CAJ | 학술논문

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。
채용제순후적몽탈석재불동농도류산락용액중진행교환흡부제비료함락몽탈석，병이용포괄분말X사선연사술（XRD）、전자자선공진보술（ESR）화부리협변환홍외흡수광보술（FTIR）등분석측시수단대락재몽탈석중적흡부위치진행료탐색연구。연구결과현시락리자불부치환료층간역중적Ca2+，K+화Na+등，이차치환료위우팔면체위적Mn2+화소량Al3+，병교대량적진입규양사면체적륙변형공동、심지유가능치환겁소량적사면체위적Al3+화Fe3+등。차외，근거X사선연사분석가지，재0.2 mol/L류산락용액중충분교환흡부후적몽탈석존재량층수형화단층수형량충함락몽탈석，기수합양리자분별위[Cr(H2O)6]3+화[Cr(H2O)3O3]3+，당흡부량증대지일정정도후수합락리자차조TOT결구편적규양사면체적저양형성배위다면체。
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.