Removal Of Ammonium Nitrate From Aquaculture By Sorption Using Zeolite

Zeolite 4A was found to be useful and feasible method for removal of Ammonium nitrate from aquaculture waste water. These zeolites showed excellent sorption by ion-exchange. They can be successfully regenerated by using 0.1 M NaCl. The regenerated zeolites showed similar sorption capacity as virgin upto 3-4 cycles. During the following cycles their surface gets saturated with permanent sorption of nitrogen which reduces their sorption capacity. Modification of zeolite surface with strong acids leads to an increase (0.2602 gm of ammonium nitrate / gm of zeolite) in sorption capacity for ammonium nitrate. This shows that zeolites are excellent materials for removal of nitrogenous material from aquaculture waste water.