Radioecological Studies of <SUP>90</SUP>Sr in Limnological Ecosystems

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Other Title
  • 陸水系における<SUP>90</SUP>Srの放射生態に関する研究
  • 陸水系における90Srの放射生態に関する研究--〔埼玉県〕県内有数河川-下流域の河川水,河底土壌および生息生物における90Srの放射能
  • リクスイケイ ニ オケル 90Sr ノ ホウシャ セイタイ ニ カンスル ケンキュウ サイタマケン ケンナイ ユウスウ カセン カリュウイキ ノ カセンスイ カワゾコ ドジョウ オヨビ セイソク セイブツ ニ オケル 90Sr ノ ホウシャノウ
  • ―県内有数河川一下流域の河川水, 河底土壌および生息生物における<SUP>90</SUP>Srの放射能―
  • —<SUP>90</SUP>Sr Concentrations in Water, Sediment and Biota at the Lower Region of the Famous River in Saitama Prefecture, Japan—

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Abstract

The concentrations of90Srin water, sediment and biota at the lower region of the famous river in Saitama prefecture were determined in order to elucidate the radioecology of90Srin limnological ecosystems.<BR>90Srconcentration in water was 2.0±0.3mBq/L (mean±standard error), and so indicated about 20 times higher than that (0.10mBq/L) of137Csin our previous report.90Srconcentrations in sediment (0.22±0.03Bq/kg), snail, Sinotaia quadratus historica (0.62±0.03Bq/kg), crayfish, Procambarus clarki (3.7±0.3Bq/kg), and crucian carp, Carassius auratus cuvieri (0.48±0.06Bq/kg), were about 110, 310, 1900 and 240 times higher than that of the water, respectively.<BR>Remarkable higher concentration for the crayfish is attributable to that (8.7±0.7Bq/kg) for the tissue of carapace weighing about 50% in comparison with that (0.33±0.05Bq/kg) for the other tissues.<BR>Difference for concentration between90Srand137Cs (in previous report) in each sample will be due to that of the concentration mechanism.

Journal

  • RADIOISOTOPES

    RADIOISOTOPES 48 (12), 720-724, 1999

    Japan Radioisotope Association

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