Zeolite Coating with Phenantroline for Adsorption of Ion Fe (III)

Natural zeolite contains impurities such as Na, K, Ca, Mg and Fe and has poor crystallinity. The presence of these impurities can reduce the activity of zeolites. To improve the character of natural zeolite, activation and modification are carried out first. In addition to removing impurities contained in natural zeolites, zeolite activation processes are also used to modify the properties of zeolites, such as surface area and acidity. One of the advantages of zeolites is that they have a surface area. and readily modifiable acidity when used as an adsorbent. This research aims to; find out the natural zeolite coating process using phenantrolin; find out the pH of the solution against the adsorption process of iron (III) metal ions using phenanthrolin coated zeolites; find out the effect of other metals on the adsorption process of iron (III) metal using phenanthrolin with coated zeolite. The stages carried out in the study began with the preparation process of 250 mesh zeolite which was activated using 1 M HCl solution. Then the zeolite coating process was carried out by mixed it with 10 ml distirer for 1 hour, the residue was dried, and then it would be ready for the adsorption process. After that, it was followed by the characterization of the adsorbent with FTIR at a wavenumber of 3400-250cm-1 and repeated for the adsorbent that had adsorbed iron (III) ions. The final step is to carry out the adsorption of iron (III) ions, where the process is carried out with variations in pH 2,6,8 and variations in contact time, that were 5, 10, 15, 30, 45, 60 (minutes). The results showed that natural zeolite after the activation process with hydrochloric acid had increased crystallinity. The results of pH variations showed that for the natural zeolite the higher the pH, the higher the adsorbent's effectiveness, while for the activated zeolite, the higher the pH, the lower the adsorbent's effectiveness. the variation in contact time showed that the longer the contact time, the effectiveness of natural zeolites and activated zeolites will decrease. The results of the concentration variation showed that the greater the concentration, the lower the effectiveness of natural zeolites and activated zeolites. Adsorption of natural zeolite on Fe (III) metal ion follows the Freundlich isotherm pattern with an n value of 0.09. Activated zeolite adsorption on Fe (III) metal ions followed the Langmuir isotherm pattern with a maximum capacity (Qm) of 1.18 mg / g.