Iodine-131 and other radionuclides in environmental samples collected from Ibaraki/Japan after the Chernobyl accident.
Measurements were made of 131I, 137Cs, 134Cs and 103Ru in environmental samples collected from Ibaraki-Prefecture, Japan, after the Chernobyl accident. The highest values of 131I obtained in May 1986 were 98 Bq l-1 (2.7 nCi l-1) for rain water (collected at the beginning of the rainfall), 400 Bq kg-1 (11 nCi kg-1) for pine needles (wet), 160 Bq kg-1 (4.3 nCi kg-1) for vegetables (wet) and 52 Bq kg-1 (1.4 nCi kg-1) for seaweed (wet). Most of the radioiodine in rain water was present as IO3- and I-. The proportion of IO3- in fresh rain water was higher than that of I-, but the IO3- was converted to I- during storage. About 10% of 131I was removed from leaf vegetables by washing, and about 70% by boiling.
National Institute of Radiological Sciences, Ibaraki, Japan.
Y
Y
Muramatsu
M
M
Sumiya
Y
Y
Ohmomo
D000059:Accidents; D005507:Food Contamination, Radioactive; D007457:Iodine Radioisotopes / Q000032:analysis*; D007564:Japan; D009688:Nuclear Reactors; D010944:Plants / Q000032:analysis; D011848:Radioactive Pollutants / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis*; D012990:Soil Pollutants, Radioactive / Q000032:analysis; D014455:Ukraine; D014675:Vegetables / Q000032:analysis; D014875:Water Pollutants, Radioactive / Q000032:analysis
D007457:Iodine Radioisotopes; D011848:Radioactive Pollutants; D011868:Radioisotopes; D012990:Soil Pollutants, Radioactive; D014875:Water Pollutants, Radioactive