Effects of reaction conditions on the formation of todorokite at atmospheric pressure
文献类型：期刊论文
| 作者 | Cui, Hao-Jie; Feng, Xiong-Han; he, Ji-Zng He; Tan, Wen-Feng; Liu, Fan |
| 刊名 | CLAYS AND CLAY MINERALS
 |
| 出版日期 | 2006 |
| 卷号 | 54期号:5页码:605-615 |
| 关键词 | Birnessite Clay Mineral Mn Oxide Todorokite Transformation |
| 英文摘要 | Todorokite is a common Mn oxide (with a tunnel structure) in the Earth surface environment and can be obtained by hydrothermal treatment or refluxing process from precursor buserite with a layered structure. Several chemical reaction conditions for the phase transformation from Na-buserite to todorokite at atmospheric pressure were investigated, including temperature, pH, crystallinity of precursor Na-buserite, the amount of the interlayer Mg2+ of the Mg-buserite and clay minerals. The results showed that the conversion rate and crystallinity of todorokite decreased with falling temperature and Mg-buserite could not be completely transformed to todorokite at lower temperatures (40 degrees C). The poorly crystalline Na-buserite could be converted into todorokite more easily than highly crystalline Na-buserite. Todorokite can be prepared at pH 5-9, but the rate of conversion and crystallinity of todorokite did vary with pH in the order: neutral approximate to alkali > acidic. The conversion rate of todorokite decreased with decreasing interlayer Mg2+ content of the Mg-buserite. The presence of montmorillonite or goethite slowed the formation reaction of todorokite in the refluxing process, and the reaction time was prolonged when the amounts of those minerals were increased. |
| WOS记录号 | WOS:000241970300007 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23057]  |
| 专题 | 生态环境研究中心_土壤环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Cui, Hao-Jie,Feng, Xiong-Han,he, Ji-Zng He,et al. Effects of reaction conditions on the formation of todorokite at atmospheric pressure[J]. CLAYS AND CLAY MINERALS,2006,54(5):605-615. |
| APA | Cui, Hao-Jie,Feng, Xiong-Han,he, Ji-Zng He,Tan, Wen-Feng,&Liu, Fan.(2006).Effects of reaction conditions on the formation of todorokite at atmospheric pressure.CLAYS AND CLAY MINERALS,54(5),605-615. |
| MLA | Cui, Hao-Jie,et al."Effects of reaction conditions on the formation of todorokite at atmospheric pressure".CLAYS AND CLAY MINERALS 54.5(2006):605-615. |
入库方式： OAI收割
来源：生态环境研究中心
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