ADSORPSI ZAT WARNA METHYLENE BLUE MENGGUNAKAN ADSORBEN KOMPOSIT Fe3O4-ARANG AKTIF KULIT LAI [Durio Kutejensis (Hassk.)Becc.]

Abstract

Methylene blue is a synthetic dye commonly used in industry. Methylene blue is not very toxic to humans, but can cause skin irritation, eye irritation, and systemic effects including blood changes. This research aims to utilize lai bark activated charcoal composited with Fe₃O₄ as an adsorbent to adsorb methylene blue dye. Fe₃O₄-lai skin activated charcoal composite adsorbent was synthesized using the co-precipitation method from FeSO₄.7H₂O and FeCl₃.6H₂O then combined with lai skin activated charcoal. The Fe₃O₄-activated charcoal composite for skin was characterized using FTIR. The results of composite characterization using FTIR show that there is a wave number of 596.00 cm^-1 which is the Fe-O group. The research results showed that the optimum conditions for the adsorption of methylene blue dye by the Fe₃O₄-activated charcoal composite adsorbent for lai skin were 60 minutes, pH 8, concentration 250 mg/L and following the Langmuir isotherm. The maximum adsorption capacity of Fe₃O₄-lai skin activated charcoal composite was 197.8792 mg/g.

Keywords: Adsorption, Methylene Blue Dye, Composite, Lai Leather