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| Kojima湖表层水的腐殖质特征 |
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野上佑作1, 福原富2
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1.Department of Biological Chemistry, 1-1 Ridai-cho, Okayama 700, Japan;2.Department of Applied Chemistry Okayama University of Science, 1-1 Ridai-cho, Okayama 700, Japan
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| 摘要: |
| Humic compounds are one of the major substances that affect the COD value of the surface water of Lake Kojima. The humic compounds in the lake water were studied with a spectrofluorophotometer. The 3-dimensional fluorescence spectrum suggests that two kinds of fluorescent substances exist in the lake water. One shows an fluorescence excitation maxim (Ex) at about 240 nm and an emission maxim (Em) at 413 nm. The other has an Ex at 330 nm and an Em at 418 nm. The former peaks are associated with humic acid and the latter peaks are associated with fulvic acid. These peak intensities are proportional to the COD values. The fulvic acid in the lake water may be enriched by the effluent from domestic water treatment plants. |
| 关键词: 3-dimensional fluorescence spectrum humic acid fulvic acid Lake Kojima |
| DOI：10.18307/1998.sup25 |
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| Characterization of Humic Compounds in the Surface-Water of Lake Kojima |
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Yusaku Nogami1, Minoru Fukuhara2
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1.Department of Biological Chemistry, 1-1 Ridai-cho, Okayama 700, Japan;2.Department of Applied Chemistry Okayama University of Science, 1-1 Ridai-cho, Okayama 700, Japan
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| Abstract: |
| Humic compounds are one of the major substances that affect the COD value of the surface water of Lake Kojima. The humic compounds in the lake water were studied with a spectrofluorophotometer. The 3-dimensional fluorescence spectrum suggests that two kinds of fluorescent substances exist in the lake water. One shows an fluorescence excitation maxim (Ex) at about 240 nm and an emission maxim (Em) at 413 nm. The other has an Ex at 330 nm and an Em at 418 nm. The former peaks are associated with humic acid and the latter peaks are associated with fulvic acid. These peak intensities are proportional to the COD values. The fulvic acid in the lake water may be enriched by the effluent from domestic water treatment plants. |
| Key words: 3-dimensional fluorescence spectrum humic acid fulvic acid Lake Kojima |
