scholarly journals PENYERAPAN LOGAM BERAT Pb DAN Cu MENGGUNAKAN KARBON AKTIF BERBASIS MAHKOTA NANAS DENGAN VARIASI KONSENTRASI KALIUM HIDROKSIDA

2020 ◽  
Vol 17 (1) ◽  
pp. 30
Author(s):  
Meylia Susiana Dewi Putri ◽  
Awitdrus Awitdrus ◽  
Rita Kartini Manullang
Keyword(s):  
Activated Carbon ◽  
Microwave Irradiation ◽  
Physical Properties ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Carbon Chain ◽  
Chain Structure ◽  
Koh Activation ◽  
Adsorption Efficiency ◽  
Irradiation Power

This study aims to determine the influence of concentration of potassium hydroxide (KOH) on the adsorption of Pb2+ and Cu2+ metal ions in industrial used water. The activated carbon was prepared from pineapple crown waste. Pineapple crown was pre-carbonized at 180oC for 1 hours. Chemical activation was done using KOH with variations in concentrations of 2, 3, and 4 M. The samples were irradiated by using a microwave at 630 Watt of output power for 15 minutes. KOH activation and microwave irradiation power were influenced to the physical properties of the samples. Activated carbon obtained were characterized using SEM, EDX, FTIR and AAS. The results showed that highest adsorption were obtained from activated carbon that was activated by KOH 2 M. Adsorption efficiency for Pb2+ and Cu2+ metals were 81.15% and 49.71%, respectively. The carbon chain structure shows the functional groups C-H, C≡C, O-H, C=C at wavenumber 2889.49 cm-1, 2360.97 cm-1, 2339.97 cm-1.

scholarly journals KOH Activation with Microwave Irradiation and its Effect on the Physical Properties of Orange Peel Activated Carbon

2021 ◽  
Vol 2049 (1) ◽  
pp. 012025
Author(s):  
Awitdrus ◽  
Gladys May Grace Siregar ◽  
Agustino ◽  
Saktioto ◽  
Iwantono ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Microwave Irradiation ◽  
Physical Properties ◽  
Chemical Activation ◽  
Orange Peel ◽  
Interlayer Spacing ◽  
Koh Activation ◽  
Activation Process ◽  
Orange Peel Waste ◽  
Activating Agent

Abstract Chemical activation with assisted microwave irradiation was used to produced activated carbon from orange peel waste. The activating agent was potassium hydroxide (KOH) with concentrations of 2 M, 3 M, and 4 M. The microwave irradiation was done for 15 minutes with a 630 Watt output power. KOH concentration affected the physical properties of OP-ACxM. With increasing KOH concentration, the interlayer spacing (d002 and d100 ) grew, stack height (Lc ) increased, and stack width (La) dropped. The number of pores on the surface of OP-ACxM increased after the chemical activation process. In OP-ACxM, FTIR analysis reveals the presence of O-H, C-H, C-C, C=O, C=C, and C-O.

scholarly journals EFEK VARIASI DAYA IRADIASI GELOMBANG MIKRO TERHADAP KARBON AKTIF TONGKOL JAGUNG UNTUK PENJERNIHAN AIR

2018 ◽  
Vol 15 (1) ◽  
pp. 56
Author(s):  
Raysa Fadillah ◽  
Rakhmawati Farma ◽  
Awitdrus Awitdrus
Keyword(s):  
Activated Carbon ◽  
Surface Morphology ◽  
Microwave Irradiation ◽  
Potassium Hydroxide ◽  
Sea Water ◽  
Chemical Activation ◽  
Corn Cob ◽  
Irradiation Power ◽  
Activating Agent

The power of microwave irradiation affect the quality of activated carbon. In this research the activated carbon has been made of biomass of corn cob by using carbonization process, chemical activation using potassium hydroxide as the activating agent and microwave irradiation power was variated for 360 watt, 450 watt, 630 watt, dan 720 watt in 15 minutes. The surface morphology of activated carbon for the sample KA720 produced lots of pores more than that of the sample KA360, KA450, and KA630. The sea water that has been mixed with activaed carbon using microwave irradiation power of 720 watt with temperatur of 26oC, and pH of 7,41. 

scholarly journals PENGARUH AKTIVASI KIMIA DENGAN BANTUAN IRADIASI GELOMBANG MIKRO TERHADAP SIFAT FISIS KARBON AKTIF DARI SEKAM PADI SEBAGAI ADSORBEN

2018 ◽  
Vol 15 (1) ◽  
pp. 71
Author(s):  
Nurlisa Kartikasari ◽  
Rakhmawati Farma ◽  
Awitdrus Awitdrus
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Surface Morphology ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Metal Adsorption ◽  
Heavy Metal Adsorption ◽  
Irradiation Power ◽  
Atomic Adsorption Spectroscopy

The percentage of KOH affects the quality of activated carbon. In this research the activated carbon has been made of biomass from rice husk by using the process carbonization, chemical activation using Potassium Hydroxide variated percentage for 5%, 10%, 15% and 20% from the mass of sample and microwave irradiation power by 450 Watt. The surface morphology of activated carbon for the sample KA10 produced the even pores structure and lots of pores more than sample KA5, KA15 and KA20. The analysis results of surface morphology of activated also supported by analysis atomic adsorption spectroscopy (AAS) show that sample KA10 has the highest heavy metal adsorption 92,40% for Ni, 91,31% for Pb and 70,24% for Zn.  

Activated Carbon Based on Pineapple Crown for Heavy Metal Adsorption

2021 ◽  
Vol 1162 ◽  
pp. 57-64
Author(s):  
Awitdrus Awitdrus ◽  
Meylia Susiana Dewi Putri ◽  
Romi Fadli Syahputra ◽  
Iwantono Iwantono ◽  
Saktioto Saktioto
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Surface Area ◽  
Functional Groups ◽  
Chemical Activation ◽  
Liquid Waste ◽  
Interlayer Spacing ◽  
Carbon Chain ◽  
Chain Structure ◽  
Raw Material

The objectives of this study are to investigate the influence of concentration variation of potassium hydroxide (KOH) and to remove a heavy metal in liquid waste of the activated carbon. The raw material of activated carbon was obtained from pineapple crown waste. Pineapple crowns pre-carbonized at 180 oC for 1 hour. Chemical activation was carried out using KOH with concentration 2M, 3M, and 4M for 20 hours at 30 oC and temperature 60 oC for 2 hours. Microwave irradiation was conducted at 630 Watt of output power for 15 minutes. The physical properties of activated carbon were characterized using scanning electron microscopy to determine surface morphology of activated carbon, X-ray diffraction to calculated microstructure (i.e. interlayer spacing and microcrystalline dimension) using Bragg’s and Scherer’s equations, specific surface area was calculated from N2 adsorption-desorption isotherm using BET equation, Fourier-transform infrared (FTIR) identify the functional groups of activated carbon, and heavy metals absorption was tested using atomic adsorption spectrophotometric. The highest surface area of activated carbon is 300,901 m2/g for activated carbon with concentration 2M corresponding to the highest stack height (Lc) of activated carbon of 10,470 nm. The carbon chain structure shows the functional groups C-H, C≡C, O-H, C-OH, and CH2 at wavenumbers of 2889,49 cm-1, 2360,97 cm-1, 2339,97 cm-1, and 998,21 cm-1, respectively.

scholarly journals Chemical and Electrochemical Properties of Bamboo Activated Carbon Activate Using Potassium Hydroxide Assisted by Microwave-Ultrasonic Irradiation

2021 ◽  
Vol 21 (2) ◽  
pp. 211
Author(s):  
Norakmalah Mohd Zawawi ◽  
Fazlena Hamzah ◽  
Harumi Veny ◽  
Miradatul Najwa Mohd Rodhi ◽  
Mahanim Sarif
Keyword(s):  
Activated Carbon ◽  
Electrochemical Properties ◽  
Surface Area ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Total Pore Volume ◽  
Electrochemical Analysis ◽  
Supercapacitor Application ◽  
Power Intensity ◽  
Irradiation Power

This paper presents the utilization of bamboo residue from the chopstick industry as modified carbon (AC) for supercapacitor application.  Bamboo activated carbon (BAC) was activated using Potassium hydroxide (KOH) and assisted with microwave ultrasonic (Mw-U) irradiation to enhance the properties of bamboo activated carbon (BAC). Different microwave (Mw) power intensities of 100 W, 300 W, and 500 W at 30 minutes of retention time have been applied on activation and the carbonization process was conducted at temperature 800°C. The BAC was analyzed for the morphology using a scanning electron microscope and proximate and ultimate analysis. Then BAC with the higher surface area was subjected to the electrochemical analysis to determine the electrochemical properties. The study indicated Mw-U irradiation improved the morphology of the BAC, eliminated the impurity of the sample, and gave higher carbon content of BAC. The findings show that lower Mw-U irradiation power provided a higher surface area of BAC. The surface area of 646.87 m2/g and total pore volume of 2.8x10-1 cm3/g was obtained with a power intensity of Mw-U activation at 100 W. While, electrochemical properties, the specific capacitance (Cs) of BAC was 77 Fg-1 at 25 mVs-1 in 1 mol/L KOH of electrolyte for cyclic voltammetry (CV) which indicates the ability of the prepared BAC to be used as an electrode in supercapacitor application. This study determined that Mw-U irradiation can improve the properties of the bamboo during chemical activation and formed BAC that consists of supercapacitor properties.

scholarly journals Laboratory solid waste from practical activity as activated carbon precursor for reducing methylene blue in the laboratory wastewater

2021 ◽  
Vol 3 (2) ◽  
pp. 73-79
Author(s):  
Aninda Tifani Puari
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Solid Waste ◽  
Potassium Hydroxide ◽  
Agricultural Waste ◽  
Chemical Activation ◽  
Sem Analysis ◽  
Koh Activation ◽  
Ft Ir ◽  
Basic Biology

Activated carbon (AC) from agricultural waste has become one promising way to produce AC regarding to low price of the precursor and its effect to environment. In this research, the solid waste from the basic biology practical in UPT. Basic and Central Laboratory, Andalas University (Unand) was utilized as the precursor for producing low price AC. The activation was done by chemical activation using three different activating agents which were zink chloride (ZnCl2), phosphoric acid (H3PO4), potassium hydroxide (KOH). The carbonization process was done at temperature of 700°C. The precursor and three different AC after activation were characterized using fourier-transform infrared spectroscopy (FT-IR) to examine  the functional group and scanning electron microscope (SEM) to observe the pores structure. The adsorption efficiency (AE) of each AC on methylene blue (MB) contained in laboratory wastewater was examined through adsorption process with retention time of 30 minutes at room temperature and neutral pH. SEM analysis showed that the three activating agents were resulting in higher surface area and more pores were formed. The highest AE of MB from laboratory wastewater for each AC were 97,5 %, 96,31%, and 90,79 for KOH, , ZnCl2, and H3PO4, respectively. Meanwhile, the highest adsorption capacity was achieved by AC through KOH activation with 0,003 mg/g

Preparation of Activated Carbon from Durian Shell and Seed

2012 ◽  
Vol 626 ◽  
pp. 887-891 ◽  
Author(s):  
Mohd Fikri Mokhtar ◽  
Erny Haslina Abd Latib ◽  
Suriati Sufian ◽  
Ku Zilati Ku Shaari
Keyword(s):  
Activated Carbon ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Physical Characteristics ◽  
Carbonization Temperature ◽  
Nitrogen Flow ◽  
Carbonization Process ◽  
Duration Time ◽  
Activating Agent ◽  
Durian Seed

This study presents the preparation of activated carbon from durian shell (DShAC) and durian seed (DSeAC) based by chemical activation with potassium hydroxide (KOH) as an activating agent under the nitrogen flow. In order to find the optimum physical characteristics, variation in concentration of KOH, carbonization temperature and duration time was employed. The result shows that activated carbon from durian waste is a promising activated carbon as the highest yield was obtained from the carbonization process that occurs at 400C for four hours with the KOH concentration is 0.6 M.

Catalytic activation and application of micro-spherical carbon derived from hydrothermal carbonization of lignocellulosic biomass: statistical analysis using Box–Behnken design

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102680-102694 ◽  
Author(s):  
Z. Z. Chowdhury ◽  
S. B. Abd Hamid ◽  
Md. M. Rahman ◽  
R. F. Rafique
Keyword(s):  
Activated Carbon ◽  
Statistical Analysis ◽  
Potassium Hydroxide ◽  
Chemical Activation ◽  
Hydrothermal Carbonization ◽  
Corchorus Olitorius ◽  
Box Behnken Design ◽  
Catalytic Activation ◽  
Spherical Carbon ◽  
Physico Chemical

Activated carbon was produced by physico-chemical activation of hydrothermally carbonized dried stem derived from Corchorus olitorius, commonly known as Jute (JS), using potassium hydroxide (KOH) as an activation agent.

Effect of Activation Agents on COD Reduction Using Activated Carbon from Agricultural Residue

2020 ◽  
Vol 1010 ◽  
pp. 453-458
Author(s):  
Mohd Zazmiezi Mohd Alias ◽  
Rozidaini Mohd Ghazi ◽  
Nik Raihan Nik Yusoff ◽  
Mohd Hafiz Jamaludin
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Potassium Hydroxide ◽  
Activated Carbons ◽  
Oxygen Demand ◽  
Koh Activation ◽  
Ftir Analysis ◽  
Agricultural Residue ◽  
Cod Reduction ◽  
Activating Agent

This study investigated the effect of activating agent on activated carbon preparation and potential chemical oxygen demand (COD) reduction using activated carbons (AC) prepared. Zinc chloride, phosphoric acid and potassium hydroxide were utilized in impregnation of bamboo and rice husk. Result of SEM-EDX, FTIR as well as COD reduction were compared and discussed. The SEM displayed highest porosity in AC using KOH activation. FTIR analysis displayed obvious difference for each activation. AC using KOH activation obtained highest COD reduction.

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