OCCURRENCE OF CHLORATE AND PERCHLORATE IN GROUNDWATER IN TOKYO

DOI 15 References

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Other Title
  • 東京の地下水中の塩素酸イオンおよび過塩素酸イオンの実態調査

Abstract

 Occurrence of chlorate and perchlorate in groundwater in Tokyo was investigated. The samples were collected in 2007 and 2009. Chlorate and perchlorate were detected at the concentrations larger than their determination limits in 24 of 49 and 28 of 52 samples, respectively. Their detection rates in unconfined aquifers and springs were higher than those in confined aquifers. The concentrations of chlorate and perchlorate in about 25% of samples were relatively high, particularly chlorate concentration in one sample (2000 μg/L) exceeded its standard value in drinking water. Compared to other groundwater in Japan (i.e., commercially available natural water and raw water in private water supply), the percentages of the samples with relatively high concentrations of chlorate and perchlorate were higher in groundwater in Tokyo. On the other hand, the percentages of the samples in which chlorate and perchlorate concentrations were larger than determination limits were the lowest. The medians of chlorate and perchlorate in the in groundwater in Tokyo were similar to those in other groundwater in Japan. It was suggested that origins of chlorate and perchlorate in groundwater were drinking water and/or sewage in many cases when their concentrations in groundwater were relatively high.

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Details 詳細情報について

  • CRID
    1390282680332274432
  • NII Article ID
    130004962471
  • DOI
    10.2208/jscejer.69.10
  • ISSN
    21856648
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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