scholarly journals Removal of Methylene Blue by Adsorption onto Activated Carbons Produced from Agricultural Wastes by Microwave Induced KOH Activation

2019 ◽  
Vol 13 (3) ◽  
pp. 365-371 ◽  
Author(s):  
Ibtissem Kahoul ◽  
◽  
Nabil Bougdah ◽  
Faycal Djazi ◽  
Chahrazed Djilani ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbons ◽  
Agricultural Wastes ◽  
Koh Activation

scholarly journals CHARACTERIZATION AND CIPROFLOXACIN ADSORPTION PROPERTIES OF ACTIVATED CARBONS PREPARED FROM VARIOUS AGRICULTURAL WASTES BY KOH ACTIVATION

2020 ◽  
Vol 54 (7-8) ◽  
pp. 811-819
Author(s):  
TO-UYEN T. DAO ◽  
◽  
HONG-THAM T. NGUYEN ◽  
DUYEN THI CAM NGUYEN ◽  
HANH T.N. LE ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Adsorption Properties ◽  
Agricultural Wastes ◽  
Koh Activation

scholarly journals ADSORPTION OF METHYLENE BLUE ONTO ACTIVATED CARBON DEVELOPED FROM BAOBAB FRUIT SHELL BY CHEMICAL ACTIVATION: KINETIC EQUILIBRIUM STUDIES

2021 ◽  
Vol 22 (2) ◽  
pp. 31-49
Author(s):  
Radhia Nedjai ◽  
Ma’an Fahmi Rashid Alkhatib ◽  
Md Zahangir Alam ◽  
Nassereldeen Ahmed Kabbashi
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Material Surface ◽  
Maximum Adsorption Capacity ◽  
Koh Activation ◽  
Activation Process ◽  
Scanning Electron Micrographs ◽  
Freundlich Model

This article provides results of the usability of baobab fruit shell to produce activated carbons by chemical activation using ZnCl2, H3PO4, and KOH. This study indicated that activated carbon produced from baobab fruit shell fruit can be used as a promising adsorbent for the removal of methylene blue from aqueous solutions. Significant changes on the material surface following the activation process were observed through SEM and FTIR analyses. Scanning electron micrographs of BFS-ACs showed that porous structures were formed during activation, while the FTIR results indicated that the carbons have abundant functional groups on the surface. KOH activation led an activated carbon with a high methylene blue adsorption of 95.54% and maximum adsorption capacity of 113.63 mg/g, which is directly related to the specific surface area of activated carbons. The adsorption isotherm data were fitted to Langmuir and Freundlich adsorption models. The Langmuir isotherm model showed better fit to the equilibrium data than the Freundlich model. The adsorption process was well described by the pseudo-second-order kinetics. The BFS-ACs is an effective and low-cost adsorbent for the removal of MB from an aqueous solution. ABSTRAK: Kajian ini memberi input tentang kebolehgunaan kulit buah baobab bagi menghasilkan karbon teraktifan melalui aktiviti kimia menggunakan ZnCl2, H3PO4, dan KOH. Karbon aktif daripada kulit buah Baobab ini berpotensi sebagai penyerap bagi menyingkir larutan akueus metilin biru. Perubahan ketara pada permukaan bahan diikuti dengan proses pengaktifan dipantau melalui analisis SEM dan FTIR. Imbasan elektron mikrograf BFS-AC menunjukkan struktur porus terhasil semasa proses pengaktifan. Sementara dapatan FTIR menunjukkan karbon mempunyai banyak kumpulan berfungsi pada permukaan. Pengaktifan KOH menghasilkan karbon aktif menggunakan larutan biru metilin yang tinggi sebanyak 95.54% dan kapasiti maksimum penyerapan 113.63 mg/g, iaitu berkadar langsung dengan tumpuan kawasan permukaan karbon aktif berkaitan. Data isoterma penyerapan dibina pada model penyerapan Langmuir dan Freundlich. Model isoterma Langmuir lebih padan pada data keseimbangan berbanding model Freundlich. Proses penyerapan menunjukkan lebih kinetik order-kedua-pseudo. BFS-AC sangat efektif dan penyerap murah bagi membuang MB daripada larutan akues.

scholarly journals Optimisation of durian peel based activated carbon preparation conditions for dye removal

2013 ◽  
Vol 16 (1) ◽  
pp. 22-31
Author(s):  
Phung Thi Kim Le ◽  
Kien Anh Le
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Surface Area ◽  
Dye Removal ◽  
Activated Carbons ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Impregnation Ratio ◽  
Carbon Production ◽  
Removal Capacity

Agricultural wastes are considered to be a very important feedstock for activated carbon production as they are renewable sources and low cost materials. This study present the optimize conditions for preparation of durian peel activated carbon (DPAC) for removal of methylene blue (MB) from synthetic effluents. The effects of carbonization temperature (from 673K to 923K) and impregnation ratio (from 0.2 to 1.0) with potassium hydroxide KOH on the yield, surface area and the dye adsorbed capacity of the activated carbons were investigated. The dye removal capacity was evaluated with methylene blue. In comparison with the commercial grade carbons, the activated carbons from durian peel showed considerably higher surface area especially in the suitable temperate and impregnation ratio of activated carbon production. Methylene blue removal capacity appeared to be comparable to commercial products; it shows the potential of durian peel as a biomass source to produce adsorbents for waste water treatment and other application. Optimize condition for preparation of DPAC determined by using response surface methodology was at temperature 760 K and IR 1.0 which resulted the yield (51%), surface area (786 m2/g), and MB removal (172 mg/g).

scholarly journals Biological Safety Assessment of Functional Activated Carbons Prepared from Three Agricultural Wastes

2014 ◽  
Vol 59 (2) ◽  
pp. 321-331
Author(s):  
Han Chien Lin ◽  
Li-Ying Tseng ◽  
Ying-Jang Lai ◽  
She-Ching Wu ◽  
Noboru Fujimoto
Keyword(s):  
Safety Assessment ◽  
Activated Carbons ◽  
Agricultural Wastes ◽  
Biological Safety
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