嫩江蛋白石页岩的结构及其吸附性能

Structure and Adsorption Properties of Nenjiang Opal Shale

对嫩江蛋白石页岩在600℃和1200℃之间进行了热活化处理,通过SEM、XRD和BET等测试手段对热处理前后的样品进行了表征,并测试了蛋白石页岩对罗丹明B溶液的吸附性能。结果表明:该蛋白石页岩主要由鳞石英和α-石英微晶经无序聚集形成,具有多孔状结构特征;原土比表面积平均高达82.856m2/g,并随热处理温度升高而略有增加,900℃时比表面积达最大值,此后随热处理温度的升高比表面积快速下降;对罗丹明B溶液的吸附速率快,脱色率可达96%以上。该蛋白石页岩吸附能力强、吸附速度快、热稳定性高,具有广泛的应用前景。

The opal shale is heated up to 600℃ to 1200℃ by heat treatment.The original and heated samples have been characterized by SEM and XRD,and the specific surface area is measured by the BET method.The adsorption capacity of the opal shale is tested by the rhodamine-B solution.The results show that the opal shale is made of microcrystalline tridymite and α-quartz.The specific surface area of the opal shale is up to 82.856 m2/g,increases with the rising temperature and reaches its maximum at 900 ℃.After 900 ℃,the specific surface area of the opal shale declines with the fatherly rising in temperature of heat treatment.The adsorption rate is fast,and the de-colorization rate could exceed 96%.With high adsorption capability,high adsorption rate and high thermal stability,the opal shale has wide application prospects.