Browsing by Author "Salsabila, Mufidah"

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    ARANG BUAH JABON PUTIH (Anthocephalus cadamba Miq.) UNTUK PENJERAPAN ION TIMBAL(II)
    (Elfitra, 2022-12) Salsabila, Mufidah; Hanifah, T. Abu
    This study aims to analyze the adsorption ability of white jabon fruit (Anthocephalus cadamba Miq.) on lead ions and the regeneration ability of white jabon fruit carbon and determine the isotherm model and adsorption kinetics. White jabon fruit carbon is made by carbonization at 300˚C for 30 minutes. The carbon will reach equilibrium so it is regenerated with 1 M HCl to restore the adsorption ability of the carbon. The yield of carbon was 65.5262%. The surface area of the carbon is 90.4858 m2/g. Carbon characterization results based on SNI No. 06-3730-1995 obtained a water content of 2.23%; ash content 4.30%; adsorption capacity of iodine 1007.1256 mg/g and adsorption capacity of methylene blue 24.4077 mg/g. Optimum conditions were obtained at pH 6, contact time 40 minutes and adsorbate concentration of 40 mg/L with adsorption efficiency of 99.41% and adsorption capacity of 1.6300 mg/g. The percentage of regeneration reached 89.71%. The pH of pzc obtained in this study was at a pH of around 5 which indicates that charcoal is negatively charged at an optimum pH of 6.. The FTIR results showed the functional groups N-H, C-H aliphatic, C-H aromatic, C=O, C-O-C and O-Pb. The SEM-EDS results showed differences in the surface of the carbon before adsorption, after adsorption and after regeneration with the contents of the carbon elements C, N, O, Na, Cl, K and Pb. The BET results showed that the largest surface area was obtained by carbon before adsorption, namely 0.2885 m2/g. The adsorption isotherm model follows the Langmuir isotherm with the equation y = 0.0665x + 0.1582 and the determination value R2 = 0.9061 which indicates that the adsorption on the surface is homogeneous and has a single layer or monolayer. The adsorption kinetics follows a pseudo-second order with the equation y = 0.2321x – 0.0634 and R2 = 0.9998 which indicates chemisorption.