硅铝胶改性膨润土的性能研究

摘要

The effect of the modification with silica-alumina gel on theadsorption of heavy metal and sinking property for bentonite and the adsorption of organic poison for CTMBA-bentonite were investigated in this work. The modified bentonites were analyzed with XRD and IR. The results indicated that the modification, which happened on the edges of bentonites, enhanced their adsorption of cobalt and the sinking ability. The gel improved the adsorption selectivity when the CTMBA-bentonites were used to adsorb organic compounds in water.%本文制备了硅铝胶改性的膨润土和硅铝胶-十六烷基三甲铵复合改性膨润土。研究了硅铝胶改性对膨润土的重金属离子吸附性能和在水介质中的沉降性能的影响，以及对有机膨润土吸附极性有机毒物能力的影响，并用XRD、IR对改性土进行了分析。结果表明：硅铝胶改性在膨润土端面发生，改性能显著提高膨润土吸附钴离子能力，改善其沉降性能；硅铝胶的存在增大了有机膨润土对水溶液中有机物的吸附选择性。