Karakterisasi Isoterm Adsorpsi Fe dan Mn Pada Sampel Air Asam Tambang
Keywords:
Adsorpsi, Fe, Isoterm, MnAbstract
This study aimed to analyze the adsorption pattern of heavy metals. Adsorption tests were conducted on Fe and Mn in Acid Mine Drainage (AAT) samples containing Fe 13.006 mg/L and Mn 30.590 mg/L at various time and adsorbent mass variations. The experimental results showed that the composite mass of 5 grams could reduce the iron concentration to 99.35%, but the adsorbent mass of 2.5 grams is more efficient because it succeeded in reducing the iron concentration to 0.1484 mg/L within 30 minutes, thus meeting the quality standards set. The adsorption pattern in this study is described through the adsorption isotherm curve which has a correlation coefficient (R2) close to 1. Based on the analysis results, Fe adsorption followed the Langmuir isotherm pattern with R2 = 0.998, while Mn adsorption followed the Langmuir isotherm pattern with R2 = 0.997. The analysis showed that the correlation coefficient in Langmuir isotherm was higher than Freundlich isotherm for both Fe and Mn, indicating a very strong level of correlation in the Langmuir model. The adsorption mechanism observed in this study is characterized as chemical adsorption. The adsorbent exhibits an adsorption capacity of 1.286 mg/g for Fe and 1.031 mg/g for Mn under the optimal conditions of a 2.5-gram mass of adsorbent for 30 minutes.
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