提高新疆蛭石粉体阳离子交换容量的方法研究

Study on Different Means on Improving Cation Exchange Capacity of Xinjiang Vermiculite Powder

以新疆尉犁蛭石粉体为原料探讨了硫酸活化、焙烧活化、氯化钠改性、十六烷基三甲基溴化铵改性等方法对蛭石粉体阳离子交换容量的影响。结果表明,450℃焙烧2h,蛭石粉体阳离子交换容量可提高17.5%以上;0.1mol/L氯化钠和200%CEC的十六烷基三甲基溴化铵活化处理均可使蛭石粉体阳离子交换容量提高9%左右;0.1mol/L硫酸活化处理对提高蛭石粉体的阳离子交换容量效果不明显,仅提高了2.24%。还深入讨论了改性提高粘土阳离子交换容量的机理。

This paper studied the cation exchange capacity （CEC） of vermiculite which from Yuli Mine in Xinjiang have been treated with different methods and different substances. The results indicate that the CEC can increase 17.5% when venniculite powder is to be calcined at 450℃ for 2h. In addition, CEC of vermiculite treated with 0.1mol/L NaCl or 200% CEC hexatdmethlammonium can increase about 9%, but the CEC of vermiculite treated with 0.1mol/L H2SO4 improves little, only 2.3%. The mechanism of improving venniculite＇s CEC by modify cation were discussed and analysed in detail.