a Model Isoterm Adsorpsi Langmuir Pada Analisis Daya Serap Iodium

Abstract

Iodine absorption analysis is used as an analysis in determining the quality of the adsorbent before its application. This analysis is able to identify the maximum amount of adsorbate that can be bound by an adsorbent. In addition, data analysis of iodine absorption can also explain the mechanism of the adsorption process that takes place in an adsorbate through the adsorption isotherm model. So that it can be used as an initial analysis in the manufacture of synthetic adsorption media. In this study, it was found that the absorption value of iodine in the adsorbent increased with lower iodine concentrations. The lowest iodine concentration of 0.025 N can be absorbed the most with a value of 81%. Iodine absorption analysis data obtained is then represented through the Langmuir isotherm model. Based on experimental data the correlation coefficient (R2) in the Langmuir isotherm model has a value of R2 = 0.945. So this model can be used to explain the adsorption mechanism in the analysis of iodine absorption. Through this adsorption model, it can be seen the adsorption mechanism that takes place and the maximum capacity of the adsorbate that is adsorbed. Based on the Langmuir isotherm model, analysis of iodine absorption through the monolayer absorption mechanism. The adsorption mechanism that occurs is the adsorption rate which is proportional to the fraction of empty sites present on the carbon along with the concentration of iodine in the solution. Iodine can be adsorbed to a maximum of 0.58 mg g-1. In other words, the Langmuir adsorption isotherm model can be used in the analysis of iodine uptake as a model that explains the maximum amount of bound adsorbate and the adsorption mechanism that takes place during the analysis.