巻号一覧
5 巻 (1972)
- 1 号 p. 1-
5 巻, 1 号
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報文
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竹内 丑雄1972 年 5 巻 1 号 p. 1-12
発行日: 1972年
公開日: 2016/11/04
ジャーナル フリーVariation in the concentrations of some chemical constituents in precipitation was studied from January, 1967 through October, 1971 at Kichijoji, Tokyo. (1) Annual variation of Cl- and SO42- concentrations. The Cl- concentration shows the maximum in December and the minimum in April. The SO42- concentration reaches the maximum in December-January and the minimum in June. (2) Secular variation of Cl- and SO42- concentrations. There is a steadily increasing tendency from year to year, with a single exception of 1967-70 when SO42- concentration remains the same. (3) Chemical constituents concentrations in precipitation and air mass trajectories. Concentrations of constituents in precipitation depends on the trajectories of air masses from which precipitation is supposed to be derived. Precipitation derived from the air mass which has passed through the industrial area contains higher amount of Zn2+, Cl-, SO42- and Ca2+.抄録全体を表示PDF形式でダウンロード (790K) -
小穴 進也, 杉崎 隆一, 荻田 晴久, 石塚 明男, 清棲 保弘, 江場 弘樹1972 年 5 巻 1 号 p. 13-23
発行日: 1972年
公開日: 2016/11/04
ジャーナル フリーGround water samples were taken from 4 wells in Nagoya every 10 days from Dec. 1968 to May, 1971 and were analyzed for some ions dissolved in them in order to make clear the effect of metropolitan activities on the properties of ground water. 1) The fluctuation of water quality is more marked for pumped wells than for artesian wells. 2) In the water from wells near the seashore chloride content increases with increasing sodium content; saline water in shallower aquifers may contaminate waters in deeper aquifers. Inland well waters, on the contrary, reveal that the concentrations of chloride, magnesium and calcium decrease with water level depression, suggesting that the water of higher chlorinity in shallower aquifers is depleted owing to over-pumping, especially in summer. Chloride in shallower aquifers in the city is thought to be contaminated from the earth's surface in the central part of the city of marked metropolitan activities. 3) Many kinds of ions in the ground water mutually change their concentrations; a correlation between magnesium and calcium concentrations is, above all, pronounced. 4) The results of the successive observations present the general feature of the change in ground water quality under the influence of metropolitan activities.抄録全体を表示PDF形式でダウンロード (961K) -
鈴木 励子1972 年 5 巻 1 号 p. 24-27
発行日: 1972年
公開日: 2016/11/04
ジャーナル フリーArsenic was determined by the molybdenum blue method in 16 samples of calcareous sinters. Although hot spring waters always contain a small amount of arsenic, no arsenic was detected from most of samples. Only those associated with hydrous ferric oxide showed a high arsenic content (e. g., 0.61% for the calcareous sinter from the Masutomi Hot Springs). It was experimentally shown that calcium carbonate carries down arsenic (V), while leaving in solution arsenic (III). Thus arsenic is considered to be dissolved as trivalent species in hot spring water, if these waters give birth to arsenic-free calcareous sinters.抄録全体を表示PDF形式でダウンロード (368K) -
手塚 [アキラ]1972 年 5 巻 1 号 p. 28-37
発行日: 1972年
公開日: 2016/11/04
ジャーナル フリーThe concentrations of uranium and thorium in the apatite separated from volcanic rocks are higher than those in dacitic volcanic glasses, but in general far less than those in apatite reported on granitic rocks. The partition of thorium between apatite and groundmass of volcanic rocks is almost constant, but that of uranium varies in a wide range. It seems that the measured partition of uranium between apatite and groundmass is strongly affected by uranium rich small minerals in the apatite. Local concentration of uranium within apatite grains was confirmed by fission track method. The application of apatite for the ionium dating is discussed based on those analytical results and seems to be useful, when the rock sample contains apatite which would be easily separated from the other minerals, for example, by the leaching method.抄録全体を表示PDF形式でダウンロード (2367K)
例会講演要旨
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鈴置 哲朗, Samuel EPSTEIN1972 年 5 巻 1 号 p. 38-44
発行日: 1972年
公開日: 2016/11/04
ジャーナル フリーPDF形式でダウンロード (787K)
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