Study on clay mineralogical characteristics of calcareous and noncalcareous soils of Bangladesh.
スポンサーリンク
概要
- 論文の詳細を見る
Clay mineralogical compositions of calcareous and noncalcareous floodplain soils which are most widely distributed over Bangladesh were investigated.<BR>The calcareous soils formed over the Gangese sediments are more alkaline having high extractable bases than the noncalcareous soils of the Bahmaputra sediments.<BR>The compositions of clay minerals of both the soils were constituted mainly of 14, 10 and 7 Å components. Of them, mica was commonly observed abundantly with the smaller amounts of kaolinite, chlorite and the interstratified minerals of these components. Especially, the noncalcareous soil clays were dominated by mica.<BR>The main characteristics for both the soil groups were observed in the 14 Å constituents, i.e. the calcareous soil clays were smectitic and the noncalcareous were vermiculitic. The noncalcareous soil clays were characterized by the absence or very low contents of smectite and the high contents of vermiculite, while, the calcareous clays always contained considerable amounts of smectite with a trace to moderate amounts of vermiculite. Moreover the relative high contents of hydroxy-Al interlayering components were existed in all clays and they were identified as Al-vermiculite in the noncalcareous soils and Al-smectite in the calcareous soils. sediments.<BR>It was considered that smectite in the calcareous soils and vermiculite in the noncalcareous soils were inherited principally from their parent sediments of the Ganges and the Brahmaputra, respectively, followed by pedogenetic process to form hydroxy-Al polymer in their interlayer.
- 日本粘土学会の論文
日本粘土学会 | 論文
- 23.エトリンガイト生成反応を利用する土質安定方法
- 高レベル放射性廃棄物地層処分におけるベントナイト緩衝材変質現象に関する最近の研究と今後の研究展開
- P13 断層粘土の脱水反応と摩擦強度の変化
- B16 抗がん剤/層状複水酸化物ナノ複合体の合成とその細胞毒性(口頭発表,一般講演)
- A19 ペプチド修飾を施した5-フルオロウラシル/層状複水酸化物複合体の合成とその細胞輸送効率(口頭発表,一般講演)