CD Skripsi
Karbon Aktif Berbasis Limbah Pelepah Kelapa Sawit (Elaeis Guineensisjacq.) Sebagai Adsorben Fe (Iii) Dari Air Gambut
Oil palm fronds are oil palm plantation’s solid waste that is produced before and after harvest. The carbon compounds in palm fronds have potential as adsorbent-base activated carbon. Activated carbon synthesis needs a carbonization method and chemical activation using KOH. The first step, oil palm fronds are carbonized at various temperatures ( 400, 500 and 600 oC) for 60 minutes, producing COPF (Charcoal Oil Palm Fronds). Next, the chemical activation processed with charcoal : KOH ratio was 1:3 in 100 mL aqua DM. Then, the sample is calcinated at 800 oC for 30 minutes, after that the final step is neutralized with HCl and aqua DM until neutral pH (7). The result of the activation step is ACOPF ( Activation Carbon Oil Palm Fronds). The surface functional groups are characterized using FTIR and surface morphology using SEM. The adsorbent applied in the adsorption of Fe (III) on peat water with some contact time variation, adsorbent mass and peat water volume. The functional groups on COPF and ACOPF are detected by vibrations of C-O (carboxylic),O-H (free phenol and free hidroxy groups), O-H (alcohol, Phenol), C=O (Carbonyl), C=C (aromatic) and C-H. It shows the functional group of activated carbon with different vibration intensity. The surface morphology of ACOPF has relative small pore size, less carbonation residue and a lot of pores than COPF. The best Fe(III) adsorption in peat water is resulted at ACOPF 400 with 30 minutes contact time, 1 g of adsorbent mass and 100 mL of peat water volume. It is able to reduce Fe (III) with 100% efficiency. The adsorption capacity increases with increasing carbonization temperature and activation treatment. ACOPF 400 uses the Langmuir isotherm adsorption model with adsorption capacity 0,046 mg/g and linear regression of Langmuir isotherm is R2 = 0,998 . Activation with KOH increases ability to adsorpt Fe(III) in peat water, and in general ACOPF have better adsorption capacity than COPF.
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