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Hyporheic exchange and fulvic acid redox reactions in an alpine stream/wetland ecosystem, Colorado front range

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Hyporheic exchange and fulvic acid redox reactions in an alpine stream/wetland ecosystem, Colorado front range; 2006; Article; Journal; Environmental Science and Technology; Miller, M. P.; McKnight, D. M.; Cory, R. M.; Williams, M. W.; Runkel, R. L.

Summary

The influence of hyporheic zone interactions on the redox state of fulvic acids and other redox active species was investigated in an alpine stream and adjacent wetland, which is a more reducing environment. A tracer injection experiment using bromide (Br-) was conducted in the stream system. Simulations with a transport model showed that rates of exchange between the stream and hyporheic zone were rapid (α ≈ 10-3 s-1). Parallel factor analysis of fluorescence spectra was used to quantify the redox state of dissolved fulvic acids. The rate coefficient for oxidation of reduced fulvic acids (λ = 6.5 × 10-3 s-1) in the stream indicates that electron-transfer reactions occur over short time scales. The rate coefficients for decay of ammonium [...]

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Type Scheme Key
local-index unknown 70028857
local-pk unknown 70028857
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1021/es060635j
series unknown Environmental Science & Technology

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journalEnvironmental Science & Technology
parts
typevolume
value40
typeissue
value19
languageEnglish
citationTypeArticle

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