巻号一覧
39 巻 (1997)
- 4 号 p. 287-
- 3 号 p. 187-
- 2 号 p. 87-
- 1 号 p. 1-
39 巻, 1 号
選択された号の論文の6件中1～6を表示しています
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近藤 洋正, 田瀬 則雄, 平田 健正1997 年 39 巻 1 号 p. 1-15
発行日: 1997/02/25
公開日: 2012/12/11
ジャーナル フリーTo investigate nitrate sources in the aquifer consisting of unconsolidated limestone, stable isotope of nitrogen (δ15N) was measured in shallow groundwater from wells and springs under three land-use settings. The typical land-use settings and corresponding average nitrate concentrations and δ15N values were : residental areas,7.1mg/L and 8.0‰; agricultural areas,7.2mg/L and 5.2‰; and natural, undeveloped areas,5.3mg/L and 5.6‰, respectively. Average 15N values of urine sewages and commercial inorganic fertilizers were 18.10‰ and 0.5‰, respectively. Values of δ15N greater than 7‰ in residental areas suggest that nitrogen from sewages exists in groundwater. Values of δ15N less than 7‰ in agricultural areas and a part of natural, undeveloped areas suggest that nitrogen in groundwater was supplied by commercial inorganic fertilizers. Low nitrate concentarations and low values of δ15N in residental areas were caused by dilution with groundwater influenced by commercial fertilizers flowing into residental areas. High δ15N values in agricultural areas suggested that denitrification occurred actively.抄録全体を表示PDF形式でダウンロード (2308K) -
大矢 俊次, アルバート バロッキ, 古市 徹1997 年 39 巻 1 号 p. 17-31
発行日: 1997/02/25
公開日: 2012/12/11
ジャーナル フリーA one-dimensional transport model for in situ bioremediation of a saturated aquifer contaminated by trichloroethylene (TCE) was developed. The model assumes that TCE is degraded by cometabolic transformation in the presence of mobile and immobile methanotrophic bacteria (methanotrophs) stimulated by the injection of methane and oxygen into the aquifer. Simulation results showed qualitative agreements with some of the experimental results reported by other researthers. Competitive inhibition between methane and TCE significantly affected the removal of TCE. The effect of sorption / desorption kinetics for TCE on the removal depends upon the limiting conditions in the system. The removal of TCE is substantially improved by changing the sorption / desorption characteristics, if sorption / desorption is a limiting process. Under the simulated conditions, microbial mobility exerted little influence on the TEC removal rate. These simulation results indicate that this model can provide useful information for understanding the phenomena during a remedial action and for improving the efficiency of TCE removal.抄録全体を表示PDF形式でダウンロード (1898K) -
栗城 稔1997 年 39 巻 1 号 p. 33-41
発行日: 1997/02/25
公開日: 2012/12/11
ジャーナル フリーPDF形式でダウンロード (1342K) -
開發 一郎1997 年 39 巻 1 号 p. 43-45
発行日: 1997/02/25
公開日: 2012/12/11
ジャーナル フリーPDF形式でダウンロード (422K) -
-会津・白河地域-宮岡 邦任, 島野 安雄1997 年 39 巻 1 号 p. 47-57_1
発行日: 1997/02/25
公開日: 2012/12/11
ジャーナル フリーPDF形式でダウンロード (26526K) -
1997 年 39 巻 1 号 p. e1-
発行日: 1997年
公開日: 2012/12/14
ジャーナル フリー
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