官山凹凸棒石饱和吸附锶銫核素后的结构表征  

Composition and Characterization of Palygorskite in Guanshan with Simulative Sr and Cs Radionuclides Adsorpted

作　　者：易发成[1] 傅依备[2] 李玉香[1] 金承黎[1] 

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《中国矿业大学学报》2007年第2期271-276,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(10376028)

摘　　要：通过对安徽官山凹凸棒石饱和吸附Sr,Cs模拟核素前后的化学成分分析、并用X衍射分析、红外光谱分析和热分析等手段方法,分析探讨了Sr,Cs模拟核素在凹凸棒石的赋存状态.研究结果表明,凹凸棒石与模拟核素Sr,Cs之间主要以离子交换的方式发生作用,Sr2+,Cs+主要取代凹凸棒石的可交换离子Na+,占据凹凸棒石层间位和八面体位,部份是多面体断键所发生的吸附.其结果导致结构发生一定的变化,表现为结晶度下降、晶胞体积增大、晶格发生畸变.Depositing state of absorbed simulative nuclides Sr^2＋ and Cs^＋ in Guanshan palygorskite is explored by means of chemical composition analysis, X radial diffraction analysis and infrared spectral analysis. The results show that ion-exchange is the primary way between palygorskite and simulative nuclides Sr^2＋ and Cs^＋ ;Sr^2＋ and Cs^＋ mainly replace the exchangeability ion Na^＋ , hold interlaminar and octahedron place in palygorskite. Some absorption is caused by broken polyhedral key, which results in the change of crystal structure, decline of crystallinity, and swelling of crystal cell and aberrance of crystal lattice.

关 键 词：凹凸棒石 Sr Cs 离子交换 晶格畸变 

分 类 号：TD875[矿业工程—非金属矿开采]