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.  

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. 

Effect of Preparation Conditions on Heavy Metal Adsorption Characteristics of Activated Carbon Prepared from Non-Fibrous Material of Pineapple Leaves

2019 ◽  
Vol 824 ◽  
pp. 114-120
Author(s):  
Chutima Khumnuan ◽  
Amornrat Moungon ◽  
Karine Mougin ◽  
Pornsawan Amornsakchai
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Pore Volume ◽  
Fibrous Material ◽  
Natural Fiber ◽  
Chemical Activation ◽  
Carbonization Temperature ◽  
Metal Adsorption ◽  
Heavy Metal Adsorption ◽  
Activation Temperature

Activated carbon can be prepared from any kind of hydrocarbon-based material, and that from agricultural wastes is attractive for many reasons. The use of natural fiber in various industries gives rise to some associated waste streams. In this work, activated carbon, produced from the non-fibrous material waste from pineapple leaf fiber production, was studied for its heavy metal adsorption behavior. The material was carbonized at different temperatures and chemical activation was carried out using phosphoric acid. Pore size and pore volume of the adsorbent were determined using the Brunauer–Emmett–Teller (BET) method, and surface morphology by scanning electron microscopy (SEM). Fourier Transform Infrared Spectrophotometry (FT-IR) was used to identify the functional groups in the material. It was found that the surface area, pore volume and morphology of the surface depended on the carbonization temperature. The best adsorbent was obtained using a carbonization temperature of 500 °C and an activation temperature of 600 °C. Adsorptions of several heavy metals were studied over the concentration range of 4 - 800 mg L−1 and pH 2-10. The optimum amount of the adsorbent was found to be 1.20 g per 100 ml of solution, removing up to 92.67% of lead ions. The adsorption behaviour was closer to the Freundlich isotherm than to the Langmuir isotherm. So this waste could be a useful bio-source for activated carbon production.

Recent advances in activated carbon modification techniques for enhanced heavy metal adsorption

2021 ◽  
Vol 43 ◽  
pp. 102221
Author(s):  
Mariana Mariana ◽  
Abdul Khalil H.P.S. ◽  
E.M. Mistar ◽  
Esam Bashir Yahya ◽  
Tata Alfatah ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Adsorption ◽  
Heavy Metal Adsorption ◽  
Recent Advances ◽  
Carbon Modification

scholarly journals Heavy Metal Adsorption Characteristics and Produced of Food Waste Activated Carbon

2015 ◽  
Vol 24 (12) ◽  
pp. 1601-1608
Author(s):  
Jun-Hee Lee ◽  
Seung-Chul Lee ◽  
Min Ju ◽  
Ji-Hye Kim ◽  
Don-Gil Lee
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Food Waste ◽  
Metal Adsorption ◽  
Heavy Metal Adsorption ◽  
Adsorption Characteristics

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 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.

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