水溶液中における酸化マグネシウムの変質挙動

フォーマット:

論文

責任表示:

矢部, 太章 ; 福士, 圭介 ; 伊藤, 弘志 ; 窪田, 宗弘 ; 桝谷, 優輔

言語:

日本語

出版情報:

日本粘土学会 = the Clay Science Society of Japan, 2011-03-30

著者名:

• 矢部, 太章
• 福士, 圭介
• 伊藤, 弘志
• 窪田, 宗弘
• 桝谷, 優輔

掲載情報:

粘土科学 = Journal of the Clay Science Society of Japan

ISSN:

0470-6455      

巻:

49

通号:

3

開始ページ:

135

終了ページ:

140

バージョン:

publisher

概要:

金沢大学環日本海域環境研究センター<br />Magnesium oxide with high specific surface area (HS-MgO) has been widely used for the sorbent material for hazardous anions from contaminated solutions. Because the magnesium oxide is unstable under ambient cond … itions, alteration behavior of HS-MgO was investigated by batch alteration experiments as a function of time in electrolyte solutions under ambient and nitrogen atmospheres. The mineralogy of reacted solid was characterized by means of X-ray diffraction, scanning electron microscope and measurements of specific surface area. The solution chemistry of reacted solutions was examined by pH meter and high pressure liquid chromatography for measurement of dissolved Mg concentration. Periclase in HS-MgO almost completely transforms to brucite within 8 hours. The specific surface area decreases from 110m^2/g of unaltered HS-MgO to 60m^2/g by the alteration. The alteration process is characterized by dissolution of periclase and precipitation of brucite from solution. The rate limiting step of the transformation process is the dissolution of periclase. This study indicates that the alteration process must influence on the uptake of hazardous anion by HS-MgO. 続きを見る

URL:

http://hdl.handle.net/2297/35943