Some radiochemical studies on the adsorption behaviour of molybdenum-99 on silver-coated carbon granules and activated carbon

1982 ◽  
Vol 68 (1-2) ◽  
pp. 7-13 ◽  
Author(s):  
S. El-Bayoumy ◽  
M. El-Kolaly
Keyword(s):  
Activated Carbon ◽  
Adsorption Behaviour ◽  
Coated Carbon

scholarly journals Adsorption behaviour and mechanism of the PFOS substitute OBS (sodium p -perfluorous nonenoxybenzene sulfonate) on activated carbon

2019 ◽  
Vol 6 (9) ◽  
pp. 191069 ◽  
Author(s):  
Wei Wang ◽  
Xin Mi ◽  
Huilan Shi ◽  
Xue Zhang ◽  
Ziming Zhou ◽  
...  
Keyword(s):  
Particle Size ◽  
Activated Carbon ◽  
Pore Size ◽  
Adsorption Capacity ◽  
Organic Pollutant ◽  
Chemical Properties ◽  
Hot Water ◽  
Adsorption Behaviour ◽  
Adsorption Capacities ◽  
Naoh Solution

Perfluorooctane sulfonate (PFOS) was listed as a persistent organic pollutant by the Stockholm Convention. As a typical alternative to PFOS, sodium p -perfluorous nonenoxybenzene sulfonate (OBS) has recently been detected in the aquatic environment which has caused great concern. For the first time, the adsorption behaviour and mechanism of OBS on activated carbon (AC) with different physical and chemical properties were investigated. Decreasing the particle size of AC can accelerate its adsorption for OBS, while AC with too small particle size was not conducive to its adsorption capacity due to the destruction of its pore structure during the mechanical crushing process. Intra-particle diffusion had a lesser effect on the adsorption rate of AC with smaller particle size, higher hydrophilicity and larger pore size. Reactivation of AC by KOH can greatly enlarge their pore size and surface area, greatly increasing their adsorption capacities. The adsorption capacity of two kinds of R-GAC exceeded 0.35 mmol g −1 , significantly higher than that of other ACs. However, increasing the hydrophilicity of AC would decrease their adsorption capacities. Further investigation indicated that a larger pore size and smaller particle size can greatly enhance the adsorptive removal of OBS on AC in systems with other coexisting PFASs and organic matter due to the reduction of the pore-blocking effect. The spent AC can be successfully regenerated by methanol, and it can be partly regenerated by hot water and NaOH solution. The percentage of regeneration for the spent AC was 70.4% with 90°C water temperature and up to 95% when 5% NaOH was added into the regeneration solution. These findings are very important for developing efficient adsorbents for the removal of these newly emerging PFASs from wastewater and understanding their interfacial behaviour.

scholarly journals Adsorption of acetaldehyde from air by activated carbon and carbon fibers

2021 ◽  
Vol 27 (2) ◽  
pp. 200549-0
Author(s):  
Soohyung Park ◽  
Muhammad Yaqub ◽  
Seunghan Lee ◽  
Wontae Lee
Keyword(s):  
Composite Material ◽  
Activated Carbon ◽  
Composite Materials ◽  
Carbon Fibers ◽  
Selective Absorption ◽  
Activated Carbon Fibers ◽  
Adsorption Efficiency ◽  
Dry Conditions ◽  
Dry And Wet Conditions ◽  
Coated Carbon

The adsorption of acetaldehyde from air using various activated carbon and carbon fibers was investigated in this study. These adsorbents included activated carbon (AC), carbon fibers (CFs), activated carbon fibers (ACFs), and metal-coated carbon fibers (MCCFs) supplied by different manufacturers. AC was categorized as AC1, AC2, AC3, and AC4, CFs were denoted as ACF1, while ACFs and MCCFs were expressed as ACF2 and ACF3, respectively. Five composite materials were prepared using the AC and ACFs in different ratios, and experiments were conducted to assess their acetaldehyde adsorption efficiency under dry and wet conditions. The results showed that the acetaldehyde adsorption efficiency of an impregnated AC4 was higher (95.9%) than that of both non-impregnated AC1 and AC3 and an impregnated AC2 after 1 min of operation. ACF2 showed a higher acetaldehyde adsorption efficiency (50.9%) as compared to ACF1 and ACF3 because of its larger surface area and selective absorption capability after 1 min of operation. A composite material comprising 6.3 g of AC4 and 1 g of ACF2 showed the highest adsorption efficiency of 97.9% under dry conditions. However, this adsorption efficiency significantly decreased under wet conditions.

Adsorption behaviour of Cr(VI) on activated carbon: isotherm, kinetic, and thermodynamic studies

2021 ◽  
Vol 217 ◽  
pp. 221-231
Author(s):  
Esra Altintig ◽  
Mehtap Karakas ◽  
Nilgun Basok ◽  
Hüseyin Altundag
Keyword(s):  
Activated Carbon ◽  
Adsorption Behaviour ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies

scholarly journals Adsorption Behaviour of Lactic Acid on Granular Activated Carbon and Anionic Resins: Thermodynamics, Isotherms and Kinetic Studies

Energies ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 665 ◽  
Author(s):  
Nirakar Pradhan ◽  
Eldon Rene ◽  
Piet Lens ◽  
Laura Dipasquale ◽  
Giuliana D’Ippolito ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Kinetic Studies ◽  
Adsorption Behaviour
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