Adsorption Properties of Modified Zeolite for Ammonia Removal

In order that ammonia could be removed effectively from wastewater, zeolite has been modified and be used for adsorbing the ammonia. Meanwhile the chemical ingredient and surface analysis of zeolite has been investigated. SEM of modified zeolite showed that there were lots of cavities and multitudinous holes with medium and macropores diameters. Such structure would be very useful to help NH₄⁺ ions enter into the pore in the zeolite. And the pore system of modified zeolite was simple, the pore diameter was middle pore with fewer surface areas. These structures of modified zeolite would be helpful to carry out ions exchange. The adsorption results showed that the data were fit to Langmuir isotherms for ammonium ion uptake onto modified zeolite. Thus the modified zeolite was suggested as a suitable material for adsorbing ammonia.