic matter of bulk deposition at a coastal town in south-western Europe

  • Patrícia S. M. Santos
  • Eduarda B. H. Santos
  • Armando C. Duarte
Research Article

DOI: 10.1007/s11356-012-0971-4

Cite this article as:
Santos, P.S.M., Santos, E.B.H. & Duarte, A.C. Environ Sci Pollut Res (2013) 20: 227. doi:10.1007/s11356-012-0971-4

Abstract

Rainwater contains a complex mixture of organic compounds which may influence climate, terrestrial and maritime ecosystems and thus human health. In this work, the characteristics of DOM of bulk deposition at a coastal town on the southwest of Europe were assessed by UV–visible and three-dimensional excitation–emission matrix fluorescence spectroscopies and by dissolved organic carbon (DOC) content. The seasonal and air mass trajectory effects on dissolved organic matter (DOM) of bulk deposition were evaluated. The absorbance at 250 nm (UV250nm) and integrated fluorescence showed to be positively correlated with each other, and they were also positively correlated to the DOC in bulk deposition, which suggest that a constant fraction of DOM is likely to fluoresce. There was more chromophoric dissolved organic matter (CDOM) present in summer and autumn seasons than in winter and spring. Bulk deposition associated with terrestrial air masses contained a higher CDOM content than bulk deposition related to marine air masses, thus highlighting the contribution of terrestrial/anthropogenic sources.

Keywords

RainwaterDOMUV–visible spectroscopyFluorescence spectroscopySeasonal variationAir mass trajectory

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Patrícia S. M. Santos
    • 1
  • Eduarda B. H. Santos
    • 1
  • Armando C. Duarte
    • 1
  1. 1.CESAM (Centre for Environmental and Marine Studies) & Department of ChemistryUniversity of AveiroAveiroPortugal