<![CDATA[Iron (Fe) is an essential metal whose presence in certain amounts is needed by living organisms, but in excess amounts it can cause toxic effects. This study aims to determine the effect of optimum contact time and optimum mass variation on Fe metal reduction using zeolite and manganese zeolite adsorbents. In addition, isotherm studies and adsorption kinetics were carried out. The variations in contact time used in this study were 0, 15, 30, 45, and 60 minutes. Meanwhile, the adsorbent mass variations used were 1 and 1.5 grams. From the results of this study it is known that the optimum time for the adsorption of Fe metal is 60 minutes with an adsorbent mass of 1.5 grams, a decrease in concentration of 51.1394% for manganese zeolite adsorbent and 47.6074% for zeolite adsorbent. . The iron ion adsorption process using zeolite and manganese zeolite follows the Freundlich adsorption equation model. The adsorption rates of zeolite on ferrous metals for masses of 1 gram and 1.5 grams tend to follow the second order pseudo kinetics model.]]>
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