Adsorption of phenolic compounds from aqueous solutions using carbon nanoporous adsorbent coated with polymer

Anbia, Mansoor; Ghaffari, Ali

doi:10.1016/j.apsusc.2009.07.070

Cited by 82 publications

(44 citation statements)

References 20 publications

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“…The pH was adjusted to values ranging from 1 to 13 using 1 M HCl and 0.1 M NaOH solution. The conical flasks were agitated at 150 rpm using a mechanical shaker to reach equilibrium (Anbia and Ghaffari 2009). After filtration, the concentration of the remaining metal ions in aqueous phase was measured.…”

Section: Effect Of the Solution Phmentioning

confidence: 99%

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

Anbia

Haqshenas

2015

Int. J. Environ. Sci. Technol.

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Mesoporous carbon nitride functionalized with melamine-based dendrimer amine has been developed. It has been characterized using N 2 adsorption-desorption isotherm, thermogravimetric analysis, Fourier transform spectroscopy and small-angle X-ray scattering techniques. The pore diameter is centered at 4.74 nm with a relatively high BET surface area of 102.2 m 2 /g with a pore volume of 0.12 cm 3 /g. Thermogravimetric analysis curves show that the samples (mesoporous carbon nitride and mesoporous carbon nitride functionalized with melamine-based dendrimer amine) have high thermal stability compared to the earlier species. Batch adsorption experiments were conducted to study the effect of adsorbent dose, temperature, contact time and solution pH for the removal of Pb(II) from aqueous systems. The Pb(II) and Cu(II) removal by mesoporous carbon nitride functionalized with melaminebased dendrimer amine was found to be 196.34 and 199.75 mg/g, respectively. The sorption data are correlated better with the Langmuir adsorption isotherm than Freundlich isotherm. The kinetic analysis has revealed that the overall adsorption process is successfully fitted in the pseudo-second-order kinetic model.

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Section: Effect Of the Solution Phmentioning

confidence: 99%

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

Anbia

Haqshenas

2015

Int. J. Environ. Sci. Technol.

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“…Surfactant-templated mesoporous materials have some specific features such as high surface areas and high adsorption capacities including the uniformity and periodicity of tunable mesopores [9][10][11], which are widely applicable to adsorbents and catalytic supports [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Template-Based Synthesis of Nanoporous Hydroxyapatite

2012

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Hydroxyapatite (HAp) particles, a potential starting material for bone substitutes, with nanopores were synthesized in the presence of cetyltrimethylammonium bromide (CTAB) and P123 as cationic and nonionic surfactants as the structuring units. Effect of nonionic surfactant concentration on surface areas is also investigated. Based on N 2 adsorption-desorption isotherms investigation, surface area increased up to 50 m 2 /g by using P123 and 147 m 2 /g by using CTAB as porosity agent. Pore structure remained even after the removal of surfactant and calcinations at 400 • C.

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“…Among these sorbent materials, activated carbons are the most widely used and exhibit good adsorption capacities for many organic pollutants due to their porous structures and large surface areas (Aksu and Yener 2001;Anbia and Ghaffari 2009;Nath and Bhakhar 2010;Zhou et al 2014). However, the application of activated carbons can be limited by a range of factors, including high cost, poor adsorption selectivity, poor mechanical strength, and expensive and difficult regeneration (Ferro-Garcia et al 1996;Anbia and Ghaffari 2009;Anbia and Lashgari 2009;Ahmad et al 2011;Shah et al 2011). In contrast, zeolites have a number of potential advantages as sorbents, such as good mechanical strength, good thermal stability, and high sorption selectivity (Wang and Peng 2010;Misaelides 2011).…”

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Yang

Cheng

2016

Environ Sci Pollut Res

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Sorption of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP), and 2,4,6-trichlorophenol (2,4,6-TCP) on a range of dealuminated zeolites were investigated to understand the mechanism of their sorption on microporous minerals, while the influence of common metal cations, solution pH, and humic acid was also studied. Sorption of chlorophenols was found to increase with the hydrophobicity of the sorbates and that of the microporous minerals, indicating the important role of hydrophobic interactions, while sorption was also stronger in the micropores of narrower sizes because of greater enhancement of the dispersion interactions. The presence of metal cations could enhance chlorophenol sorption due to the additional electrostatic attraction between metal cations exchanged into the mineral micropores and the chlorophenolates, and this effect was apparent on the mineral sorbent with a high density of surface cations (2.62 sites/nm 2 ) in its micropores. Under circum-neutral or acidic conditions, neutral chlorophenol molecules adsorbed into the hydrophobic micropores through displacing the Bloosely bound^water molecules, while their sorption was negligible under moderately alkaline conditions due to electrostatic repulsion between the negatively charged zeolite framework and anionic chlorophenolates. The influence of humic acid on sorption of chlorophenols on dealuminated Y zeolites suggests that its molecules did not block the micropores but created a secondary sorption sites by forming a Bcoating layer^on the external surface of the zeolites. These mechanistic insights could help better understand the interactions of ionizable chlorophenols and metal cations in mineral micropores and guide the selection and design of reusable microporous mineral sorbents for sorptive removal of chlorophenols from aqueous stream.

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Adsorption of phenolic compounds from aqueous solutions using carbon nanoporous adsorbent coated with polymer

Cited by 82 publications

References 20 publications

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

Template-Based Synthesis of Nanoporous Hydroxyapatite

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

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