凹凸棒石与Zn^(2+)的长期作用研究  

A Study on Long-Term Interaction Between Palygorskte and Zn^(2+)

作　　者：谢晶晶[1] 陈天虎[1] 王健[2] 谢巧勤[1] 刘海波[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]合肥市市政设计院有限公司,安徽合肥230009

出　　处：《矿物学报》2011年第4期738-741,共4页Acta Mineralogica Sinica

基　　金：国家973项目(编号:2007CB815603);国家自然科学基金(编号:41072035);博士启动基金(2010HGBZ0284)

摘　　要：以凹凸棒石与Zn2+为例研究粘土矿物与重金属离子长期作用过程,并运用高分辨透射电镜和X射线衍射分析粘土矿物与重金属离子长期作用的次生物相。结果表明:Zn2+与凹凸棒石的长期作用是一个二阶段的过程,初始阶段为快速吸附作用,其后表现为慢速沉淀反应。高分辨透射电镜和X射线衍射分析表明,凹凸棒石与Zn2+的长期作用过程中,具有纳米矿物特性的凹凸棒石表面快速水化,提高了悬浮液的pH值,诱导Zn2+水解沉淀。而后,凹凸棒石缓慢溶解释放Al3+和SiO44-与Zn(OH)2沉淀反应,形成Zn-A1双氢氧化物和异极矿。这一结果对认识土壤环境中重金属与粘土矿物的作用及重金属的归宿具有重要意义。The long-term interaction between clay mineral and heavy metal ions was studied with palygorskite and zinc ions.The secondary phase formatted in the long-term interaction was investigated with TEM and XRD.The results showed that the long-term interaction between palygorskite and Zn2＋ was a process of initially quick absorption reaction and next slow precipitation reaction.The investigations of TEM and XRD showed that the surface of Nano-minerals palygorskite hydrated quickly,pH of the solution was increased,and the hydrolysis of Zn2＋ was induced in the process of long-term interaction.After that,the palygorskite dissolved slowly and released Al3＋ and SiO44-which could have precipitation？reaction with Zn（OH）2,and formed Zn-A1 double hydroxide and calamine.

关 键 词：凹凸棒石 重金属离子 吸附 长期作用 

分 类 号：P578.964[天文地球—矿物学] P579[天文地球—地质学]