Tetracycline Adsorption onto Agave Americana Activated Carbon: Studies of Physicochemical Parameters and Porous Structure

2021 ◽  
Author(s):  
M. Atrous ◽  
Y. Ben Torkia ◽  
T. Selmi ◽  
M. Bouzid ◽  
M. Seffen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Physicochemical Parameters ◽  
Agave Americana

scholarly journals Computer Analysis of the Effect of Activation Temperature on the Microporous Structure Development of Activated Carbon Derived from Common Polypody

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2951
Author(s):  
Mirosław Kwiatkowski ◽  
Jarosław Serafin ◽  
Andy M. Booth ◽  
Beata Michalkiewicz
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Computer Analysis ◽  
Density Functional ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Geometrical Parameters ◽  
Activation Process ◽  
Microporous Structure ◽  
Activation Temperature

This paper presents the results of a computer analysis of the effect of activation process temperature on the development of the microporous structure of activated carbon derived from the leaves of common polypody (Polypodium vulgare) via chemical activation with phosphoric acid (H3PO4) at activation temperatures of 700, 800, and 900 °C. An unconventional approach to porous structure analysis, using the new numerical clustering-based adsorption analysis (LBET) method together with the implemented unique gas state equation, was used in this study. The LBET method is based on unique mathematical models that take into account, in addition to surface heterogeneity, the possibility of molecule clusters branching and the geometric and energy limitations of adsorbate cluster formation. It enabled us to determine a set of parameters comprehensively and reliably describing the porous structure of carbon material on the basis of the determined adsorption isotherm. Porous structure analyses using the LBET method were based on nitrogen (N2), carbon dioxide (CO2), and methane (CH4) adsorption isotherms determined for individual activated carbon. The analyses carried out showed the highest CO2 adsorption capacity for activated carbon obtained was at an activation temperature of 900 °C, a value only slightly higher than that obtained for activated carbon prepared at 700 °C, but the values of geometrical parameters determined for these activated carbons showed significant differences. The results of the analyses obtained with the LBET method were also compared with the results of iodine number analysis and the results obtained with the Brunauer–Emmett–Teller (BET), Dubinin–Radushkevich (DR), and quenched solid density functional theory (QSDFT) methods, demonstrating their complementarity.

Dye removal by activated carbon produced from Agave americana fibers: stochastic isotherm and fractal kinetic studies

2020 ◽  
Author(s):  
Taher Selmi ◽  
Ghizlane Enaime ◽  
Aïda Kesraoui ◽  
Abdelaziz Baçaoui ◽  
Mongi Seffen
Keyword(s):  
Activated Carbon ◽  
Dye Removal ◽  
Kinetic Studies ◽  
Agave Americana

Effect of water vapour on the porous structure of activated carbon produced from lignite

Fuel ◽  
1993 ◽  
Vol 72 (5) ◽  
pp. 712
Author(s):  
N. Petrov ◽  
K. Gergova ◽  
S. Eser
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Water Vapour ◽  
Effect Of Water

Transient, in situ synthesis of ultrafine ruthenium nanoparticles for a high-rate Li–CO2 battery

2019 ◽  
Vol 12 (3) ◽  
pp. 1100-1107 ◽  
Author(s):  
Yun Qiao ◽  
Shaomao Xu ◽  
Yang Liu ◽  
Jiaqi Dai ◽  
Hua Xie ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Carbon Nanofibers ◽  
In Situ Synthesis ◽  
High Rate ◽  
Ruthenium Nanoparticles ◽  
High Performing ◽  
Activated Carbon Nanofibers ◽  
Ru Nanoparticles

Ultrafine Ru nanoparticles anchored on freestanding activated carbon nanofibers with porous structure are synthesized as a high performing cathode for Li–CO2 batteries via a transient, in situ thermal shock method.

Porous structure and surface chemistry of phosphoric acid activated carbon from corncob

2012 ◽  
Vol 261 ◽  
pp. 75-82 ◽  
Author(s):  
N.V. Sych ◽  
S.I. Trofymenko ◽  
O.I. Poddubnaya ◽  
M.M. Tsyba ◽  
V.I. Sapsay ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Phosphoric Acid ◽  
Surface Chemistry ◽  
Porous Structure

STRUCTURE AND SORPTION PROPERTIES OF POROUS CARBON SORBENTS FROM ASPEN BARK

2019 ◽  
pp. 325-333
Author(s):  
Evgeniya Vladimirovna Veprikova ◽  
Ivan Petrovich Ivanov ◽  
Nikolay Vasil'yevich Chesnokov ◽  
Boris Nikolayevich Kuznetsov
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Vitamin B12 ◽  
Porous Structure ◽  
Sorption Capacity ◽  
Sorption Properties ◽  
High Rate ◽  
Effect Of Temperature ◽  
Carbon Sorbents ◽  
Structure And Sorption Properties

The effect of temperature of aspen bark pre-carbonization on evolution of a porous structure and sorption properties of the carbon sorbents prepared in results of thermo alkaline activation of carbonizats with hydroxide potassium was studied.  The relationship of a sorption of methylene blue and vitamin B12 by the sorbents from aspen bark to a volume and size of pores was established. It was shown, that the carbon sorbents capacity at а methylene blue are defined by pores with width 0.86–2.95 nm, and at a vitamin B12 – 3.18–6.89 nm. Comparation of the porous structures parameters and sorption properties of the carbon sorbents from aspen bark and commercial activated carbon for medical purposes was maked. Kinetic of markers sorption onto sorbents with different porous structure was studied and the corresponding rate constants were calculated. The possibility preparation of a carbon sorbent have high rate of vitamin B12 sorption (rate constant is 3.953 min–1) was shown.  The determinations of a sorption capacity of sorbents in conditions assume at enterosorbents test were carry out. It was determined, that sorbents, prepped from aspen bark, exceeds the sample of industrial activated carbon for medical purposes at sorption capacity of methylene blue and vitamin B12 in 1.7 and 1.5 time, correspondingly.

Influence of differences in porous structure within granules of activated carbon on adsorption of aromatics from aqueous solutions

Carbon ◽  
2004 ◽  
Vol 42 (2) ◽  
pp. 301-306 ◽  
Author(s):  
Anna Deryło-Marczewska ◽  
Jacek Goworek ◽  
Andrzej Świątkowski ◽  
Bronisław Buczek
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Porous Structure
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