Kinerja Aktivasi dan Impregnasi Zeolit Alam sebagai Adsorben

Abstract

Performance of natural zeolites can be improved through the process of activation and impregnation. Activation process using HCl and impregnation with Mg²⁺ have carried out in this study. The activation process was performed out for 30 minutes with a 0.5M HCl solution and impregnation of MgCl₂.6H₂O 2.5M for 2 hours. Natural zeolites which have been activated and impregnated are then analyzed by the Scanning Electron Microscope-Energy Dispersive Spectrophotometer (SEM-EDS). The results of zeolite surface profile characteristics activated and impregnated using SEM-EDS showed that there were changes in morphology and functional groups. Then, activated and impregnated zeolites were used to absorb ammonia at various contact times of 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes and 45 minutes. The equilibrium point was obtained at 25 minutes contact time with adsorption capacity of 30.444 mg/g and absorption efficiency of 85.2352%. The dosage of adsorbent varied with 0.01% size; 0.03%; 0.05%; 0.07%; 0.09%; 0.11%, 0.13% m/v. The concentration of ammonia absorbed was performed out using an Uv-Vis Spectrophotometer. The best efficiency of ammonia absorption is 90.106% with particle size 110-120 mesh, adsorbent dose 0.09% and adsorbent impregnation treatment.