Abstract
Bamboo waste can be converted into materials of high economic value when processed into activated charcoal which is useful as an adsorbent. This study aims to make activated charcoal from bamboo waste with 20%(w/v) phosphoric acid as an activator. The activated charcoal produced was used as an adsorbent for rhemazol brilliant blue dye. Characterization of activated and inactivated charcoal was carried out by referring to the Indonesian National Standard-1995. Contact time and pH were studied for optimizing the adsorption. The results showed that the optimum contact time was 60 minutes, and the pH of the solution was 2. Isotherm adsorption of both charcoals tends to follow Langmuir isotherm, and the adsorption capacity obtained was 12.2399 and 9.5697 mg/g for activated and nonactivated charcoals respectively. Adsorption kinetic charcoals follow to pseudo-second order. Both charcoals are thought to contain functional groups of hydroxy, carbonyl, and aliphatic double bonds and have heterogeneous surfaces.
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