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酸浸和焙烧对硅藻土性能的影响
作者:郑水林 王利剑 舒锋 陈俊涛  
单位:中国矿业大学化学与环境工程学院 中国矿业大学化学与环境工程学院 洛阳工业高等专科学校材料工程系 河南洛阳471003 中国矿业大学化学与环境工程学院 中国矿业大学化学与环境工程学院  北京100083 北京100083 北京100083 北京100083 
关键词:硅藻土  焙烧  酸浸  吸附 
分类号:TB383.4
出版年,卷(期):页码:2006,34(11):1382-1386
DOI:
摘要:
采用酸浸和焙烧法对硅藻土进行了提纯处理,通过扫描电镜和能量色散X射线分析及Brunauer–Emmett–Teller法测定比表面积等测试手段对提纯前后的硅藻土进行了表征;并研究了硅藻土对罗丹明B溶液的吸附性能。结果表明硅藻土的比表面积随焙烧温度的提高而增加,450℃时达最大值,此后随焙烧温度的升高而下降;72%浓度的硫酸处理后的硅藻土中SiO_2含量显著提高,Fe2O3含量下降,比表面积增大,对罗丹明B溶液的吸附性能明显提高。
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Diatomite was treated with sulfuric acid and calcined to remove impurity. The crude diatomite and purified diatomite were characterized by scanning electron microscopy, energy dispersive X-ray analysis, and the specific surface area of crude and purified diatomite was measured by the Brunauer–Emmett–Teller method. The adsorption capacity of the diatomite on rhodamine B solution was studied. The results show that the specific surface area of the diatomite increases with the increase of calcination temperature and has a maximum value at 450 ℃. When the temperature is greater than 450 ℃, the specific surface area of calcined diatomite de-creases with the increase of calcination temperature. After diatomite is treated using sulfuric acid with a concentration of 72% in mass, the SiO_2 content increases, the Fe2O3 content decreases, the specific surface area increases remarkably, and the adsorption ca-pacity of the diatomite on rhodamine B solution can be improved effectively.
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基金项目:
吉林省科技创新基金(2004107)资助项目。
作者简介:
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参考文献:
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