scholarly journals Interaction between Hydrocarbons C6 and Modified Activated Carbons: Correlation between Adsorption Isotherms and Immersion Enthalpies

ACS Omega ◽  
2019 ◽  
Vol 4 (22) ◽  
pp. 19595-19604 ◽  
Author(s):  
Diana Hernández-Monje ◽  
Liliana Giraldo ◽  
Juan Carlos Moreno-Piraján
Keyword(s):  
Adsorption Isotherms ◽  
Activated Carbons ◽  
Modified Activated Carbons

Experimental and theoretical studies of adsorption of ibuprofen on raw and two chemically modified activated carbons: new physicochemical interpretations

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12363-12373 ◽  
Author(s):  
Lotfi Sellaoui ◽  
Hanen Guedidi ◽  
SarraWjihi SarraWjihi ◽  
Laurence Reinert ◽  
Salah Knani ◽  
...  
Keyword(s):  
Adsorption Isotherms ◽  
Activated Carbons ◽  
Theoretical Studies ◽  
Chemically Modified ◽  
Modified Activated Carbons ◽  
Experimental And Theoretical Studies

Knowledge of the ibuprofen (IBP) adsorption isotherms is important to understand and to improve its depollution process.

scholarly journals Computer Analysis of the Porous Structure of Activated Carbons Derived from Various Biomass Materials by Chemical Activation

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4121
Author(s):  
Mirosław Kwiatkowski ◽  
Elżbieta Broniek
Keyword(s):  
Porous Structure ◽  
Adsorption Isotherms ◽  
Computer Analysis ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Adsorbed Layer ◽  
Dry Mass ◽  
Mass Ratio ◽  
Adsorption Volume ◽  
Homogeneous Surface

In this study, the preparation of activated carbons from various materials of biomass origin by activation with potassium hydroxide and a comprehensive computer analysis of their porous structure and adsorption properties based on benzene (C6H6) adsorption isotherms were carried out. In particular, the influence of the mass ratio of the activator’s dry mass to the char mass on the formation of the microporous structure of the obtained activated carbons was analysed. The summary of the analyses carried out based on benzene adsorption isotherms begged the conclusion that activated carbon with a maximum adsorption volume in the first adsorbed layer and homogeneous surface can be obtained from ebony wood at a mass ratio of the activator to the char of R = 3. The obtained results confirmed the superiority of the new numerical-clustering-based adsorption analysis (LBET) method over simple methods of porous structure analysis, such as the Brunauer–Emmett–Teller (BET) and Dubinin–Raduskevich (DR) methods. The LBET method is particularly useful in the evaluation of the influence of the methods and conditions of production of activated carbons on the formation of their porous structure. This method, together with an appropriate economic analysis, can help in the precise selection of methods and conditions for the process of obtaining activated carbons at specific manufacturing costs, and thus makes it possible to obtain materials that can successfully compete with those of other technologies used in industrial practice and everyday life.

Modified activated carbons for esterification of acetic acid with ethanol

2020 ◽  
Vol 101 ◽  
pp. 107608 ◽  
Author(s):  
Beata Krzyżyńska ◽  
Anna Malaika ◽  
Karolina Ptaszyńska ◽  
Agnieszka Tolińska ◽  
Piotr Kirszensztejn ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Activated Carbons ◽  
Modified Activated Carbons

scholarly journals Oxytetracycline Adsorption from Aqueous Solutions on Commercial and High-Temperature Modified Activated Carbons

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3481
Author(s):  
Joanna Lach ◽  
Agnieszka Ociepa-Kubicka ◽  
Maciej Mrowiec
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Activated Carbons ◽  
Electricity Consumption ◽  
Solution Ph ◽  
Carbon Modification ◽  
Modification Method ◽  
Flow Through ◽  
Proposed Modification ◽  
Modified Activated Carbons

The aim of the work was to evaluate the possibility of using commercial and modified activated carbons for the removal of oxytetracycline from aqueous solutions. The kinetics and statics of adsorption as well as the effect of the activated carbon dose and solution pH on the efficiency of the oxytetracycline adsorption were analyzed. Based on the study of oxytetracycline adsorption isotherms, the activated carbons were ranked in the following order: F-300 > WG-12 > Picabiol > ROW08 > WACC 8 × 30 > F-100 > WAZ 0.6–2.4. The most effective activated carbons were characterized by large specific surfaces. The best matching results were obtained for: Redlich–Peterson, Thot and Jovanovic models, and lower for the most frequently used Freundlich and Langmuir models. The adsorption proceeded better from solutions with pH = 6 than with pH = 3 and 10. Two ways of modifying activated carbon were also assessed. A proprietary method of activated carbon modification was proposed. It uses the heating of activated carbon as a result of current flow through its bed. Both carbons modified at 400 °C in the rotary kiln and on the proprietary SEOW (Joule-heat) modification stand enabled to obtain adsorbents with higher and comparable monolayer capacities. The advantage of the proposed modification method is low electricity consumption.

Adsorption of dissolved natural organic matter by modified activated carbons

2005 ◽  
Vol 39 (11) ◽  
pp. 2281-2290 ◽  
Author(s):  
Wei Cheng ◽  
Seyed A. Dastgheib ◽  
Tanju Karanfil
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Activated Carbons ◽  
Modified Activated Carbons
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