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Mohammad Nader Lotfollahi - One of the best experts on this subject based on the ideXlab platform.
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Effects of Powder Activated Carbon Particle Size on Activated Carbon Monolith's Properties
Materials and Manufacturing Processes, 2015Co-Authors: Navid Saeidi, Mohammad Nader LotfollahiAbstract:Methyl cellulose as organic binder and bentonite as clay binder were simultaneously used to prepare Activated Carbon monolith (ACM) using powder Activated Carbon (PAC) and by means of extrusion process. To study the effects of PAC particle size on porosity, adsorption, and mechanical properties of the ACMs, four broad types of PAC including powder with particle size less than 150, 90, 50 µm, and powder without screening were prepared and used. Actually, it was tried to improve the adsorption capacity, surface area, and mechanical strength (both compression and impact strength) of the ACMs by screening the PAC microparticles to certain particle sizes. The results showed that arranging and decreasing the PAC particle size significantly improved the above-mentioned properties.
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A procedure to form powder Activated Carbon into Activated Carbon monolith
The International Journal of Advanced Manufacturing Technology, 2015Co-Authors: Navid Saeidi, Mohammad Nader LotfollahiAbstract:Activated Carbon monolith was prepared using powder-Activated Carbon, methyl cellulose as organic binder, and bentonite as clay binder. The used organic binder contrib- uted to the plasticity of powder-Activated Carbon for well ex- truding into well-shaped bodies, and the used clay binder con- tributed to the mechanical strength of the bodies. The bodies were characterized by determination of adsorption capacity, surface area, and mechanical strength (both compression and impactstrengths). After that, itwas endeavoredtoimprove the mentioned properties by sieving powder-Activated Carbon into a uniform distribution of particle size. The obtained results illustrated that making the particle size uniform led to improv- ing the bodies' properties significantly.
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Effects of Powder Activated Carbon Particle Size on Adsorption Capacity and Mechanical Properties of the Semi Activated Carbon Fiber
Fibers and Polymers, 2015Co-Authors: Navid Saeidi, Mohammad Nader LotfollahiAbstract:Effects of Activated Carbon particle size on adsorption and mechanical properties of the semi Activated Carbon fiber (SACF) were studied. Four types of powder Activated Carbons including powders with particle size less than 150, 90, 50 μm and powder without any screening were used to prepare the coater adsorbent mixture for coating on E-glass fiber. Iodine number and BET surface area of the coated fibers were measured. The results showed that arrangement and screening of the powder Activated Carbon had positive effect on the adsorption capacity and surface area of the produced samples. Also, arrangement and decrease of Activated Carbon particle size led to improve mechanical properties of the produced samples.
Navid Saeidi - One of the best experts on this subject based on the ideXlab platform.
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Effects of Powder Activated Carbon Particle Size on Activated Carbon Monolith's Properties
Materials and Manufacturing Processes, 2015Co-Authors: Navid Saeidi, Mohammad Nader LotfollahiAbstract:Methyl cellulose as organic binder and bentonite as clay binder were simultaneously used to prepare Activated Carbon monolith (ACM) using powder Activated Carbon (PAC) and by means of extrusion process. To study the effects of PAC particle size on porosity, adsorption, and mechanical properties of the ACMs, four broad types of PAC including powder with particle size less than 150, 90, 50 µm, and powder without screening were prepared and used. Actually, it was tried to improve the adsorption capacity, surface area, and mechanical strength (both compression and impact strength) of the ACMs by screening the PAC microparticles to certain particle sizes. The results showed that arranging and decreasing the PAC particle size significantly improved the above-mentioned properties.
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A procedure to form powder Activated Carbon into Activated Carbon monolith
The International Journal of Advanced Manufacturing Technology, 2015Co-Authors: Navid Saeidi, Mohammad Nader LotfollahiAbstract:Activated Carbon monolith was prepared using powder-Activated Carbon, methyl cellulose as organic binder, and bentonite as clay binder. The used organic binder contrib- uted to the plasticity of powder-Activated Carbon for well ex- truding into well-shaped bodies, and the used clay binder con- tributed to the mechanical strength of the bodies. The bodies were characterized by determination of adsorption capacity, surface area, and mechanical strength (both compression and impactstrengths). After that, itwas endeavoredtoimprove the mentioned properties by sieving powder-Activated Carbon into a uniform distribution of particle size. The obtained results illustrated that making the particle size uniform led to improv- ing the bodies' properties significantly.
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Effects of Powder Activated Carbon Particle Size on Adsorption Capacity and Mechanical Properties of the Semi Activated Carbon Fiber
Fibers and Polymers, 2015Co-Authors: Navid Saeidi, Mohammad Nader LotfollahiAbstract:Effects of Activated Carbon particle size on adsorption and mechanical properties of the semi Activated Carbon fiber (SACF) were studied. Four types of powder Activated Carbons including powders with particle size less than 150, 90, 50 μm and powder without any screening were used to prepare the coater adsorbent mixture for coating on E-glass fiber. Iodine number and BET surface area of the coated fibers were measured. The results showed that arrangement and screening of the powder Activated Carbon had positive effect on the adsorption capacity and surface area of the produced samples. Also, arrangement and decrease of Activated Carbon particle size led to improve mechanical properties of the produced samples.
Ines Giraldez - One of the best experts on this subject based on the ideXlab platform.
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gallic acid water ozonation using Activated Carbon
Applied Catalysis B-environmental, 2006Co-Authors: Fernando J Beltran, Juan F Garciaaraya, Ines GiraldezAbstract:The ozonation of gallic acid in water in the presence of Activated Carbon has been studied at pH 5. Hydrogen peroxide, ketomalonic and oxalic acids were identified as by-products. The process involves two main periods of reaction. The first period, up to complete disappearance of gallic acid, during which ozonation rates are slightly improved by the presence of Activated Carbon. The second one, during which Activated Carbon plays an important role as promoter, and total mineralization of the organic content of the water is achieved. The organic matter removal is due to the sum of contributions of ozone direct reactions and adsorption during the first period and to a free radical mechanism likely involving surface reactions of ozone and hydrogen peroxide on the Carbon surface during the second period. There is a third transition period where by-products concentration reach maximum values and ozonation is likely due to both direct and free radical mechanisms involving ozone and adsorption. Discussion on the mechanism and kinetics of the process is also presented both for single ozonation and Activated Carbon ozonation.
Fernando J Beltran - One of the best experts on this subject based on the ideXlab platform.
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gallic acid water ozonation using Activated Carbon
Applied Catalysis B-environmental, 2006Co-Authors: Fernando J Beltran, Juan F Garciaaraya, Ines GiraldezAbstract:The ozonation of gallic acid in water in the presence of Activated Carbon has been studied at pH 5. Hydrogen peroxide, ketomalonic and oxalic acids were identified as by-products. The process involves two main periods of reaction. The first period, up to complete disappearance of gallic acid, during which ozonation rates are slightly improved by the presence of Activated Carbon. The second one, during which Activated Carbon plays an important role as promoter, and total mineralization of the organic content of the water is achieved. The organic matter removal is due to the sum of contributions of ozone direct reactions and adsorption during the first period and to a free radical mechanism likely involving surface reactions of ozone and hydrogen peroxide on the Carbon surface during the second period. There is a third transition period where by-products concentration reach maximum values and ozonation is likely due to both direct and free radical mechanisms involving ozone and adsorption. Discussion on the mechanism and kinetics of the process is also presented both for single ozonation and Activated Carbon ozonation.
Bhekumusa J. Ximba - One of the best experts on this subject based on the ideXlab platform.
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Remediation of Tributyltin Contaminated Seawater by Adsorption Using nFe3O4, Activated Carbon and nFe3O4/Activated Carbon Composite Material
Water Air and Soil Pollution, 2013Co-Authors: Olushola S. Ayanda, Olalekan S. Fatoki, Folahan A. Adekola, Bhekumusa J. XimbaAbstract:The remediation of tributyltin (TBT) by adsorption onto nFe3O4, Activated Carbon and nFe3O4/Activated Carbon composite material as a function of adsorbent dose, contact time, pH, stirring speed, initial TBT concentration and temperature was studied. The effect of temperature on kinetics and equilibrium of TBT sorption on the precursors and the composite was thoroughly examined. The adsorption kinetics is well fitted using a pseudo-second-order kinetic model, and the adsorption isotherm data of nFe3O4, Activated Carbon could be described by the Freundlich isotherm model whereas nFe3O4/Activated Carbon composite could be described by the Freundlich and Dubinin–Radushkevich isotherm models. Thermodynamic parameters (i.e. change in the free energy (∆G°), the enthalpy (∆H°) and the entropy (∆S°)) were also evaluated. The overall adsorption process was endothermic and spontaneous in nature. The results obtained also showed that 99.9, 99.7 and 80.1 % TBT were removed from contaminated natural seawater by nFe3O4/Activated Carbon composite, Activated Carbon and nFe3O4, respectively.
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Preparation and characterization of Activated Carbon–nFe3O4, Activated Carbon–nSiO2 and Activated Carbon–nZnO hybrid materials
Particle & Particle Systems Characterization, 2012Co-Authors: Olalekan S. Fatoki, Olushola S. Ayanda, Folahan A. Adekola, Bhekumusa J. Ximba, Beatrice O OpeoluAbstract:The preparation and physicochemical characterization of Activated Carbon, nano metal oxides, and Activated Carbon – nFe3O4, Activated Carbon – nSiO2 and Activated Carbon – nZnO hybrid materials has been undertaken. The materials have been characterized by scanning and transmission electron microscopy, x-ray diffraction, CNH analysis and Fourier transform infrared spectroscopy. Surface area and porosity, ash content, pH, and point of zero charge were also measured. The results showed that the surfaces of Activated Carbon, nSiO2, Activated Carbon – nFe3O4, Activated Carbon – nSiO2 and Activated Carbon – nZnO are suitable for the sorption of cationic complexes while the surfaces of nFe3O4 and nZnO are favourable to the sorption of anionic complexes of heavy metals. Results also showed that the composition of the Activated Carbon and nano metal oxides increased the surface and micropore areas of nano metal oxides due to the large number of micropores and crevices on the surface of the hybrid materials.