Fluorescent characteristics of dissolved organic materials in groundwaters from tertiary rocks near uranium showings

DOI Web Site 1 Citations 6 References
  • Nagao Seiya
    Faculty of Environmental Earth Science, Hokkaido University
  • Seki Yoji
    Institute for Geo-Resources and Environment Advanced Industrial Science and Technology
  • Watanabe Yoshio
    Research Core for Deep Geological Environments Advanced Industrial Science and Technology

Bibliographic Information

Other Title
  • 新第三系ウラン鉱徴地における地下水溶存有機物の蛍光特性
  • 新第三系ウラン鉱徴地における地下水溶在有機物の蛍光特性
  • シン ダイ3ケイ ウラン コウチョウチ ニ オケル チカスイ ヨウザイ ユウキブツ ノ ケイコウ トクセイ

Search this article

Description

  Shallow groundwater samples were collected from 0 m to 45 m depth from surface in a borehole by multi-packer system. Fluorescent characteristics of the dissolved organic materials were analyzed by three-dimensional fluorescence spectroscopy without any pretreatments. The shallow groundwaters have fluorescent peaks of fulvic-like materials at an excitation wavelength of 285-325 nm and an emission wavelength of 400-425 nm. The organic carbon concentration of fulvic-like materials were estimated for 0.01-0.13 mg/l on the basis of relationship between fluorescence intensity and organic carbon content of isolated groundwater fulvic acid. The fulvic-like materials in groundwaters from sedimentary rock layers have 12 nm higher peak position on an excitation wavelength than those of the granitic formation. These results indicate that fulvic-like materials is transported from different sources to groundwaters in the granitic formation and/or their characteristics vary through the transport due to sorption. The association of fulvic-like materials with uranium may occur in these groundwaters on the basis of a positive correlation in concentrations between uranium and fulvic-like materials

Journal

Citations (1)*help

See more

References(6)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top