1989 Fiscal Year Annual Research Report

環境生態系に関与する長半減期核種のキャラクタリゼ-ションと生物学的影響

Research Project

Project/Area Number	63303015
Research Institution	University of Tsukuba
Principal Investigator	関季紀筑波大学, 化学系, 講師 (70015775)
Co-Investigator(Kenkyū-buntansha)	大桃洋一郎放医研環境放射生態学, 部長 (00160630) 小柳卓放医研那珂湊支所, 支所長 (00162074) 滝澤行雄秋田大学, 医学部, 教授 (60018306) 本田嘉秀近畿大学, 理工学部, 教授 (50088340) 寺田喜久雄金沢大学, 理工学部, 教授 (50019460)
Keywords	環境生態系 / 長半減期放射性核種 / キャラクタリゼ-ション / 大気浮遊塵フォ-ルアウト・プルトニウム / テクネチウム / 放射性ヨウ素 / 線量寄与
Research Abstract	I.物理的・化学的キャラクタリゼ-ションと挙動(1)^<99>Tc、^<237>Npの分析法を改良し、^<99>Tc、^<129>I、^<137>Cs、^<237>Np、^<2239、248>Pu、^<1241>Amを用いると検出限界が非常に低くなることを示した。の深度分布から土壌中の挙動の解明に新しい知見が得られた。 (2)新たに開発した8段型ロ-プレッシャ・インパクタ-で、大気浮遊塵中放射性核種の粒度分布を測定し、^7Beは在来型では1.1μm以下の粒径に50〜70%分布しているのに対し、0.33から0.9μmに山形の分布をしていることが分かった。(3)キチンに、CS_2-基を導入したところ、^<99>TcはpH≦2.0で定量的に吸着し、ベルオキソ二硫酸アンモニウムを含む硫酸を加え、10分間沸騰水中で加熱することにより98%以上が溶離された。(4)外洋海水中のプルトニウムの水酸化鉄挙動を再検討し、海水中のプルトニウムのかなりの部分がV、VI価で鉄共沈しにくいことが分かった。(5)海水中の^<2239、248>Puおよび^<1241>の濃度の測定結果から、プルトニウム濃度は核実験が中止された後、低下したが、1984年以降はむしろ一定でこれは化学形と関連するものである。II.生体へのとり込みと影響(6)放射性コバルトとアメリシウムの生体への取り込みと沿岸底質との相互作用、すなわち収着と脱離に及ぼす底質の篩別分画条件と海洋細菌の影響について研究を行った結果、不可逆な収着機構が示唆された。(7)海産生物によるテクネチウムの取り込み及び排出のトレ-サ-実験の結果、エビでテクネチウムは中腸腺に最も多く分布することがわかった。(8)放射性ヨウ素(I^-)を添加した土壌を用い水稲のポット栽培をしたところ、地上部及び土壌表面からガス状放射性ヨウ素が揮散することが認められ、その化学形は有機形であることが推定された。III.キヤラクタリゼ-ションと線量寄与の評価(9)人体臓器・血液中の^<210>Po、^<210>Pbの分析、測定を行い、それぞれ、50%、70%が骨に存在することが分かった。

Research Products

(23 results)

All Other

All Publications (23 results)

[Publications] Y.Igarashi: "Condideration on Intake of Uranium through smoking" J.Radioanal.Nuclear Chem.,Letters,. 135. 157-164 (1989)
[Publications] C.K.Kim: "Application of Inductively Coupled plasma Mass Spectrometry to the determination of ^<99>Tc in soil samples" Radioisotopes. 38. 151-152 (1989)
[Publications] C.K.Kim: "Determination of ^<237>Np in Soil Samples Using Inductively Coupled Plasma Mass Spectrometry" Radioisotopes. 38. 153-154 (1989)
[Publications] R.Seki: "環境テクネチウムの定量とその分布" Radioisotopes. 38. 155-161 (1989)
[Publications] R.Seki: "Distribution of Long-lived Radioiodine in Soil" J.Radioanal.Nuclear Chem.,Articles. inpress (1990)
[Publications] N.Ikeda: "Inverse-square Areal Distribution of ^<129>I in Soil" Radioisotopes. 38. 267-268 (1989)
[Publications] N.Ikeda: "Activation Analysis for Technetium-99 by the Use of a Neutron-excitation Reaction" J.Radional.Nuclear Chem.,Articles. 131. 65-71 (1989)
[Publications] C.K.Kim: "Determination of ^<237> Np in Environmental Samples Using Inductively Coupled Plasma Mass Spectrometry" J.Radional.Nuclear Chem.,Articles. 132. 131-137 (1989)
[Publications] C.K.Kim: "Measurement of ^<240>Pu/^<239>Pu Ratio by Fission Track Method and Inducttively Coupled Plasma Mass Spectrometry" J.Radional.Nuclear Chem.,Articles. 136. 353-362 (1989)
[Publications] S.Morita: "Determination of Technetium-99 in Encironmental Samples by Inductively Coupled plasma Mass Sectrometry" Applied Radiation and Isotopes. (tobepublished)
[Publications] 阿部道子: "自然環境におけ大気中放射性核種の微細領域(1.1μm以下)を含む粒度分布測定法の開発" Radioisotopes.
[Publications] Takaharu Honjo: "Solid-liquid extraction and back extrction of metals with silica-immobilized 8-hydroxyquinoline" Fresenius'Z.Anal.Chem.330. 159-160 (1988)
[Publications] Eiichi Shirakawa: "Highly sensitive spectrofluorometry of europium(III)as its benzoyltrifluoroacetone complex with trioctylphosphine oxide by means of solvent extraction an vacuum sublimation" Fresenius'Z.Anal.Chem.334. 37-40 (1989)
[Publications] T.Nakanishi: "Successive determination of ^<210>Pb,^<210>Po,^<226>Ra,^<226>Ra ^<228>Ra and selected actinides in seqwater and sea sediment" J.Radioanal.Nucl.Chem.,articles. 138(2). inpress (1990)
[Publications] T.Nakanishi: "Iron(III)hydroxide coprecipitation of plutonium and americium in seawater" J.Redioanal.Nucl.Chem.Lett.
[Publications] T.Nakanishi: "Ultrafiltration of natural and artificial radionuclides in sseawater" J.Redioanal.Nucl.Chem.Lett.
[Publications] Y.Kimura: "Studies on the Physico-chemical Behavior of ^<60>Ru and ^<144>Ce in Fresh Water" Hoken Butsuri. 24. 237-247 (1989)
[Publications] 福井正美: "沿海底土への放射性核種の分配および吸着挙動" 日本原子力学会誌. 31. 93-103 (1989)
[Publications] Takaharu Honjo: "Separation and determination of lead(II) with monothiochenoyltrifluoroacetone in benzene by means of back extraction" Fresenius'Z.Anal.Chem.331. 647 (1988)
[Publications] Akihiko Haruta: "Determination of trace amounts of bismuth in water by hydride generation atomic absorption spectrometry after preconcentration with thionalide-loaded silica gel" Anal.Sci.5. 319-322 (1989)
[Publications] Koyanagi,T.: "Concentration of Technetium by Marine Organisms" Proceedings of Twenty-Eighth Hanford Symposium on Health and the Environment,“Environmental Monitoring,Restoration and Assessment:What Have We Learned?". (1990)
[Publications] Y.Muramatsu: "tracer experiments on transfer of radioiodine in the soil-rice plant system" Water,Air and Soil Pollution. 521. 157-171 (1989)
[Publications] Y.Muramatsu: "Some considerations on the sorption and desorption phenomena of iodine and iodate on soil" Water,air and Soil Pollution. 47. (1989)

1989 Fiscal Year Annual Research Report

環境生態系に関与する長半減期核種のキャラクタリゼ-ションと生物学的影響

Principal Investigator

関 季紀 筑波大学, 化学系, 講師 (70015775)

Research Products

[Publications] Y.Igarashi: "Condideration on Intake of Uranium through smoking" J.Radioanal.Nuclear Chem.,Letters,. 135. 157-164 (1989)

[Publications] C.K.Kim: "Application of Inductively Coupled plasma Mass Spectrometry to the determination of ^<99>Tc in soil samples" Radioisotopes. 38. 151-152 (1989)

[Publications] C.K.Kim: "Determination of ^<237>Np in Soil Samples Using Inductively Coupled Plasma Mass Spectrometry" Radioisotopes. 38. 153-154 (1989)

[Publications] R.Seki: "環境テクネチウムの定量とその分布" Radioisotopes. 38. 155-161 (1989)

[Publications] R.Seki: "Distribution of Long-lived Radioiodine in Soil" J.Radioanal.Nuclear Chem.,Articles. inpress (1990)

[Publications] N.Ikeda: "Inverse-square Areal Distribution of ^<129>I in Soil" Radioisotopes. 38. 267-268 (1989)

[Publications] N.Ikeda: "Activation Analysis for Technetium-99 by the Use of a Neutron-excitation Reaction" J.Radional.Nuclear Chem.,Articles. 131. 65-71 (1989)

[Publications] C.K.Kim: "Determination of ^<237> Np in Environmental Samples Using Inductively Coupled Plasma Mass Spectrometry" J.Radional.Nuclear Chem.,Articles. 132. 131-137 (1989)

[Publications] C.K.Kim: "Measurement of ^<240>Pu/^<239>Pu Ratio by Fission Track Method and Inducttively Coupled Plasma Mass Spectrometry" J.Radional.Nuclear Chem.,Articles. 136. 353-362 (1989)

[Publications] S.Morita: "Determination of Technetium-99 in Encironmental Samples by Inductively Coupled plasma Mass Sectrometry" Applied Radiation and Isotopes. (tobepublished)

[Publications] 阿部道子: "自然環境におけ大気中放射性核種の微細領域(1.1μm以下)を含む粒度分布測定法の開発" Radioisotopes.

[Publications] Takaharu Honjo: "Solid-liquid extraction and back extrction of metals with silica-immobilized 8-hydroxyquinoline" Fresenius'Z.Anal.Chem.330. 159-160 (1988)

[Publications] Eiichi Shirakawa: "Highly sensitive spectrofluorometry of europium(III)as its benzoyltrifluoroacetone complex with trioctylphosphine oxide by means of solvent extraction an vacuum sublimation" Fresenius'Z.Anal.Chem.334. 37-40 (1989)

[Publications] T.Nakanishi: "Successive determination of ^<210>Pb,^<210>Po,^<226>Ra,^<226>Ra ^<228>Ra and selected actinides in seqwater and sea sediment" J.Radioanal.Nucl.Chem.,articles. 138(2). inpress (1990)

[Publications] T.Nakanishi: "Iron(III)hydroxide coprecipitation of plutonium and americium in seawater" J.Redioanal.Nucl.Chem.Lett.

[Publications] T.Nakanishi: "Ultrafiltration of natural and artificial radionuclides in sseawater" J.Redioanal.Nucl.Chem.Lett.

[Publications] Y.Kimura: "Studies on the Physico-chemical Behavior of ^<60>Ru and ^<144>Ce in Fresh Water" Hoken Butsuri. 24. 237-247 (1989)

[Publications] 福井正美: "沿海底土への放射性核種の分配および吸着挙動" 日本原子力学会誌. 31. 93-103 (1989)

[Publications] Takaharu Honjo: "Separation and determination of lead(II) with monothiochenoyltrifluoroacetone in benzene by means of back extraction" Fresenius'Z.Anal.Chem.331. 647 (1988)

[Publications] Akihiko Haruta: "Determination of trace amounts of bismuth in water by hydride generation atomic absorption spectrometry after preconcentration with thionalide-loaded silica gel" Anal.Sci.5. 319-322 (1989)

[Publications] Koyanagi,T.: "Concentration of Technetium by Marine Organisms" Proceedings of Twenty-Eighth Hanford Symposium on Health and the Environment,“Environmental Monitoring,Restoration and Assessment:What Have We Learned?". (1990)

[Publications] Y.Muramatsu: "tracer experiments on transfer of radioiodine in the soil-rice plant system" Water,Air and Soil Pollution. 521. 157-171 (1989)

[Publications] Y.Muramatsu: "Some considerations on the sorption and desorption phenomena of iodine and iodate on soil" Water,air and Soil Pollution. 47. (1989)

関季紀筑波大学, 化学系, 講師 (70015775)