Measurements of Trace Metals in Precipitation at Mt.Happo, Central Japan
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Precipitation was collected every 24h at Mt.Happo with an automatic wet-only collector; concentrations of inorganic ionic components and dissolved trace metals (Fe, Mn, Al, Pb, Cu and Zn) were measured. The elution of metals such as Zn, Fe, and Cu from the collector was observed, whereas concentration levels of Al, Pb and Mn were low. Preservation tests of metals in rainwater samples stored in polypropylene bottles showed little variation in concentrations of Zn, Mn and Pb. In contrast, Fe, Cu and AI concentrations tended to increase or decrease. Median concentrations of Mn and Pb in precipitation at Mt.Happo in 1996, which had preservation stability and low elution from the collector, were 1.7μg/L for Mn and 1.6μg/L for Pb. The concentration of Mn was strongly correlated with that of Ca<SUP>2+</SUP>(r =0.95) and increased in the spring, especially during yellow-sand events. The concentration of Pb was highly correlated with that of non-sea-salt (nss)-SO<SUB>4</SUB><SUP>2-</SUP> in the winter (r = 0.97).
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社団法人 環境科学会 | 論文
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