Measurement of the Cation Exchange Capacity of Vermiculite by Ammonium Chloride-Ethanol Method

详细信息   

• 责任者：Li Xuemei (School of Material Science and Technology ; China University of Geosciences ; Beijing 100083 ; China) ; Liao Libing
• 刊名：Rock and Mineral Analysis
• 出版年：2008
• 卷期：27(3)
• 关键词：蛭石 ; vermiculite ; 阳离子交换容量 ; cation exchange capacity
• 页码：p.204-206
• 图表：10 refs.)&
• 分类号：0900
• issnNo：ISSN0254-5357
• isbnNo：CN11-2131/TD

摘要

The cation exchange capacity (CEC) of vermiculite concentrate is measured by ammonium chloride-ethanol method. The results show that vermiculite particles must be sufficiently dispersed and wetted to make the vermiculite interlayer cations entirely exchange with NH₄⁺ in ammonium chloride-ethanol solution. The formic acid content must be deducted when NH₄⁺ content is measured by formol titration method. To get accurate results, the titrated solution of ammonium chloride-ethanol should not be heated before it is titrated with NaOH standard solution. The measured CEC of vermiculite concentrate is 60.8824×10-3 mol/100 g.