Acid/Base-Treated Activated Carbons:  Characterization of Functional Groups and Metal Adsorptive Properties

Langmuir ◽  
2004 ◽  
Vol 20 (6) ◽  
pp. 2233-2242 ◽  
Author(s):  
J. Paul Chen ◽  
Wu
Keyword(s):  
Functional Groups ◽  
Activated Carbons ◽  
Acid Base ◽  
Adsorptive Properties

scholarly journals Effects of Gasifying Agents on the Characterization of Nut Shell-derived Activated Carbon

1995 ◽  
Vol 12 (3) ◽  
pp. 247-258 ◽  
Author(s):  
C. Nguyen ◽  
A. Ahmadpour ◽  
D.D. Do
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Benzene Adsorption ◽  
Surface Areas ◽  
Activating Agent ◽  
Micropore Size ◽  
Adsorptive Properties ◽  
Insight Into

Activated carbon was prepared from nut shells using a conventional two-stage method: carbonization followed by activation. Activation with steam or carbon dioxide as activating agent produced a range of chars of different burn-off. These were characterized for their total and micropore surface areas, and benzene adsorption capacity. Benzene adsorption measurement provided an insight into the effect of porosity development on the adsorptive properties of the adsorbent. It was found that activated carbon products from nut shells were comparable, in terms of adsorption characteristics, with activated carbons from other lignocellulosic precursors. The evolution of porosity of the resulting carbons shows that carbon dioxide is the preferable agent for the production of activated carbon with a narrow micropore size distribution.

scholarly journals Immersion Calorimetry for the Characterization of PD Catalysts Supported on Activated Carbon

2009 ◽  
Vol 6 (4) ◽  
pp. 1221-1227
Author(s):  
Liliana Giraldo ◽  
Juan Carlos Moreno-Piraján
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Functional Groups ◽  
Activated Carbons ◽  
The Other ◽  
Pd Catalysts ◽  
Immersion Calorimetry ◽  
Characterization Techniques ◽  
The Difference

Activated carbons obtained from coconut peel were oxidized using hydrogen peroxide. Superficial characteristics of these carbons were determined through N2and CO2isotherms and functional groups were characterized by TPD. Finally, the microcalorimetry technique was used in order to obtain the immersion enthalpies in diverse liquids and established the relation between them and the results obtained by the other characterization techniques. The results suggested that the immersion calorimetry allow establishing the difference between the supports and the catalysts.

scholarly journals Coffee residue-based activated carbons for phenol removal

2021 ◽  
Author(s):  
Hemavathy Palanisami ◽  
Mohamad Rafiuddin Mohd Azmi ◽  
Muhammad Abbas Ahmad Zaini ◽  
Zainul Akmar Zakaria ◽  
Muhd Nazrul Hisham Zainal Alam ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Functional Groups ◽  
High Performance ◽  
Activated Carbons ◽  
Phenol Removal ◽  
Surface Functional Groups ◽  
Maximum Capacity ◽  
Second Stage ◽  
Adsorptive Properties

Abstract This work was aimed to evaluate the adsorptive properties of activated carbons from coffee residue for phenol removal. The coffee residue was activated using H3PO4 and KOH, and the resultant activated carbons were characterized for surface area and functional groups. The values of surface area were recorded as 1,030 m2/g and 399 m2/g for H3PO4- and KOH-activated carbons, respectively. The maximum capacity for phenol removal is comparable for both activated carbons at 43 mg/g. The pores might be inaccessible due to electrostatic repulsion by surface functional groups and hydroxyl anions. The second stage in a two-stage adsorber design is necessary to accomplish the process with high performance and minimum dosage of activated carbon. Coffee residue is a promising activated carbon precursor for phenol removal.

Application of FT Spectroscopy in the Study of Fungi

2008 ◽  
Vol 59 (2) ◽  
pp. 212-215 ◽  
Author(s):  
Catalin Tanase ◽  
Aurel Pui
Keyword(s):  
Functional Groups ◽  
Toxic Substances ◽  
Ft Spectroscopy

The present study is devoted to the IR�FT characterization of some fungi species, to the identification of their main functional groups, as well as to emphasize the presence of some toxic substances in the structure of certain sporiferous plants.

Production and characterization of activated carbons from neem bark (Azadirachta indica)

2021 ◽  
Author(s):  
C. E. Ouedraogo ◽  
K. N. Aboua ◽  
D. B. Soro ◽  
M. Diarra ◽  
L. Meité ◽  
...  
Keyword(s):  
Azadirachta Indica ◽  
Activated Carbons

scholarly journals Chemical design and characterization of cellulosic derivatives containing high-nitrogen functional groups: Towards the next generation of energetic biopolymers

2021 ◽  
Author(s):  
Ahmed Fouzi Tarchoun ◽  
Djalal Trache ◽  
Thomas M. Klapötke ◽  
Amir Abdelaziz ◽  
Mehdi Derradji ◽  
...  
Keyword(s):  
Functional Groups ◽  
Next Generation ◽  
High Nitrogen ◽  
Chemical Design
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