Dry deposition and soil-air gas exchange of polychlorinated biphenyls (PCBs) in an industrial area


Bozlaker A., ODABAŞI M., Muezzinoglu A.

ENVIRONMENTAL POLLUTION, vol.156, no.3, pp.784-793, 2008 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 156 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1016/j.envpol.2008.06.008
  • Journal Name: ENVIRONMENTAL POLLUTION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.784-793
  • Keywords: PCBs in air, PCBs in soil, Dry deposition flux, Deposition velocity, Soil-air exchange, POLYCYCLIC AROMATIC-HYDROCARBONS, SEMIVOLATILE ORGANIC-COMPOUNDS, HISTORICAL EMISSION INVENTORY, ORGANOCHLORINE PESTICIDES, ATMOSPHERIC CONCENTRATIONS, PARTITION-COEFFICIENTS, AMBIENT CONCENTRATIONS, SPATIAL TRENDS, LONG-TERM, CONGENERS
  • Dokuz Eylül University Affiliated: Yes

Abstract

Ambient air and dry deposition, and soil samples were collected at the Aliaga industrial site in Izmir, Turkey. Atmospheric total (particle + gas) Sigma(41)-PCB concentrations were higher in summer (3370 1617 pg m(-3). average + SD) than in winter (1164 +/- 618 pg m(-3)), probably due to increased volatilization with temperature. Average particulate Sigma(41)-PCBs dry deposition fluxes were 349 +/- 183 and 469 +/- 328 ng m(-2) day(-1) in summer and winter, respectively. Overall average particulate deposition velocity was 5.5 +/- 3.5 cm s(-1). The spatial distribution of Sigma(41)-PCB soil concentrations (n = 48) showed that the iron-steel plants, ship dismantling facilities, refinery and petrochemicals complex are the major sources in the area. Calculated air-soil exchange fluxes indicated that the contaminated soil is a secondary source to the atmosphere for lighter PCBs and as a sink for heavier ones. Comparable magnitude of gas exchange and dry particle deposition fluxes indicated that both mechanisms are equally important for PCB movement between air and soil in Aliaga. (C) 2008 Elsevier Ltd. All rights reserved.