Karakterisasi Permukaan Arang Aktif Tempurung Biji Nyamplung

Abstract

AbstrakPembuatan arang aktif secara fisika-kimia dari tempurung nyamplung telah dilaksanakan dengan menggunakan 0%, 5% dan 10% H 3 PO 4 selama 60 dan 120 menit. Tujuan penelitian ini adalah untuk mengetahui karakteristik permukaan arang aktif tempurung biji nyamplung. Tempurung nyamplung diarangkan, kemudian direndam dalam larutan H 3 PO 4 pada konsentrasi 0%, 5%, dan 10% selama 24 jam. Selanjutnya diaktivasi dalam retort pada suhu 700 o C dan 800 o C selama 60 dan 120 menit. Karakteristik arang aktif tempurung nyamplung diuji menggunakan fourier transform infra red (FTIR), scaning electron microscope (SEM), and X-ray diffraction (XRD). Spektrum FTIR menunjukkan arang aktif yang dihasilkan memiliki pola serapan dengan jenis ikatan OH, C-H, C-O, dan C=C. Adanya ikatan OH dan C-O menunjukkan bahwa arang aktif yang dihasilkan cenderung bersifat lebih polar. Konsentrasi H 3 PO 4 berpengaruh terhadap tekstur pori yang terbentuk. Pada konsentrasi H 3 PO 4 rendah (5% atau 0%) akan dihasilkan lebih banyak pori yang berukuran kecil, <5 μ, sedangkan pada konsentrasi H 3 PO 4 10% dihasilkan pori yang lebih besar, >5 μ. AbstractCharacterization of Surface Active Shell Charcoal Nyamplung Seeds (Calophyllum inophyllum Linn). Chemical and physical activation of nyamplung shell with 0%, 5%, and 10% H 3 PO 4 for 60 and 120 minutes has been carried out to prepare activated charcoal. The purpose of this experiment was to look into the characteristic of nyamplung shell activated charcoal surface. Nyamplung shell was carbonized into charcoal, then activated by immersion in H 3 PO 4 solution using 0%, 5% and 10%, for 24 hours, and heated in retort at two temperatures (700 and 800 o C) and two duration (60 and 120 minutes). The material were characterized by fourier transform infra red (FTIR), scaning electron microscope (SEM) and X-ray diffraction (XRD). The FTIR spectrum show that activated charcoal has OH, C-H, C-O and C=C bonds. The bonds of OH and C-O indicated that the treatment was produced polar activated charcoal. The porous texture was influenced by H 3 PO 4 concentration. The porous with dimension <5 μ being predominant at low concentration of H 3 PO 4 (0% and 5%) but larger amount of H 3 PO 4 (10%) produced wide pore with dimension >5 μ.

Karakterisasi Dan Potensi Katalis Karbon Aktif Tersulfonasi Limbah Kayu Pada Reaksi Hidrolisis Sekam Padi Menggunakan Microwave

“…Perbedaan nilai kadar air dimungkinkan terjadi karena ada molekul air yang terjebak dalam pori karbon ketika proses aktivasi maupun pencucian. Nilai kadar air K dan KA-SO 3 H masih memenuhi persyaratan nilai kadar air menurut SNI yaitu maksimal 15%; semakin rendah kadar air yang terkandung diduga akan semakin mudah direaksikan dengan senyawa tertentu ketika akan dilakukan proses aktivasi, dan semakin tinggi nilai kadar air disinyalir dapat menyebabkan penurunan daya jerap karbon aktif terhadap senyawa gas maupun cairan (Wibowo, Syafii, & Pari, 2011).…”

Carbon Paste Electrode Hexadecyltrimethylammonium Bromide Modified Natural Zeolite for Chromium(vi) Detection

“…Non-adsorbed HDTMA-Br in the filtrate were determined by spectrophotometric method using Bromophenol Blue (BPB) solution [26]. An experiment to determine optimum chromate anion concentration exchanged method by SMZ based on previously reported method [26].…”

“…An experiment to determine optimum chromate anion concentration exchanged method by SMZ based on previously reported method [26].…”

“…Natural clinoptilolite has cavity dimension about 4.2-7 Å [32]. The diameter of carbohydrate chain of hexadecylammonium cation is 4 Å, the length is 23 Å, and the diameter of polar head -N + (CH 3 ) 3 is 6.94 Å which makes it too large to penetrate the largest channels in the clinoptilolite structure.…”

“…So it can be expected that in this concentration range, HDTMABr is starting to develop a double layer (admicelle). Nevertheless, it was decided not to raise the concentration of HDTMABr above 200 mM caused Wibowo [32] reported that CAC of Lampung clinoptilolite zeolite was 70 mM with adsorption capacity (Q) 0.1967 mmol/g.…”