光度法测定羟基铝交联蒙脱土的阳离子交换量

SPECTROPHOTOMETRIC STUDY OF CATION-EXCHANGE CAPACITY OF HYDROXYL-ALUMINUM MONTMORILLONITE

阳离子交换量(CEC)是交联蒙脱土性能的重要表征之一。本文采用光度法以埃铬青 R 为络合剂,系统地研究了由不同铝离子浓度、不同羟铝比的溶液作交联剂,所得到的羟基铝交联蒙脱土的 CEC。研究结果表明,CEC 随羟铝比的增加而增加,随温度的升高而降低,但受交联剂铝离子浓度的影响较小。

Cation-exchange capacities(CEC)of a number of hydroxyl-aluminum crosslinked montmorillonites with different concentrations of Al_^(3+) ion and OH/Alratios have been determined spectrophotometrically.The experimental resultsshow that the value of CEC is enhanced as the OH/Al ratio increased but reduc-ed as the temperature increased.However,there are no marked change inCEC with different concentrations of Al^(3+) ion.