粤西徐闻九亩硅藻土热处理前后结构的变化及对Zn^(2+)吸附性能的影响  

Structural Changes of Diatomite in Thermal Treatment and Their Effect on Zn^(2+) Adsorption from Xuwen,Guandong Province

作　　者：杨志军[1] 韦彩慧[1] 葛云[1] 彭明生[1] 苏育炜[1] 李红中[1] 周永章[1] 

机构地区：[1]中山大学地球科学系//地球环境与地球资源研究中心,广东广州510275

出　　处：《中山大学学报（自然科学版）》2007年第3期107-111,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省科技计划资助项目(2006B37001001);中山大学本科科研资助项目;广东省科技厅重大专项攻关资助项目(2004A3030800;2005A30402006);广东省自然科学基金研究团队资助项目;国土资源部农业地质与生态地球化学调查资助项目(121201511216)

摘　　要：粤西徐闻九亩硅藻土热处理前后的SEM、XRD、FTIR研究表明:800、1000℃热处理下,硅藻土微观结构没有太大的变化,但至1200℃时,管状壁孔洞发生破碎。同时,主要矿物组成会由蛋白石变成方英石;热处理可以对硅藻土进行提纯,但温度不宜达到1200℃。热处理前后硅藻土对Zn2+的吸附实验表明:硅藻土可以用于吸附水体中的Zn2+,且热处理可以改善其吸附能力,但不同质量的硅藻土所要求的热处理温度不尽相同。The results obtained from micro-structure analysis of raw and thermal treated diatomite at 800℃, 1 000℃ and 1 200℃ show that there are not notable structural changes at 800℃ and 1 000℃ treatment. When it was heated at 1 200℃, its composition and structure changed a lot. To purify SiO2 from diatomite by heating it, the temperature should not exceed 1 200℃. In addition, diatomite is a kind of effective environmental material due to the adsorption of Zn^2＋ The Zn^2＋ adsorption ability of diatomite will be improved when diatomite is heated. The thermal treated temperature is different when the quality of diatomite is different.

关 键 词：硅藻土 热处理 ZN^2+ 吸附 

分 类 号：P574[天文地球—矿物学]