Adsorption of benzoic acid onto high specific area activated carbon cloth

Ayrancı́, Erol; Hoda, Numan; Bayram, Edip

doi:10.1016/j.jcis.2004.10.033

Cited by 66 publications

(34 citation statements)

References 25 publications

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“…ESM-7b and 7c) is positively charged, which is favorable for the adsorption of NAs through the electrostatic attractive forces (Ayranci et al 2005). Besides, the high surface area and microporosity of these adsorbents suggest that the adsorption occurred through the micropore filling mechanism.…”

Section: Adsorption Mechanismmentioning

confidence: 99%

“…As a result, the surfaces of the PC and NAs are both negatively charged. Therefore, electrostatic repulsion forces may reduce the adsorption capacity of PC for NAs (Ayranci et al 2005;Faria et al 2008). On the other hand, the metal ions present in OSPW may neutralize the negative charge of NAs and thus decrease the repulsion between the NAs and PC (Pan and Xing 2008).…”

Section: Adsorption Mechanismmentioning

confidence: 99%

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Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Pourrezaei

Alpatová

Chelme-Ayala

et al. 2013

Int. J. Environ. Sci. Technol.

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Petroleum coke (PC) is a waste by-product generated during the oil upgrading processes by the petroleum industry. The continuing accumulation of large quantities of PC requires the development of innovative strategies for the effective utilization of this carbon-rich material. In this study, PC was used for the removal of naphthenic acids (NAs) and acid-extractable fraction (AEF) from oil sands process-affected water (OSPW), generated during the oil refining process. A systematic study on the adsorption of organic fractions, vanadium leaching from PC, adsorption mechanisms, and the effect of physico-chemical characteristics of the PC on adsorption process was performed. Physico-chemical properties of PC were determined by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy, and Brunauer-Emmett-Teller surface area analysis. AEF and NAs removals of 60 and 75 %, respectively, were achieved at PC dose of 200 g/L after 16 h of contact. FT-IR and TGA analysis of PC suggested the physisorption of organic compounds onto the surface of PC. The calculated mean free energy of adsorption (E \ 8 kJ/mol) also indicated the physisorption of organics to the PC surface. The hydrophobic interactions between the NAs and the PC were suggested as the dominant adsorption mechanisms. The vanadium release occurred when PC was mixed with OSPW and vanadium concentration increased with an increase in the PC dose. Speciation analysis indicated that the vanadium leached was predominantly vanadium (V) and insignificant amount of vanadium (IV) was also detected.

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Section: Adsorption Mechanismmentioning

confidence: 99%

Section: Adsorption Mechanismmentioning

confidence: 99%

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Pourrezaei

Alpatová

Chelme-Ayala

et al. 2013

Int. J. Environ. Sci. Technol.

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“…These studies comprised phenolic compounds [150,166], some aromatic organic acids [151,167], anilinic compounds [152], phthalic acid and its esters [153], and benzene and naphthalene sulfonates [154] (Table 2). With regard to phenolic compounds, the effect of ionization on the adsorption of phenol, hydroquinone, m-cresol, pcresol, and p-nitrophenol from acidic, basic, and natural pH aqueous solutions was examined [166].…”

Section: Isrn Chemical Engineeringmentioning

confidence: 99%

“…The effect of the solution pH in the range of 2-11 on the adsorption of benzoic acid from aqueous solutions onto Spectracarb 2225 ACC was also studied [167]. Both the adsorption rate and the extent of adsorption attained the highest values at pH 3.7 and decreased at higher or lower pH values.…”

Section: Isrn Chemical Engineeringmentioning

confidence: 99%

Development and Environmental Applications of Activated Carbon Cloths

Cukierman

2013

ISRN Chemical Engineering

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Activated carbon cloths have received growing attention because they offer comparative advantages over the traditional powdered or granular forms of this well-known adsorbent, providing further potential uses for technological innovations in several fields. The present article provides an overview of research studies and advances concerned with the development of activated carbon cloths and their use as adsorbent in environmental applications, mostly reported in the last years. The influence of some fabrics and textile wastes used as precursors, and of main activation process variables on the development and physicochemical, mechanical and/or electrical properties of the resulting activated carbon cloths are first reviewed. Then, investigations dealing with the removal of water and air pollutants by adsorption onto activated carbon cloths, including advances toward optimizing their regeneration after organic vapors saturation, are presented.

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“…Adsorption of aromatic compounds, particularly phenols, from solution has been studied extensively [20][21][22]. It was found that the uptake of phenol is a combined effect of physisorption and surface polymerization.…”

Section: Techniquesmentioning

confidence: 99%

Adsorption properties of activated carbon prepared from pre-carbonized petroleum coke in the removal of organic pollutants from aqueous solution

Ahmed¹,

El-Enin²,

El-Nabarawy³

2011

Carbon letters

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Activated carbon was prepared from pre-carbonized petroleum coke. Textural properties were determined from studies of the adsorption of nitrogen at 77 K and the surface chemistry was obtained using the Fourier-transform infrared spectrometer technique and the Boehm titration process. The adsorption of three aromatic compounds, namely phenol (P), p-nitrophenol (PNP) and benzoic acid (BA) onto APC in aqueous solution was studied in a batch system with respect to contact time, pH, initial concentration of solutes and temperature. Active carbon APC obtained was found to possess a high surface area and a predominantly microporous structure; it also had an acidic surface character. The experimental data fitted the pseudo-second-order kinetic model well; also, the intraparticle diffusion was the only controlling process in determining the adsorption of the three pollutants investigated. The adsorption data fit well with the Langmuir and Freundlich models. The uptake of the three pollutants was found to be strongly dependent on the pH value and the temperature of the solution. Most of the experiments were conducted at pH 7; the pH (PZC) of the active carbon under study was 5.0; the surface of the active carbon was negatively charged. The thermodynamic parameters evaluated for APC revealed that the adsorption of P was spontaneous and exothermic in nature, while PNP and BA showed no-spontaneity of the adsorption process and that process was endothermic in nature.

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Adsorption of benzoic acid onto high specific area activated carbon cloth

Cited by 66 publications

References 25 publications

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Impact of petroleum coke characteristics on the adsorption of the organic fractions from oil sands process-affected water

Development and Environmental Applications of Activated Carbon Cloths

Adsorption properties of activated carbon prepared from pre-carbonized petroleum coke in the removal of organic pollutants from aqueous solution

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