Adsorption of Ammonia Nitrogen by Silicon-Based Zeolite Filter Material

The silicon-zeolite filter material is prepared using natural clinoptilolite as raw material.Taking it as additives,we investigated the adsorption of ammonia nitrogen in wastewater on it and analyzed its adsorption mechanism and ion exchanging behavior through Langmuir and Freundlich cures which describe the relation between mass concentration and the amount of adsorption.Experimental results show that the silicon-based zeolite filter material follows the national standard,and its static adsorption capacity of ammonia is up to 150 mg/g,which is 5 times that of natural zeolite;the adsorption of ammonia nitrogen on the silicon-based zeolite filter material is the results of physical adsorption and chemical adsorption;in a certain range of initial ammonia concentration,the removal of ammonia by the silicon-based zeolite increases with the increase of initial ammonia concentration,the highest being 62.7%,which is higher than that of natural zeolite.