※一部利用できない機能があります
| 1.
論文 |
論文
|
石渡, 明 ; 笹谷, 啓一 ; 田崎, 和江 ; 坂本, 浩 ; 中西, 孝 ; 小村, 和久 ; 辻森, 樹 ; 大浦, 泰嗣 ; 宮本, ユタカ ; 赤羽, 久忠 ; 渡辺, 誠 ; 布村, 克志 ; Ishiwatari, Akira ; Sasatani, Keiichi ; Kazue Tazaki, ; Sakamoto, Koh ; Nakanishi, Takashi ; Komura, Kazuhisa ; Tsujimori, Tatsuki ; Oura, Yasuji ; Miyamoto, Yutaka ; Akahane, Hisatada ; Watanabe, Makoto ; Nunomura, Katsushi
概要:
金沢大学理工研究域地球社会基盤学系
|
||||
| 2.
論文 |
論文
|
田崎, 和江 ; Tazaki, Kazue
概要:
金沢大学理工研究域地球社会基盤学系<br />By using a transmission electron microscope (TEM) equipped with an energy dispersive electron-mic
…
roprobe analyzer, genetical relationships between micro-morphology and chemical composition of kaolin minerals were investigated.The TEM observation revealed that the kaolinite specimens, which show a 7Å basal reflection in X-ray diffraction diagram, are commonly mixtures of particles with various morphology such as film, hexagonal plate and long tube (Table 1). The chemical compositions of these kinds of particles are different from one another as shown in Fig. 1 and 2. Triangular plot of SiO2, Al2O3 and ΣFeO of the Kibushi clay (No.7 in Fig.2) shows limited chemistry of each morphology with slight overlap that SiO2 content of the film of indefinite primitive form is less than that of hexagonal plate, whereas, ΣFeO is lower in the latter. However, the chemistry of the Austria kaolin (No.5 in Fig.2) shows the reverse trend in SiO2 content. This reverse trend might suggest the difference in the source material.
続きを見る
|
||||
| 3.
論文 |
論文
|
田崎, 和江 ; 野中, 資博 ; 森, 忠洋 ; 野田, 修司 ; Tazaki, Kazue ; Nonaka, Tsuguhiro ; Mori, Tadahiro ; Noda, Shuji
概要:
金沢大学理工研究域地球社会基盤学系<br />Mortar bars are exposed to H2S gas (25-300ppm) for 10 months at 12-30C°. Sulfate-generated deteri
…
orations in the mortar bars include expansion, cracking and disintegration. The heavily corroded mortar bar produced gypsum, calcite and secondary ettringite with a trace amount of barite. The secondary ettringite shows the same chemistry as the primary ettringite, but the morphology is quite different from the primary one. Ettringite crystals with sharp point, 10-20μm long, are primary formed during the hydration of mortar bar, whereas small lath-shaped crystals, about 3μm long as observed by SEM are high concentration of hydroxyl ions. Gypsum, calcite and the secondary ettringite are formed step by step under acidic condition. The iron oxides layer is presented significantly between corroded and un-corroded zones which is the same process of deterioration on portland cement concrete.
続きを見る
|
||||
| 4.
論文 |
論文
|
田崎, 和江 ; Tazaki, Kazue
概要:
金沢大学理工研究域地球社会基盤学系<br />Our atmosphere, oceans, sediments and soils, all reflect major or minor influences of the biosphe
…
re. In the sediments, erosion of the topsoil, complex mixture of clay minerals and carbon compounds, is one of crisis in the world economy. Clay mineralogist concerned with the sediments and mineral deposits must understand weathering processes plus microorganisms in detail. Bacteria must be important in all transport processes of elements between sediments and water systems. In the atmosphere, fine particles, such as clays, loess and fly ash produced by combusion of fossil fuels are biologically and chemically recycling in our planet. The consequences of a massive increase in the use of coal or other fossil carbon sources give the global atomospheric increase of CO2N2O, acid gases, etc.Modern electron microscopic techniques and the new array of computer surface techniques, ESCA, Auger, SIMS, etc. have made it possible to see Å level structures, and chemistry of the fine particles. Examples of such fine mineralogical particles in the surface environment are described in this paper.
続きを見る
|
||||
| 5.
論文 |
論文
|
田崎, 和江 ; Tazaki, Kazue
概要:
金沢大学理工研究域地球社会基盤学系
|
||||
| 6.
論文 |
論文
|
上島, 雅人 ; 田崎, 和江
概要:
Microorganisms are influential in environmental earth materials. Elemental circulation, environmental changes and the Earth evolution have been associated with microorganisms. In this study, biomineralization of clay minerals and
…
biodegradation of K-feldspar and biotite in granite were identified by XRD, optical microscope, SEM-EDX, TEM and atomic absorption. Bioweathering experiments were carried out using thin section of granite in freshwater with iron bacteria (Toxothrix and Gallionella) at Omma Formation, Ishikawa Pref., Japan. Microbial mats were formed on the surface of the thin section after 3 and 10 days. Cavities and chaps with bacilli and filamentous bacteria were observed on the surface of feldspars and biotite. Si content was reduced at flake materials (Si:Al=3:2) with bacilli on the surface of K-feldspar. K and Si release was recognized in the solution of both K-feldspar and biotite immersed in the freshwater after a 2 months aging. TEM observation and electron diffraction analyses revealed that kaolinite formed on the surface of K-feldspar immersed in the freshwater after 2 months, suggesting K and Si were released from K-feldspar by bacteria to form kaolinite. The results suggest that the weathering of granite were accelerated by microorganisms to offer the nutrients such as K-ion.
続きを見る
|
||||
| 7.
論文 |
論文
|
田崎, 和江 ; 野村, 正純 ; 馬場, 奈緒子 ; Tazaki, Kazue ; Nomura, Masazumi ; Baba, Naoko
概要:
金沢大学理工研究域地球社会基盤学系<br />2007年3月25日9時41分にマグニチュード6.9の地震が石川県能登半島を襲った.その地震のため1〜2週間電気や水道が止まった.住民は近所の井戸,湧き水,山水を注意深く使用した.なぜならば,地
…
震後のそれらの水は,泥などで色が変化し,pHも硫酸イオンのために中性から酸性に変化し飲料不可になった井戸水があったからである.一方,地震から2ヶ月後の6月初旬,石川県七尾市中島町において、亀裂や陥没等々の地下構造の変化のため,海水が水田に浸透し稲が枯れる塩害が発生した.塩害が発生した水田を始め,周辺の用水路,貯水池の水を現地で測定したところ,pH8を示し電気伝導度(EC)も高い値を示した.また,塩害を起こした水田の土壌と稲を蛍光X線分析により定量分析をおこなったところ高濃度の塩素のほか典型的な塩害現象を示すNa,S,Feが高濃度に検出された.<br />The Noto Hanto Earthquake with a magnitude of 6.9 struck off the North coast of Ishikawa Prefecture that occurred at 9 : 41 a.m. on the 25th March 2007. It was an undersea earthquake with an epicentre of about 30km Southwest of Wajima, shaking up the Hokuriku district and cutting electricity and drinking water system for 1-2 weeks. All residents, especially those who are near the hardest hit areas, were advised to use drinking water collected from springs, wells and mountain natural waters with extra caution, because the water had become muddy after the quake. Some of waters were shifted from neutral to acidic pH (pH 5) that was not drinkable due to SO4_2- On the other hand, the rice fields were also damaged by sea salt after 2 months of the earthquake, because of several factors to consider, such as cracks, faults, and subsidence near reservoir water for rice field irrigation at Nakajima-machi, Nanao City, Ishikawa Prefecture at the beginning of June 2007. The field measurements of the pH of the water (pH 8) and high electrical conductivity (EC) suggest that seawater flowed into the rice fields, which agreed with X-ray Fluorescence quantitative analysis, showing high chlorine content. The soil and rice at damaged fields indicated high Na, S, Cl, and Fe contents, showing typical phenomenon of sea-salt damage. Farmers have asked the government for compensation and prevention of the damaged rice fields even after 2-3 months of the earthquake.
続きを見る
|
||||
| 8.
論文 |
論文
|
田崎, 和江 ; 国峯, 由貴江 ; 森川, 俊和
概要:
In 1985, Dashidaira dam with discharge gate had been built for the first time in Japan, at Kurobe River in Toyama Prefecture. Six years later, in 1991, the dam sediments were flushed out for the first time and impacted on the downstream of
…
Kurobe River. The dam sediments and the suspension contained a large amount of organic matter (with high C, N and S contents) with sludge-smell. The annual catch of bentic fishes (exp. flatfish) and the annual haul of wakame seaweed have been decreased year by year since the first discharge of the dam sediments in 1991. Until now, it has been reported that the sludge has deposited in the Toyama Bay which is apprehensive of influence of discharged dam sediments, because suspended particles affect the fish's gill respiration. In this study, suspension of river water were collected at three bridges during discharge from Dashidaira and Unazuki Dam in June 19th-22nd and in June 30th-July 2nd, 2001. River water quality and suspended solid were analyzed chemically, physically and mineralogically. Extremely low DO and Eh values were observed at the periods during first discharge in June 19th-22nd at two bridges. Moreover, during second discharge in June 30th-July 2nd, DO and Eh values were constant. Therefore it was shown that drastic decreased of DO and Eh values were a peculiar phenomenon during first discharge in June 19th-22th, 2001. The results of NCS elemental analyses were suggested that high organic contents were related with drastic decreased of DO and Eh values. Clay mineralogy of both Unazuki Dam sediments and suspended solid on the seabed at the offing of Kurobe River mouth, show abundant semctite with chlorite, mica clay minerals and kaolin minerals, suggesting those are the almost same origin. The dam sediments associated with organic matter impacted on downstream and the seabed, and was the cause of affecting bentic fishes and wakame seaweed.
続きを見る
|
||||
| 9.
論文 |
論文
|
奥田, 浩 ; 佐々木, 直哉 ; 佐藤, 大介 ; 津根, 明 ; 長谷川, 香織 ; 大杉, 嘉秀 ; 鷹野, 悦子 ; 田中, 浩司 ; 星野, 秀洋 ; 奥野, 正幸 ; 田崎, 和江
|
||||
| 10.
論文 |
論文
|
高橋, 直人 ; 田崎, 和江 ; Takahashi, Naoto ; Tazaki, Kazue
概要:
金沢大学理工研究域地球社会基盤学系<br />金沢大学角間2号井戸(深度150m,取水区間深度62〜73m,同78.5〜95m,同106〜138m)では,これまで地下水位・地下水温・電気伝導度の自動観測を行っており, 2007年3月25日に
…
発生した能登半島地震前後における10分間隔の詳細な経時変動データを取得することができた.地下水位は,揚水ポンプの停止時に深度31m,稼動時には深度39m程度の値を示した.電気伝導度は,ポンプの停止時に18.2mS/m,稼動時には18.7mS/mの値を示した.季節変動として,夏〜秋にわずかに高く,冬〜春にかけて低くなる現象が見られている.地下水位および電気伝導度については,地震の前後で異常な水位変動は見られなかった.地下水温は,地震時直近のポンプの停止時に12.3℃,稼動時に12.6℃の値を示した.通常地下水温は夏に低く,冬に高い傾向が見られているが,能登半島地震の前約2週間の間,地下水温が約0.5℃高い傾向が継続する現象が見られた.この傾向はポンプの稼動・停止や,気温,通年の季節変動傾向などとは異なるパターンの変動であった.今後は,より震央に近い地域における地下水位・水温・水質の観測記録との照合や,余震にともなう変化の観察などの再検証が必要であるものと考える.<br />The effect on groundwater in Kakuma-No.2-well at Kanazawa University by the Noto Hanto Earthquake struck at 9:41 a.m. 25th March 2007, reported in this study. The groundwater level indicated 39m in depth during operation, whereas the level indicated 31m in depth without operation. The electric conductivity (EC) of the groundwater during operation showed 18.7mS/m, whereas the EC showed 18.2mS/m without operation, using automatic measurement system. The EC tend to be higher in summer-autumn than that of winter-spring, which had not changed the value before and after the earthquake. On the other hand, the groundwater temperature showed 12.6℃ during operation whereas the temperature showed 12.3℃ without operation. The temperature clearly increased 0.5℃ for 2 weeks before the earthquake, and decreased the temperature after the earthquake. The results suggest that the earthquake gave the effect on the groundwater temperature as well. We need comparison with the record collected from the nearest area of epicenter in our future work.
続きを見る
|
