Modification of Lampung and Bayah Natural Zeolite to Enhance the Efficiency of Removal of Ammonia from Wastewater

摘要

In this research,modification of Lampung and Bayah natural zeolites was carried out to increase the zeolite's capacity as an ammonia adsorbent.Natural zeolite is modified by acid treatment using 6 M HC1 and ion exchange using 1 M NH4NO3.The modification process continued with calcination at 500 °C for 4 h.X-ray fluorescence characterization shows changes in composition in the modified zeolites.The significant increase in the Si/Al ratio occurred in the modified zeolite with acid treatment that is 10.03 for Lampung natural zeolite HC1(LNZH)and 9.20 for Bayah natural zeolite HC1(BNZH).Surface area increases due to increasing Si/Al ratio.FTIR results indicate changes in the intensity of hydroxyl groups and pyrH~+ as a result of the increase in total acidity of zeolites.The zeolites performance test proves that the Bayah natural zeolite has a higher ammonia adsorption capacity than Lampung natural zeolite.Ion exchange-modified zeolite has a higher ammonia adsorption capacity than zeolite modified with acid treatment.