title: Distribution and migration of ⁹⁰Sr in components of the Dnieper River basin and the Black Sea ecosystems after the Chernobyl NPP accident.
abstract: The change in (90)Sr concentrations in hydrobionts, water and bottom sediments of the Chernobyl NPP pond-cooler, the Kievskoe and Kakhovskoe reservoirs, the Northern-Crimean canal and the Black Sea after the Chernobyl NPP accident was studied. The environmental half-times for the decrease of (90)Sr concentrations were determined: in water - 4.1-24.3 years; algae and flowering water plants - 3.6-7.7 years, in molluscs - 2.4-6.7 years, and in fish - 7.8-12.9 years. The time for (90)Sr concentrations to decrease to pre-accident levels were estimated: in freshwater reservoirs and the northwest part of the Black Sea this was 32-44 years, and in freshwater hydrobionts this was 25-73 years. The contribution of dose from (90)Sr to the hydrobionts, sampled from the Kakhovskoe reservoir, the Northern-Crimean canal and the Black Sea, has not reached values which could impact them during the entire post-accident period. This complex of comparative studies was carried out for the first time.
authors.affiliation: The A.O. Kovalevsky Institute of Biology of the Southern Seas, National Academy of Sciences of Ukraine (IBSS NAS of Ukraine), Department of Radiation and Chemical Biology, 2 Nakhimov Avenue, Sevastopol 99011, Crimea Region, Ukraine. Electronic address: natmirz@mail.ru.
authors.forename: N Yu
authors.initials: NY
authors.lastname: Mirzoyeva
authors.forename: V N
authors.initials: VN
authors.lastname: Egorov
authors.forename: G G
authors.initials: GG
authors.lastname: Polikarpov
mesh_terms: D000818:Animals; D059038:Black Sea; D047852:Chernobyl Nuclear Accident; D000460:Chlorophyta; D017753:Ecosystem; D005399:Fishes; D019015:Geologic Sediments / Q000032:analysis; D019684:Magnoliopsida; D008974:Mollusca; D011834:Radiation Monitoring; D045483:Rivers / Q000737:chemistry; D012623:Seawater / Q000737:chemistry; D058009:Stramenopiles; D013326:Strontium Radioisotopes / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D013326:Strontium Radioisotopes; D014875:Water Pollutants, Radioactive
keywords: (90)Sr; Chernobyl accident; Dose assessment; Forecast; Redistribution; The Black Sea; The Dnieper River basin