scholarly journals Influence of surface functional groups and solution pH on removal of organic compounds and a heavy metal by activated carbon

TANSO ◽  
2006 ◽  
Vol 2006 (223) ◽  
pp. 215-219 ◽  
Author(s):  
Yuichi Kato ◽  
Motoi Machida ◽  
Qingrong Qian ◽  
Hideki Tatsumoto
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Functional Groups ◽  
Organic Compounds ◽  
Surface Functional Groups ◽  
Solution Ph

scholarly journals Effect of Salinity and PH on the Industrial Effluent Treatment by Activated Carbon: Modeling of the Kinetic Adsorption and Equilibrium Isotherms

2019 ◽  
Vol 8 (1) ◽  
pp. 77 ◽  
Author(s):  
E. F. Mohamed ◽  
G. Awad ◽  
C. Andriantsiferana ◽  
H. Delmas
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Organic Compounds ◽  
Inorganic Salt ◽  
Industrial Effluent ◽  
Effluent Treatment ◽  
Effect Of Temperature ◽  
Ambient Conditions ◽  
Solution Ph ◽  
Carbon Modeling

In recent years, interest has been focused on the removal of phenols from contaminated by using a variety of purification techniques. Adsorption of bio-industrial effluent on commercial activated carbon S23 was investigated at ambient conditions. In this wok, phenol and p-hydroxyl benzoic acid (PHBA) was studied as an example of the organic compounds present in the industrial effluent. The effect of temperature, pH, and the presence of inorganic salt NaCl on the pollutants adsorption were studied to give further comprehension of the optimal conditions of the organic compounds adsorption onto activated carbon. It was noted that the increase in temperature resulted in a decrease in phenols adsorption capacity by S23. Lower phenol adsorption was also observed at the solution pH 2 and 10, whereas, favourable adsorption was reached at neutral solution pH, and the coexisting inorganic salt NaCl exerts slightly positive effect on the adsorption process. The isotherms obtained at pH 2.2 and 3.5 (non-buffered solution) are very similar and showed a higher adsorption capacity compared with that obtained at pH 7 and 10 for PHBA which is more adsorbable than phenol. The kinetic of the adsorption processes can be better represented by the pseudo-second order. The results showed also that the total organic carbon (TOC) of the industrial effluent reduced for about 20 %. Freundlich, Langmuir and Jovanovic adsorption models were used for mathematical description of adsorption equilibrium of phenols. The results showed that the experimental data fitted very well to the Freundlich and Jovanovic models.

Oxidation of activated carbon by hydrogen peroxide. Study of surface functional groups by FT-i.r.

Fuel ◽  
1994 ◽  
Vol 73 (3) ◽  
pp. 387-395 ◽  
Author(s):  
V GOMEZSERRANO ◽  
M ACEDORAMOS ◽  
A LOPEZPEINADO ◽  
C VALENZUELACALAHORRO
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Functional Groups ◽  
Surface Functional Groups

Effects of the functional groups attached to aromatic organic compounds on their adsorption onto preloaded activated carbon

2012 ◽  
Vol 66 (8) ◽  
pp. 1799-1805 ◽  
Author(s):  
Lu Zhaoyang ◽  
Jiang Bicun ◽  
Li Aimin
Keyword(s):  
Hydrogen Bonding ◽  
Activated Carbon ◽  
Linear Relationship ◽  
Functional Groups ◽  
Organic Compounds ◽  
Hydrophobic Effect ◽  
Aromatic Stacking ◽  
Micropore Surface Area ◽  
Adsorption Capacities ◽  
The Relationship

The adsorption of phenol, p-nitrophenol, aniline, and nitrobenzene onto a commercial granular activated carbon (GAC: F400) preloaded with tannic acid (TA), a model background contaminant, was investigated. Compared with virgin GAC, the adsorption capacities of the four selected aromatic organic compounds (AOCs) onto GACs preloaded with TA at three densities were affected significantly. Also, the relationship between the adsorption capacities of AOCs and the characteristics of GACs was further discussed and clarified in this manuscript. The differences in the functional groups attached to the AOCs did not affect the similar linear relationship between the micropore surface area and their capacities to AOCs. However, the adsorption capacities of AOCs on TA-loaded GAC were affected by the different functional groups on the four AOCs: 67.6% of the capacity of aniline for virgin F400 remained on F400c (a preloaded GAC), compared with 23.8, 25.9, and 36.5% of phenol, p-nitrophenol, and nitrobenzene, respectively. The diversity of adsorption behavior of the four AOCs with different substituents was the result of hybrid contributions, such as hydrogen bonding, hydrophobic effect and aromatic stacking.

Adsorption of lead(II) and copper(II) on activated carbon by complexation with surface functional groups

2003 ◽  
Vol 480 (1) ◽  
pp. 171-180 ◽  
Author(s):  
Maria Pesavento ◽  
Antonella Profumo ◽  
Giancarla Alberti ◽  
Fabio Conti
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Surface Functional Groups

scholarly journals The importance of surface functional groups in the adsorption of copper onto walnut shell derived activated carbon

2017 ◽  
Vol 76 (11) ◽  
pp. 3022-3034 ◽  
Author(s):  
Ruzhen Xie ◽  
Yan Jin ◽  
Yao Chen ◽  
Wenju Jiang
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Photoelectron Spectroscopy ◽  
Chemical Activation ◽  
Critical Role ◽  
Walnut Shell ◽  
Infrared Spectrometry ◽  
Copper Uptake ◽  
Surface Functional Groups ◽  
Copper Adsorption

Abstract In this study, activated carbon (AC) was prepared from walnut shell using chemical activation. The surface chemistry of the prepared AC was modified by introducing or blocking certain functional groups, and the role of the different functional groups involved in the copper uptake was investigated. The structural and chemical heterogeneity of the produced carbons are characterized by Fourier transform infrared spectrometry, X-ray photoelectron spectroscopy, Boehm titration method and N2/77 K adsorption isotherm analysis. The equilibrium and the kinetics of copper adsorption onto AC were studied. The results demonstrated that the functional groups on AC played an important role in copper uptake. Among various surface functional groups, the oxygen-containing group was found to play a critical role in the copper uptake, and oxidation is the most effective way to improve Cu (II) adsorption onto AC. Ion-exchange was identified to be the dominant mechanism in the copper uptake by AC. Some other types of interactions, like complexation, were also proven to be involved in the adsorption process, while physical force was found to play a small role in the copper uptake. The regeneration of copper-loaded AC and the recovery of copper were also studied to evaluate the reusability of the oxidized AC.

Nitrogen-Doped Activated Carbon-Based Ammonia Sensors: Effect of Specific Surface Functional Groups on Carbon Electronic Properties

ACS Sensors ◽  
2016 ◽  
Vol 1 (5) ◽  
pp. 591-599 ◽  
Author(s):  
Nikolina A. Travlou ◽  
Christopher Ushay ◽  
Mykola Seredych ◽  
Enrique Rodríguez-Castellón ◽  
Teresa J. Bandosz
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Electronic Properties ◽  
Functional Groups ◽  
Surface Functional Groups ◽  
Nitrogen Doped ◽  
Ammonia Sensors ◽  
Carbon Based
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