STUDI KINETIKA ADSORPSI Cr(VI) OLEH KARBON AKTIF DARI TANDAN KOSONG KELAPA SAWIT; ADSORPTION KINETICS STUDY OF Cr(VI) ONTO ACTIVATED CARBON FROM PALM EMPTY FRUIT BUNCHE

Ruliatima, Iip Izul Falah

2013 | Disertasi | PROGRAM STUDI S2 ILMU KIMIA

Activated carbon from palm empty fruit bunches has been successfully synthesized through thermal (physical) activation at 800 oC for 15 minutes and washing by HCl processes. The research results showed that iodine adsorption capacity was 448.91 mg/g with a total water content of 1.17 %, volatile matter content 12.01 %, ash content 5.50 %, carbon content 81.32 % and the carboxylic, hydroxyl, carbonyl and S=O groups were present on the surface of adsorbent. The optimum pH for adsorption Cr(VI) by the activated carbon was at pH= 2. Application of reversible adsorption-desorption kinetics gave the value of k1; k-1 and K were 5.75 x 10-4 L.mg-1.minutes-1, 2.20 x 10-3 minutes-1 and 0.26; respectively, while 21.74 mg/g of adsorption capacity could be determined from Langmuir isotherm model.

Kata Kunci : Adsorpsi; Cr(VI); Karbon aktif; Kinetika