Determination of aquatic humic substances in Japanese lakes and wetlands by the carbon concentration-based resin isolation technique
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Aquatic humic substances (AHSs) are major constituents of dissolved organic matter (DOM) in freshwater bodies. We performed quantitative analyses of AHSs in Japanese lake and wetland waters, focusing mainly on clear waters with low carbon contents, by using a resin isolation technique based on the carbon concentration in the AHSs of each sample. The proportion of AHS to DOM in the clear waters ranged from 38.4 to 64.1 %; these proportions are lower than those widely assumed for freshwater of 20–80 %. Moreover, the proportions of AHSs in DOM were not constant, so regression analysis cannot be used to predict the AHS concentration from the DOM concentration. Thus, AHS and DOM concentrations must be determined separately for each water sample.
KeywordsDissolved organic matter (DOM) Aquatic humic substance (AHS) Clear water Quantitative analysis Resin isolation technique
This work was supported by a Grant-in-Aid for Scientific Research (C-24510044, 2012–2014).
- Aiken GR (1985) Humic substances in soil, sediment, geochemistry, isolation characterization. In: Aiken GR, McKnight DM, Wershaw RL, MacCarthy P (eds). Wiley, New York, p 363Google Scholar
- Ishiwatari R, Yonebayashi K, Miyazima T (2008) Humic substances in environment—their characteristics and investigative approach. Sankyo Publishing Co., Ltd, pp 30–32 (in Japanese) Google Scholar
- Steinberg C, Muenster U (1985) Geochemistry and ecological role of humic substances in lakewater. In: Aiken GR, McKnight DM, Wershaw RL, MacCarthy P (eds) Humic substances in soil, sediment, and water: geochemistry, isolation and characterization. Wiley, New York, pp 105–145Google Scholar
- Thurman EM (1985) Aquatic humic substances (chap. 10). In: Organic Geochem Natur Waters. Kluwer Academic Publishers Group, Dordrecht, pp 273–362Google Scholar