Water, Air and Soil Pollution: Focus

, Volume 3, Issue 5–6, pp 141–155 | Cite as

Study of Bulk and Sub-Event Wet Deposition in Gebze, Turkey

  • Bülent O. Akkoyunlu
  • Mete Tayanç
  • Mehmet Karaca

Abstract

This study presents the chemical composition of bulk deposition during the period of February 1996–May 1997 and the chemical composition of sub-event wet deposition on 13 August 1997 in Gebze. Samples were analyzed for SO42-, NO3-, Cl-,Ca2+, Mg2+, K+, Na+, and NH4+ in addition to pH. The source of some ionic components in the bulk deposition such as K+ and Ca2+ were found to be the terrestrial regions, as expected. The (non-sea Cl-)/Cl- ratio of 0.05 suggests that the very large portion of Cl- in the bulkdeposition was of marine origin. The ratio of (non-sea SO42-)/SO42- varied between 0.86 and 0.99,indicating that the main source of sulfate was not the sea. It is found that the sulfate and calcium concentrations were highest in summer and lowest in fall. The analysis of bulk deposition also indicated that nearly 24% of the events were acidic (pH < 5.6). During sub-event wet deposition collectedon the same site pH decreased continually, and during the passageof cold front concentrations of Cl-, SO42- and NO3- increased.

determination of chemical sources enrichmentfactor sub-event sampling wet and bulk deposition 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Bülent O. Akkoyunlu
    • 1
  • Mete Tayanç
    • 2
  • Mehmet Karaca
    • 3
  1. 1.Department of PhysicsMarmara UniversityGöztepe, IstanbulTurkey; (author for correspondence
  2. 2.Department of Environmental EngineeringMarmara UniversityGöztepe, IstanbulTurkey
  3. 3.ITU, Eurasia Institute of Earth SciencesMaslak, IstanbulTurkey

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