Preparation and Characterization of Activated Carbon from Lapsi (Choerospondias axillaris) Seed Stone by Chemical Activation with Potassium Hydroxide

Abstract

Activated carbon (AC) was prepared from Lapsi seed stone by chemical activation with Potassium hydroxide at 400°C. The AC was characterized by pH, moisture content, Fourier transform-infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), methylene blue (MB) and iodine (I 2 ) number. FT-IR spectra indicated the presence of various oxygen containing functional groups on the surface of AC. SEM images show the highly porous characteristics of AC with full of cavities. The Iodine number of AC revealed that the AC was found to be highly micro-porous. The adsorption of methylene blue by prepared AC was analyzed by the Langmuir and Freundlich adsorption isotherms. The data fitted well to the Langmuir isotherm with monolayer adsorption capacity 158 mg/g. The analysis showed that the AC prepared from Lapsi seed stone activated with potassium hydroxide could be a low-cost adsorbent with favorable surface properties.

Review on Study of characteristics of low cost activated carbon

“…They were prepared activated carbon from wood waste by various chemical processes. The scanning electron microscopy were used for study of morphology and the surface functional group was investigated by Fourier transformation infrared spectroscopy techniques.Physico-Chemical characteristics such as bulk density, moisture content, ash content, matter soluble in water, matter soluble in acid, pH, iodine number, conductivity, porosity ,yield percentage and surface area was carried out to assess the suitability of the carbon as absorbent [1].Preparation and Characterization of Activated Carbon from Lapsi Seed Stone by Chemical Activation with Potassium Hydroxide was studied by Sahira Joshi and Bhadra Pokharel .Prepared activated carbon was characterized by pH, moisture content, Fourier transform-infrared spectroscopy, scanning electron microscopy methylene blue and iodine number [2].Activated Charcoal preparation, characterization and Applications was studied by Mohammad Khah and R. Ansari [3].Hassan et.al Synthesis and Characterization of Activated Carbon from Saudi Arabian Dates Tree's Fronds Wastes They were studied characteristics of activated carbons by using techniques like infrared spectroscopy transmission electron microscopy , scanning electron microscopy , X-ray diffraction, optical microscopy , apparent surface area estimation by nitrogen adsorption iodine number and ionexchange capacity [4]. Preparation of Activated Carbon from Green Coconut Shell and its Characterization.…”

“…Activated carbons having high specific porosity, high surface areas are extremely versatile adsorbents of major industrial significance. The adsorption capacity of activated carbon is linked to their large surface area, a high micro porosity and a high degree of surface reactivity [1,2] carbon can be synthesized by two methods, chemical and physical activation. In Chemical activation the starting materials is impregnated with a strong dehydrating agent and then followed by Pyrolysis at high temperature to prepare activated carbon.…”

ADSORPSI Β-Karoten YANG TERKANDUNG DALAM MINYAK KELAPA SAWIT (CRUDE PALM OIL) MENGGUNAKAN KARBON AKTIF

“…Karbon aktif dapat dibuat dari bahan bersumber karbon seperti tempurung kelapa, gambut, kayu, sabut, dan batubara [17]. Karbon aktif memiliki struktur amorf hidrofilik, dengan diameter pori ratarata 1 -4 nm, porositas partikel 40 -85 %, luas permukaan 300 -2000 m 2 /gr, kemampuan adsorpsi 0,3 -0,7 kg/kg kering [1,9]…”

“…R L (9) dimana K L adalah konstanta Langmuir dan C o adalah konsentrasi β-karoten yang terbesar (mg/l). Nilai R L menunjukkan karakteristik jenis isotherm, yakni baik (0 < R L < 1), kurang baik (R L > 1), liniar (R L = 1), dan ireversibel (R L = 0) [3].…”

Potential study of Indonesia coal for adsorbed natural gas

“…The higher Iodine number of the activated carbon has been attributed to the presence of large micropore structure might have resulted due to the reactivity of the activating agent KOH (Joshi and Pokharel, 2014). During carbonization and activation process, oxygen of the KOH could remove crosslinking and stabilizes the carbon atoms in crystallites.…”