室内実験における石灰岩の溶解特性に関する一考察

• 高屋 康彦

  筑波大学大学院生命環境科学研究科地球環境科学 埼玉大学地圏科学研究センター

• 廣瀬 孝

  琉球大学法文学部人間科学科

• 青木 久

  琉球大学大学院理工学研究科21世紀COEプログラム

• 松倉 公憲

  筑波大学大学院生命環境科学研究科地球環境科学

書誌事項

タイトル別名

• Dissolution Characteristics of Limestone in Laboratory Experiments
• シツナイ ジッケン ニ オケル セッカイガン ノ ヨウカイ トクセイ ニ カンスル イチ コウサツ

抄録

The results of three laboratory experiments in a batch (closed) system were reexamined to elucidate the influence of some factors related to the dissolution characteristics of limestone;Experiment A : an experiment in which the samples (200 g in weight) crushed to fragments with three kinds of grain size (coarse : a diameter of 45-32 mm; medium : 16-8 mm; and fine : 2-1 mm) were treated with distilled water under various solid/liquid ratios (0.25, 0.5, and 1) over 960 hrs (40 days); Experiment B : an experiment in which clay-size powder sample (1.00 g in weight) or a block sample (3.54×3.54×20 mm³) was treated with distilled water (50.0 mL) over 417 hrs (ca. 17 days); Experiment C : an experiment in which a block sample (5.0×5.0×40.0 mm³) was treated with distilled water (250.0 mL) at various temperatures (5, 50, and 75°C) over 2164 hrs (ca. 90 days). Electric conductivity (EC) of aqueous solution, as an index of solute concentration, was measured.<BR>Experimental results showed that (1) surface area of crushed samples and temperature influence the dissolution rate less than solid/liquid ratio, (2) the dissolution rates at the initial stage of reaction are influenced by both physical property of rock (porosity) and water temperature, and (3) the rate-determining step at the initial stage is a mass transport process (e.g., diffusion of ions in solution). Therefore, it is necessary for the continuous dissolution of limestone to prompt the transport of dissolved materials. In other words, a condition for it is to send water undersaturated with respect to carbonate minerals into the rock surface by stirring a solution in a batch (closed) system experiment.

収録刊行物

• 地学雑誌

  地学雑誌 115 (2), 136-148, 2006

  公益社団法人 東京地学協会

キーワード

• 石灰岩
• 溶解
• 表面積
• 物質移動
• 室内実験

詳細情報

• CRID: 1390001204230609664
• NII論文ID: 10020539444
• NII論文ID: 10025885082
• NII書誌ID: AN00322536
• DOI: 10.5026/jgeography.115.2_136
• ISSN: 18840884
• ISSN: 0022135X
• NDL書誌ID: 8053083
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8053083
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可