Preparation of activated carbon from date stones by microwave induced chemical activation: Application for methylene blue adsorption

Activated carbons were prepared through chemical activation of waste particle board (WPB) precursor using potassium hydroxide as the chemical agent. The effects of different parameters, such as chemical/WPB ratio, activation time and activation temperature on yield and the methylene blue adsorption capacity of activated carbon were investigated. Experimental results indicated that the optimum conditions were as follow: activation temperature 850°C, KOH(50% concentration)/ WPB 4.0, activation time 50 min. Amount of methylene blue adsorption, Iodine number and the yield of activated carbon prepared under optimum conditions were 15.0 mL/0.lg, 1213mg/g and 36.9%, respectively. Therefore, great potential exists for developing activated carbon products from waste wood, which will have the positive effects of reducing our landfill problem and gain attractive products.

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Preparation of Activated Carbon from Sugarcane Bagasse Waste for the Adsorption Equilibrium and Kinetics of Basic Dye

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.751.671 ◽

2017 ◽

Vol 751 ◽

pp. 671-676 ◽

Cited By ~ 1

Author(s):

Tawan Chaiwon ◽

Panatda Jannoey ◽

Duangdao Channei

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Sugarcane Bagasse ◽

Chemical Activation ◽

Dye Adsorption ◽

Freundlich Isotherm ◽

High Specific Surface Area ◽

Methylene Blue Adsorption ◽

Cooperative Adsorption ◽

Bagasse Waste

This research aimed to study the preparation of activated carbon from sugarcane bagasse waste. The sugarcane bagasse adsorbent was prepared by calcination at 600°C for 2 hours with the use of sulfuric acid (H2SO4) as a chemical activation. The adsorption surface possessed high specific surface area (838 m2/g) with mesoporous diameter. Factors explaining adsorption including adsorption isotherm, adsorption kinetic and adsorption mechanism were constructed from methylene blue adsorption experiments. It was found that the equilibrium data was best represented by Freundlich isotherm, showing multilayer coverage of dye molecules at the outer surface of adsorbent with a cooperative adsorption (physisorption and chemisorption). The kinetic of methylene blue adsorption was found to follow pseudo-second-order rate kinetic model, with a good correlation coefficient. This indicated that the overall rate of the dye adsorption process was controlled by the chemisorption process.

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Physical Properties Analysis of Activated Carbon from Oil Palm Empty Fruit Bunch Fiber on Methylene Blue Adsorption

Journal of Technomaterials Physics ◽

10.32734/jotp.v1i1.824 ◽

2019 ◽

Vol 1 (1) ◽

pp. 67-73

Author(s):

Rakhmawati Farma

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Surface Morphology ◽

Physical Properties ◽

Oil Palm ◽

Chemical Activation ◽

Empty Fruit Bunch ◽

X Ray Diffraction ◽

Methylene Blue Adsorption ◽

X Ray

The present research was conducted to analyze the physical properties of activated carbon from oil palm empty fruit bunch fiber (OPEFBF) to be applied as methylene blue adsorbent material. The OPEFBF was pre-carbonized at 280oC for 4 hours in vacuum, milled, and sieved to obtain the self-adhesive carbon grain (SACG) with a size less than 106 µm. The chemical activation was done using potassium hydroxide (KOH) with variations of 25%, 50%, and 75% from the SACG weight, stirred at 400 rpm for 24 hours at room temperature and pyrolyzed using microwave irradiations at the output power of 720 W for 15 minutes. The physical properties of activated carbon consist of two characterizations, namely microstructure evaluated with X-ray diffraction (XRD) and surface morphology evaluated with scanning electron microscopy (SEM). The XRD pattern showed that the activated carbon had a semi-crystalline structure characterized by the presence of (002) and (100) planes at the diffraction angle of 2θ about 21o and 43o, respectively. The surface morphology of activated carbon depicted that a higher percentage of KOH resulted in more pores were formed. Thus, the higher the surface area of activated carbon, the greater the adsorption of methylene blue. The highest methylene blue adsorption was obtained in the sample of 75% KOH with 87.73 mg/g. The energy dispersive X-ray showed that the increase of KOH percentage used enhanced the percentage of carbon element produced.

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Analisis Variasi Temperatur Aktivasi Terhadap Daya Serap Arang Aktif Tandan Aren (Arenga Pinnata Merr) Dengan Agen Aktivasi Potassium Silicate(K2SiO3)

Jurnal Penelitian Pendidikan Fisika ◽

10.36709/jipfi.v5i3.13803 ◽

2020 ◽

Vol 5 (3) ◽

pp. 221

Author(s):

Muhammad Azam ◽

Muhammad Anas ◽

Erniwati Erniwati

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Adsorption Capacity ◽

Temperature Variation ◽

Chemical Activation ◽

Weight Ratio ◽

Potassium Silicate ◽

Physical Activation ◽

Activation Temperature ◽

Pyrolysis Reactor

This study aims to determine the effect of variation of activation temperature of activated carbon from sugar palm bunches of chemically activatied with the activation agent of potassium silicate (K2SiO3) on the adsorption capacity of iodine and methylene blue. Activated carbon from bunches of sugar palmacquired in four steps: preparationsteps, carbonizationstepsusing the pyrolysis reactor with temperature of 300 oC - 400 oC for 8 hours and chemical activation using of potassium silicate (K2SiO3) activator in weight ratio of 2: 1 and physical activation using the electric furnace for 30 minutes with temperature variation of600 oC, 650 oC, 700 oC, 750 oC and 800 oC. The iodine and methyleneblue adsorption testedby Titrimetric method and Spectrophotometry methodrespectively. The results of the adsorption of iodine and methylene blue activated carbon from sugar palm bunches increased from 240.55 mg/g and 63.14 mg/g at a temperature of 600 oC to achieve the highest adsorption capacity of 325.80 mg/g and 73.59 mg/g at temperature of 700 oC and decreased by 257.54 mg/g and 52.03 mg/g at a temperature of 800 oCrespectively.However, it does not meet to Indonesia standard (Standard Nasional Indonesia/SNI), which is 750 mg/g and 120 mg/g respectively.

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