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Pregled bibliografske jedinice broj: 327207

Long-term investigations of post-Chernobyl radiocaesium in fallout and air in North Croatia


Franić, Zdenko; Šega, Krešimir; Petrinec, Branko; Marović, Gordana
Long-term investigations of post-Chernobyl radiocaesium in fallout and air in North Croatia // Environmental Monitoring and Assessment, 148 (2009), 1-4; 315-323 doi:10.1007/s10661-008-0162-4 (međunarodna recenzija, članak, znanstveni)


Naslov
Long-term investigations of post-Chernobyl radiocaesium in fallout and air in North Croatia

Autori
Franić, Zdenko ; Šega, Krešimir ; Petrinec, Branko ; Marović, Gordana

Izvornik
Environmental Monitoring and Assessment (0167-6369) 148 (2009), 1-4; 315-323

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
137Cs; 134Cs; Chernobyl accident; deposition flux; deposition velocity; ecological half-life

Sažetak
The long-term behaviour of 137Cs activity concentrations in air and fallout has been studied in the city of Zagreb for the post-Chernobyl period (1986– 2006) as a part of an extended monitoring program of radioactive contamination of human environment in Croatia. Annual mean 137Cs activity concentrations in air and annual total deposition fluxes (wet plus dry) decreased from 2.8×10-4 Bq m-3 in September 1986 to 3.0×10-6 Bq m-3 in last quarter of 2006 and from 6, 410 Bq m-2 year-1 in 1986 to 2 Bq m-2 year-1 in 2006 respectively. By fitting the measured 137Cs activity concentrations to the theoretical curve the ecological half-lives of 137Cs in air and fallout were estimated with respective values of 0.46 and 0.54 years for immediate post-Chernobyl period, increasing to 5.52 and 3.97 years afterwards. Using the data on 137Cs activity concentrations in air and fallout total caesium deposition velocity of (3.34± 3.13)×10-2 ms-1 was estimated with median value being 2.13×10-2 ms-1. Such relatively high 137Cs deposition velocities compared with pre-Chernobyl ones, are characteristic for the post-Chernobyl period and, according to Stokes settling law, indicate that the diameters of aerosol particles associated with 137Cs originated from the Chernobyl accident are pretty large, i.e. >1 μ m. 134Cs/137Cs activity ratio in fallout and in air has been found to be similar to the theoretically predicted values, initial value being about 0.5 and decreasing according to differential radioactive decay. The similar ratio has been observed in most of the other environmental samples.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Javno zdravstvo i zdravstvena zaštita



POVEZANOST RADA


Projekt / tema
022-0222882-2271 - Vremensko-prostorna razdioba i porijeklo lebdećih čestica u urbanim sredinama (Krešimir Šega, )
022-0222882-2335 - RADIOAKTIVNOST OKOLIŠA I ZAŠTITA OD ZRAČENJA (Gordana Marović, )
022-0222882-2823 - Radioekologija Jadranskoga mora i priobalja (Zdenko Franić, )

Ustanove
Institut za medicinska istraživanja i medicinu rada, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


Uključenost u ostale bibliografske baze podataka:


  • ASFA: Aquatic Science and Fisheries Abstracts
  • Biological Sciences
  • BIOSIS Previews (Biological Abstracts)
  • CAB Abstracts
  • CA Search (Chemical Abstracts)
  • EMBASE (Excerpta Medica)
  • Environline
  • Geoarchive
  • Geobase
  • Health and Safety Science Abstracts
  • INSPEC
  • MEDLINE
  • Pollution Abstracts
  • Toxicology Abstracts


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