Characterization of mineralogical controls on ammonium concentrations in deep groundwaters of the Horonobe area, Hokkaido
| Autor: | Randolph C. Arthur, Hiroshi Sasamoto, Hisao Satoh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Ion exchange Radioactive waste Sorption 02 engineering and technology engineering.material 01 natural sciences 020501 mining & metallurgy chemistry.chemical_compound 0205 materials engineering chemistry Geochemistry and Petrology Environmental chemistry Illite engineering Environmental science Economic Geology Ammonium Oil field Clay minerals Groundwater 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geochemical Exploration. 188:318-325 |
| ISSN: | 0375-6742 |
| DOI: | 10.1016/j.gexplo.2018.01.013 |
| Popis: | NH4+ is potentially an important constituent of deep groundwater under reducing condition. The retention of cesium by sorption in geological formations may have an important role ensuring the long-term safety of high-level radioactive waste disposal systems. Cs+ sorption will be affected by competing effects due to dissolved cation likely NH4+ in groundwater, however. In the present study, a possible reaction controlling of NH4+ concentrations in deep groundwater was evaluated based on data from Japan. An investigation of mineralogy and thermodynamic modeling of groundwaters suggests that K-bearing clay minerals (smectite, illite or interstratified illite/smectite), appear to control the NH4+ concentration in groundwaters by ion exchange. Additionally, the selected groundwaters in the Horonobe area seem resemble Japanese gas and oil field groundwaters in terms of NH4+ distribution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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