Published April 1991 | Version v1
Journal article Metadata-only

Effects of ion composition in ground water on distribution coefficient of radionuclide in coastal sandy soil layer

Creators

  • 1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

Description

The distribution coefficient of 60Co, 85Sr and 137Cs for coastal sandy soil layer (aerated zone and aquifer zone) was determined. Effects of pH, conductivity and coexistent ions such as K+, Na+, Ma2+, Ca2+, Cl-, HCO3- and SO42- on the distribution coefficient were studied to clarify the correlation between the distribution coefficient and ion composition in ground water. The sandy soil where sampling point is nearer to the sea, tended to lower the distribution coefficient of three radionuclides. The distribution coefficient of 85Sr for the sandy soil of aquifer zone was markedly smaller than that of aerated zone. This was caused by the presence of Mg2+ and Ca2+ compositions in ground water. The distribution coefficient estimated on the basis of the effect of coexistent ion was sufficiently well agreed with the measured one. Therefore, the distribution coefficient in coastal sandy soil layer will be predicted from ion composition in ground water. (author)

Availability note (English)

Available from DOI: https://doi.org/10.3327/jaesj.33.373

Abstract (Japanese)

海岸に隣接する砂質地層(通気層および帯水層)における60Co、85Srおよび137Csの分配係数の分布を測定した。さらに、分配係数と地下水のイオン組成との関係を明らかにするため、分配係数に及ぼすpH、導電率およびK+、Na+、Mg2+、Cu2+、Cl-、HCO3-、SO42等の共存イオン濃度の影響を調べた。分配係数は3核種ともに海岸に近い地点の砂層ほど小さくなる傾向を示した。85Srの分配係数は、通気層に比較して帯水層で著しく減少した。これは地下水中に含有されるMg2+、およびCa2+に起因していることを明らかにした。さらに、分配係数に与える共存イオン濃度の影響に基づいて地下水のイオン組成から算定した分配係数と実測値の間には十分に良い一致が見られた。したがって、臨海砂層における分配係数の分布を地下水のイオン組成の分析から推定可能であることが見出された。 (日本)

Additional details

Additional titles

Original title (Japanese)
臨海砂質地層における放射性核種の分配係数に及ぼす地下水中イオン組成の影響

Identifiers

DOI
10.3327/jaesj.33.373;

Publishing Information

Journal Title
Nippon Genshiryoku Gakkai-Shi
Journal Volume
33
Journal Issue
4
Journal Page Range
p. 373-380
ISSN
0004-7120

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
54036315
Subject category
S54: ENVIRONMENTAL SCIENCES;
Descriptors DEI
ADSORPTION; AQUEOUS SOLUTIONS; AQUIFERS; CESIUM 137; CHEMICAL STATE; COBALT 60; CONCENTRATION RATIO; DISTRIBUTION FUNCTIONS; GROUND WATER; IONIC COMPOSITION; JAERI; PH VALUE; RADIOACTIVE WASTE DISPOSAL; SAMPLING; SAND; SEAWATER; SOILS; STRONTIUM 85
Descriptors DEC
ALKALINE EARTH ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; COBALT ISOTOPES; DAYS LIVING RADIOISOTOPES; DIMENSIONLESS NUMBERS; DISPERSIONS; ELECTRON CAPTURE RADIOISOTOPES; EVEN-ODD NUCLEI; FUNCTIONS; HOMOGENEOUS MIXTURES; HOURS LIVING RADIOISOTOPES; HYDROGEN COMPOUNDS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; JAPANESE ORGANIZATIONS; MANAGEMENT; MINUTES LIVING RADIOISOTOPES; MIXTURES; NATIONAL ORGANIZATIONS; NUCLEI; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; RADIOACTIVE WASTE MANAGEMENT; RADIOISOTOPES; SOLUTIONS; SORPTION; STRONTIUM ISOTOPES; WASTE DISPOSAL; WASTE MANAGEMENT; WATER; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
This record replaces 22076374