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硝酸態窒素に汚染された湧水群における無機態窒素の動態と水質特性の解析
http://hdl.handle.net/10659/3349
http://hdl.handle.net/10659/334960aa28a8-7008-409c-8af2-5282e63c1d3f
名前 / ファイル | ライセンス | アクション |
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Shiratori_syuuron.pdf (1.5 MB)
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Item type | 学位論文 / Thesis or Dissertation(1) | |||||
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公開日 | 2013-07-17 | |||||
タイトル | ||||||
タイトル | 硝酸態窒素に汚染された湧水群における無機態窒素の動態と水質特性の解析 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_46ec | |||||
資源タイプ | thesis | |||||
著者 |
白鳥, 聖也
× 白鳥, 聖也 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The purpose of this study is to examine the present of NO_3-N pollution and the factors causing the differences in the pollution levels in the spring waters at headwater of Bibi River, Chitose, Japan. Most of NO_3-N concentrations in the spring waters were over the environmental standard of 10 mgN/L, suggesting that the NO_3-N pollution still remain at headwater of Bibi River. While the NH_4-N concentrations at 33 of 49 spring waters were less than detection limit, the high NH_4-N concentrations were observed at the rest waters. From the relationships between the concentrations of NO_<3-> and SO_4^<2->, it could be explained that the primary source of NO|3-N is the waste of domestic animals. In addition, there is a significant positive correlation between NH_4^+ and K^+, suggesting that the pollution of nitrogen species in the spring waters has been expanded by the waste of domestic animals. As a result of principal component analysis, it was suggested that the water quality of each spring waters was determined by the quantity of inorganic nitrogen species and the residence time for ground water, and by the degree of nitrification. In the incubation experiment, the nitrification reaction was observed in the spring waters with low dissolved oxygen and high NH_4^+ concentration under the aerobic conditions. Therefore, it suggests that the nitrification reaction in the spring waters could be suppressed by deficiency of dissolved oxygen. From what has been discussed above, it was concluded that the pollution by the waste of domestic animals in the spring waters at headwater of Bibi River induce the deficiency of dissolved oxygen, resulting in the differences in NO_3-N pollution levels observed among spring waters. | |||||
書誌情報 | p. 1-72 | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | Thesis | |||||
学位名 | ||||||
学位名 | 酪農学 | |||||
学位授与機関 | ||||||
学位授与機関名 | 酪農学園大学 | |||||
学位授与年月日 | ||||||
学位授与年月日 | 2012 |