Effects of surface functional groups of activated carbon on adsorption of triclosan from aqueous solution

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.

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Studies on pore structures and surface functional groups of pitch-based activated carbon fibers

Journal of Colloid and Interface Science ◽

10.1016/s0021-9797(02)00081-4 ◽

2003 ◽

Vol 260 (2) ◽

pp. 259-264 ◽

Cited By ~ 85

Author(s):

Soo-Jin Park ◽

Yu-Sin Jang ◽

Jae-Woon Shim ◽

Seung-Kon Ryu

Keyword(s):

Activated Carbon ◽

Functional Groups ◽

Carbon Fibers ◽

Activated Carbon Fibers ◽

Surface Functional Groups ◽

Pore Structures

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

ACS Sensors ◽

10.1021/acssensors.6b00093 ◽

2016 ◽

Vol 1 (5) ◽

pp. 591-599 ◽

Cited By ~ 29

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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An Investigation into the Adsorption Characteristics of Grafted Mesoporous Silicates for the Removal of Tetramethyl Ammonium Hydroxide from Aqueous Solution

Adsorption Science & Technology ◽

10.1260/026361702321104273 ◽

2002 ◽

Vol 20 (8) ◽

pp. 787-796 ◽

Cited By ~ 2

Author(s):

Brian P. Kelleher ◽

Aidan M. Doyle ◽

Benjamin K. Hodnett ◽

Thomas F. O'Dwyer

Keyword(s):

Aqueous Solution ◽

Functional Groups ◽

Pore Volume ◽

Adsorption Process ◽

Molecular Size ◽

Ammonium Hydroxide ◽

Surface Functional Groups ◽

Mesoporous Silicates ◽

Tetramethyl Ammonium ◽

Tetramethyl Ammonium Hydroxide

Four cubic mesoporous silicates (CMS), one unmodified and three grafted with amine, carboxylic and cyano surface functional groups, were prepared, characterised and compared as adsorbents for tetramethyl ammonium hydroxide (TMAH) from aqueous solution. The adsorption process was studied as a function of molecular size and CMS pore volume. Sorption on the unmodified, cyano- and carboxylic-grafted adsorbents closely followed the Langmuir model while adsorption on the amine-treated silicate conformed to the Freundlich model. A comparison of the adsorbent pore volume and the volume of sorbed TMAH molecules suggested that monolayer sorption occurred, there being some evidence that surface functional groups influenced the adsorption process. The presence or absence of structural order, as defined by X-ray diffraction analysis, had no significant influence on the adsorption, as all materials, both ordered and disordered, had relatively high adsorption capacities.

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Synergistic Effect of Nitric Acid Modified and Cu(II)-Loaded Activated Carbon on Catalytic Ozonation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1073-1076.708 ◽

2014 ◽

Vol 1073-1076 ◽

pp. 708-711

Author(s):

Jing Zhang ◽

Ya Wei Du ◽

Xiao Jing Liu ◽

Yu Wen Zhou ◽

Chun Liu ◽

...

Keyword(s):

Catalytic Activity ◽

Activated Carbon ◽

Nitric Acid ◽

Synergistic Effect ◽

Functional Groups ◽

Catalytic Ozonation ◽

Reusable Catalyst ◽

Surface Functional Groups ◽

Acid Modification ◽

Toc Removal

The surface properties and performance of activated carbon (AC) used for catalytic ozonation were investigated after nitric acid modification (N-AC) and Cu (II)-loaded (N-Cu-AC). The results showed that the nitric acid modification could increase the amount of surface functional groups of AC. As a result, the adsorption capacity and catalytic activity of AC could be improved. The surface functional groups and Cu (II)-loaded of N-Cu-AC showed a synergistic effect on catalytic ozonation, where the catalytic activity of Cu (II)-loaded was more stable. N-Cu-AC was an effective and reusable catalyst for catalytic ozonation. The highest TOC removal efficiency of 58.0% could be achieved when N-Cu-AC was used for 60 min-catalytic ozonation treatment of acid red 3R.

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