Experimental Design Methodology for the Preparation of Activated Carbon from Sewage Sludge by Chemical Activation Process

2012 ◽  
Vol 38 (11) ◽  
pp. 2941-2951 ◽  
Author(s):  
Dania Sheha ◽  
Hasan Khalaf ◽  
Nader Daghestani
Keyword(s):  
Activated Carbon ◽  
Experimental Design ◽  
Sewage Sludge ◽  
Design Methodology ◽  
Chemical Activation ◽  
Activation Process ◽  
Experimental Design Methodology

scholarly journals Bio-Adsorbent Derived from Sewage Sludge Blended with Waste Coal for Nitrate and Methyl Red Removal: Synthesis, Oxidation, Performance and Environmental Consideration

2021 ◽  
Author(s):  
John Longo Masengo ◽  
Jean Mulopo
Keyword(s):  
Activated Carbon ◽  
Sewage Sludge ◽  
Surface Acidity ◽  
Chemical Activation ◽  
Activation Process ◽  
Order Kinetic ◽  
Methyl Red ◽  
Batch Mode ◽  
Ammonium Peroxydisulfate ◽  
Waste Coal

Abstract Low-cost bio-adsorbents were synthesized using two types of sewage sludge: D, which was obtained during the dissolved air flotation stage, and S, which was a mixture of primary and secondary sludge from the digestion and dewatering stages. The sewage sludge was mixed with waste coal before being activated with Potassium Hydroxide (KOH) and oxidized with ammonium persulfate (APS). The nitrate and methyl red removal capacities of the synthesized bio-adsorbents were evaluated and compared to those of industrial activated charcoal. The oxidation surface area of bio-adsorbents derived from sludge S shrank by six fold after modification, while those derived from D only varied narrowly from 312,72 m2/g to 282,22 m2/g, but surface modification had no effect on inorganic composition in either case. The adsorption of nitrate and methyl red (MR) was performed in batch mode, and the removal processes followed the pseudo second order kinetic model and the Langmuir isotherm fairly well. The adsorption capacities of nitrate and MR were higher at pH=2 and pH=4, respectively. The total nitrate Langmuir adsorption potential was DC-5-750 (26,735 mg/g) > commercial activated carbon (Com-AC) (20,61 mg/g) > DC-55-750M1 (17,06 mg/g), and for MR, Com-AC (196,07 mg/g) > DC-5-750M2 (175 mg/g).Statement of Novelty: This paper examines how the chemical structure of activated carbon derived from sewage sludge and blended with waste coal is altered during the chemical activation process to provide the optimal porous surface for nitrate and methyl red adsorptive remediation. The formation of carboxylic sites or the transformation of oxygen sites to carboxylic sites is the aim of the oxidation process of activated carbon in general. Ammonium peroxydisulfate was chosen because of its ability to oxidize the surface without significantly altering the porous structure and increase surface acidity by increasing carboxylic group presence. There are no studies that we are aware of that use ammonium peroxydisulfate to oxidize activated carbon from sewage sludge blended with waste coal

scholarly journals Application of an Experimental Design Methodology to Optimize the Synthesis Conditions of an Activated Carbon from Palm Kernel Shell

2021 ◽  
Vol 10 (6) ◽  
pp. 539-547
Author(s):  
Kouamé Gervais Konan Ladji Meite ◽  
Donafologo Baba Soro Kouassi Narcisse Aboua ◽  
Kouadio Dibi N’guettia Roland Kossonou ◽  
Sory Karim Traore Koné Mamadou
Keyword(s):  
Activated Carbon ◽  
Experimental Design ◽  
Design Methodology ◽  
Palm Kernel ◽  
Synthesis Conditions ◽  
Palm Kernel Shell ◽  
Experimental Design Methodology
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