EFEK WAKTU RENDAM AKTIVASI KIMIA BERBANTUAN GELOMBANG MIKRO TERHADAP SIFAT FISIKA KARBON AKTIF DARI KULIT BUAH JENGKOL (PITHECELOBIUM JIRINGA)

Yurike Asra, Iwantono Iwantono, Saktioto Saktioto, Rakhmawati Farma, Awitdrus Awitdrus

Abstract


Activated carbon based on jengkol fruit shell at soaking times assisted pottasium hydroxide (KOH)
activation by microwave has successfully been made, the ratio of carbon mass to KOH of 2:1. The
chemical activation soaking time was varied at 24 hours, 36 hours, and 48 hours. The aims of this
research was to study the effect of soaking time on the physical properties of activated carbon of
jengkol shell that represented by micro structure, surface area, adsorption, and chain structure of
activared carbon. The micro structure pattens of samples were in semi-crystralline structure as the
presence of quite narrow 2 peaks at 2θ : 22,994o and 42,102o representing the crystal orientation of
(002) and (100). The highest of stack height (Lc) was produced from the sample with soaking times 24
hours which was 1,773 nm, with surface area of 124,50 m2/g. The adsorption of methylen blue was as
high as 99,569mg/g and chain stucture of activated carbon based on jengkol shell was obtained
function group of C-H, C-C, C=O, and C-O at wave number of 2943,43 cm-1, 2369,65 cm-1, 1612,56
cm-1 and 1160,23 cm-,1 respectively.


Keywords


Jengkol shell; potassium hydroxide; soak time; microwave irradiation; activated carbon

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