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  • P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

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    Vol.16, No.6
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    The photochemical reactions of iron species in rain and snow in Higashi-Hiroshima, Japan

    Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
    2003, v.16 no.6, pp.466-474
    DoHoonKim (KRD)
    HiroshiSakugawa (Hiroshima University)
    JinSikLee (Kyungsung University)
    DoHoonKim, , HiroshiSakugawa, , & JinSikLee, (2003). The photochemical reactions of iron species in rain and snow in Higashi-Hiroshima, Japan. , 16(6), 466-474.

    Abstract

    This paper describes the concentrations of total dissolved iron (tFe) and $Fe^{2+}$ in rainwater and snow, the relationship of Fe species with other metals and ions in bulk rainwater, and the $Fe^{2+}$ generation mechanism in aqueous samples in rainwater of time series collection. Volume weight mean concentrations of tFe and $Fe^{2+}$ were 3.22 and $1.25{\mu}gL^{-1}$ in bulk rainwater, and 50.1 and $43.5{\mu}gL^{-1}$ in snow, respectively. $Fe^{2+}$ was significant fraction to the tFe, accounted for 3.25-93.4% of the tFe in rainwater and 87% in snow. We also investigated temporal variations of tFe, $Fe^{2+}$, other metals and ions in rainwater of time series collection during rain event. Although the concentration range of tFe was different from those of other species, a decreasing trend of tFe from the beginning of the rain event was similar with other species. However, though $Fe^{2+}$ did not show such a decreasing trend, $Fe^{2+}$/tFe was in good correlation with solar radiation. From the results of multiple linear regression analysis and thermodynamic calculations (Mineql+), $Fe^{2+}$ in our samples may be generated from photochemical reduction of $Fe^{3+}$ species (such as $Fe(OH)^{2+}$,$Fe(OH)^{2+}$ and Fe-oxalate) at daytime.

    keywords
    iron species, rainwater, snow, photochemical reduction

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