|
|||||
|
|
| 含铬蒙脱石中铬离子占位位置研究 | |
| 引用本文： | 努尔太·麦地娜,图尔荪·麦尔旦,蔡元峰,王洪涛,潘宇观.含铬蒙脱石中铬离子占位位置研究[J].高校地质学报,2014,20(4):558. |
| 作者姓名： | 努尔太·麦地娜 图尔荪·麦尔旦 蔡元峰 王洪涛 潘宇观 |
| 作者单位： | 1. 内生金属成矿机制研究国家重点实验室 2. 南京大学地球科学与工程学院,南京,210023 |
| 基金项目： | 南京大学创新项目(2012G1210284013)；国家自然科学基金 |
| 摘 要： | 采用提纯后的蒙脱石在不同浓度硫酸铬溶液中进行交换吸附制备了含铬蒙脱石，并利用包括粉末X射线衍射术 （XRD）、电子自旋共振谱术（ESR） 和傅里叶变换红外吸收光谱术（FTIR） 等分析测试手段对铬在蒙脱石中的吸附位置进 行了探索研究。研究结果显示铬离子不仅置换了层间域中的Ca2+，K+和Na+等，而且置换了位于八面体位的Mn2+ 和少量 Al3+，并较大量的进入硅氧四面体的六边形孔洞、甚至有可能置换极少量的四面体位的Al3+和Fe3+等。此外，根据X射线衍 射分析可知，在0.2 mol/L硫酸铬溶液中充分交换吸附后的蒙脱石存在两层水型和单层水型两种含铬蒙脱石，其水合阳离子 分别为Cr(H2O)6]3+和Cr(H2O)3O3]3+，当吸附量增大至一定程度后水合铬离子借助TOT结构片的硅氧四面体的底氧形成配位多 面体。 |
| 关 键 词： | 含铬蒙脱石 阳离子占位 谱学分析 |
Cation Occupation Study for a Chromium Bearing Montmorillonite |
|
| MAIDINA Nuertai,MAIERDAN Tuersun,CAI Yuanfeng,WANG Hongtao,PAN Yuguan.Cation Occupation Study for a Chromium Bearing Montmorillonite[J].Geological Journal of China Universities,2014,20(4):558. | |
| Authors: | MAIDINA Nuertai MAIERDAN Tuersun CAI Yuanfeng WANG Hongtao PAN Yuguan |
| Abstract: | The purified montmorillonite with trace amounts of quartz was subjected to different concentration chromium sulphate solutions for one week cation exchange. The obtained chromium bearing montmorillonites were verified and tested using powder X-ray diffractometry (XRD), X-ray Flourence (XRF), Electron Spin Resonance (ESR) spectrometry and Frourie Transforming Infrar (FTIR) to explore the occupation site of chromium. The results suggested that the Cr3 + exchanged some of the cations in octahedral or minor cations in tetrahedral sites, such as Mn2+, Al3+ in octahedrons and Al3+ and Fe3+ in tetrahedrons, as well as the cations in the interlayer space of montmorillonite, such as Ca2+, K+ and Na+ etc. Furthermore, based on the XRD analyses, two types of montmorillonites with different kinds of hydration cations were present in the 0.2 mol/L chromium sulphate solutions. The hydration cations were Cr(H2O)6]3+ and Cr(H2O)3O3]3+, respectively. The species of hydration cation were constrained by the concentration of the chromium solution. |
| Keywords: | chromium montmorillonite cation occupation spectroscopical analysis |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《高校地质学报》浏览原始摘要信息 | |
| 点击此处可从《高校地质学报》下载全文 | |
