Processes affecting the movement of organochlorine pesticides (OCPs) between soil and air in an industrial site in Turkey


Bozlaker A., Muezzinoglu A., ODABAŞI M.

CHEMOSPHERE, vol.77, no.9, pp.1168-1176, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 77 Issue: 9
  • Publication Date: 2009
  • Doi Number: 10.1016/j.chemosphere.2009.09.032
  • Journal Name: CHEMOSPHERE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1168-1176
  • Keywords: Organochlorine pesticides, Dry deposition flux, Deposition velocity, Air-soil exchange, POLYCYCLIC AROMATIC-HYDROCARBONS, POLYCHLORINATED-BIPHENYLS PCBS, SEMIVOLATILE ORGANIC-COMPOUNDS, DRY DEPOSITION FLUXES, WATER-SURFACE SAMPLER, ATMOSPHERIC CONCENTRATIONS, PARTITION-COEFFICIENTS, AGRICULTURAL SOILS, EQUILIBRIUM STATUS, GAS-EXCHANGE
  • Dokuz Eylül University Affiliated: Yes

Abstract

Soil and atmospheric concentrations, dry deposition and soil-air gas exchange of organochlorine pesticides (OCPs) were investigated at an industrial site in Aliaga, Izmir, Turkey. Current-use pesticides, endo-sulfan and chlorpyrifos, had the highest atmospheric levels in summer and winter. Summertime total (gas + particle) OCP concentrations in air were higher, probably due to increased volatilization at higher temperatures and seasonal local/regional applications of current-use pesticides. Particle deposition fluxes were generally higher in summer than in winter. Overall average dry particle deposition velocity for all the OCPs was 4.9 +/- 4.1 cm, s(-1) (average +/- SD). Sigma DDXs (sum of p,p'-DDT, p,p'-DDD, and p,p'-DDE) were the most abundant OCPs in Aliaga soils (n = 48), probably due to their heavy historical use and persistence. Calculated fugacity ratios and average net gas fluxes across the soil-air interface indicated volatilization for alpha-CHL. gamma-CHL. heptachlorepoxide, cis-nonachlor, trans-nonachlor, and p,p'-DDT in summer, and for alpha-CHL, gamma-CHL trans-nonachlor, endosulfan sulfate, and p,p'-DDT in winter. For the remaining OCPs, soil acted as a sink during both seasons. Comparison of the determined fluxes showed that dry particle, gas-phase, and wet deposition are significant OCP input mechanisms to the soil in the study area. (C) 2009 Elsevier Ltd. All rights reserved.