巻号一覧
13 巻 (1979)
- 2 号 p. 25-
- 1 号 p. 1-
13 巻, 1 号
選択された号の論文の4件中1～4を表示しています
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報文
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金子 恵美子1979 年 13 巻 1 号 p. 1-6
発行日: 1979/06/30
公開日: 2016/11/14
ジャーナル フリーForty groundwater samples, collected in Sendai City, were analyzed for arsenic and some other chemical constituents. The average arsenic concentration is 1.1μg/l for the samples with pH 6-7, and 12 μg/l for those with pH 7-9. Thus the pH may be a major factor leaching of arsenic adsorbed on the sediments. This has been proved by leaching experiment of arsenic-containing iron (III) hydroxide with alkaline solutions. Then a prolonged contact of the groundwater with the sediments will favor the dissolution of arsenic. The groundwaters with high iron load are often rich in arsenic, suggesting that arsenic is bound to iron in the sediments.抄録全体を表示PDF形式でダウンロード (579K) -
井上 克弘, 岩淵 伸一郎1979 年 13 巻 1 号 p. 7-12
発行日: 1979/06/30
公開日: 2016/11/14
ジャーナル フリーCalcitic calcareous sinters are deposited along a dried dale near Shirataki Fall at Mt. Akita-Komagatake. The sinters contain such impression fossils as Fagus crenata Blume, Sasa kurilensis Makino et Shibata, and Prunus nipponica Matsum. They would have precipitated from low-temperature carbonated spring water gushing out at the border of the atrio, at the time of explosive activity on the southern foot of Mt. Medake in 1932.抄録全体を表示PDF形式でダウンロード (739K) -
一国 雅巳1979 年 13 巻 1 号 p. 13-17
発行日: 1979/06/30
公開日: 2016/11/14
ジャーナル フリーLeaf samples were taken from prince feather (Polygonum orientate L.) and a related species (Polygonum mitts Gilibert var. Nemoto) growing on the river beach of the Tamagawa River, Tokyo. Dried samples were chemically analyzed with the results shown in Table 2. A high manganese content found in some of the samples revealed the availability of the element in the swampy ground on which the plant grows. This is due to the reducing environment produced by organic matter in the sediment. Under reducing conditions, manganese is released as divalent ion and uptaken by plants. Organic matter also behaves as chelating agent toward many heavy metal ions. The leaf samples enriched in manganese often show high copper and zinc contents, thus indicating the accumulation of heavy metals in the soil. The mananese content of the plants may be useful as a geochemical indicator characterizing organic matter in the fluvial sediment and the soil.抄録全体を表示PDF形式でダウンロード (491K) -
鶴見 実1979 年 13 巻 1 号 p. 18-23
発行日: 1979/06/30
公開日: 2016/11/14
ジャーナル フリーAn inspection of the chemical composition of spring waters in Matsushiro, Nagano Prefecture, revealed that the Na/Mg ratio is closely related to the geographical locations of the springs. Two types of waters can be distinguished: one is magnesium-rich waters from the springs in the southeastern area, and the other, sodium-rich waters from the springs in the northwestern area of Matsushiro. The Ichiyo-kan spring, located at the boundary of the two areas, changed drastically the Na/Mg ratio before and after the swarm earthquakes, thus suggesting that the ratio can be used as an indicater of seismic activity in the area. The origin of the two types of the waters is also briefly discussed.抄録全体を表示PDF形式でダウンロード (477K)
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