Fast and efficient mesoporous adsorbents for the separation of toxic compounds from aqueous media

Anbia, Mansoor; Mohammadi, Narmin; Mohammadi, Kaveh

doi:10.1016/j.jhazmat.2009.11.135

Cited by 47 publications

(22 citation statements)

References 70 publications

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“…In addition, the model assumes uniform surface adsorption energy and no transmigration of the adsorbate [37,65,67]. The Langmuir isotherm model is described by the expression:…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…In recent years, inorganic-organic hybrid materials have been attracted great interest because they have excellent properties [35]. Modified inorganic-organic mesoporous materials can be produced by either post-grafting or in direct routes involving the co-condensation of tetraalkoxysilanes and organo-functionalized trialkoxysilanes [36][37][38]. However, a limited number of studies have investigated the use of MCM-41 and/or modified inorganic-organic materials for removal of PAHs present in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

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Applications of inorganic–organic mesoporous materials constructed by self-assembly processes for removal of benzo[k]fluoranthene and benzo[b]fluoranthene

Costa

Garcia

Santos

et al. 2015

J Sol-Gel Sci Technol

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The mesoporous materials MCM-41 and the functionalized inorganic-organic material p-aminobenzoic acid-MCM-41 (PABA-MCM-41) were used as adsorbents to remove the PAHs benzo[k]fluoranthene and benzo[b]fluoranthene from aqueous media. Both MCM-41 and PABA-MCM-41 exhibited the hexagonal mesostructures typical of the M41S family, as confirmed by SAXS, with type IV isotherms and type H1 hysteresis. The materials showed uniform mesopore size distributions, high surface areas, and thermal stability. Adsorption tests showed that for both mesoporous materials, the quantity adsorbed (q e ) increased for higher initial PAH concentrations, and adsorption equilibrium was reached in around 90 min. The experimental kinetic data were fitted using the pseudosecond-order model, and the adsorption process could be described by the Langmuir isotherm. At higher temperatures, there were increases in the initial rates of adsorption and the kinetic constants for adsorption of the PAHs by PABA-MCM-41. The thermodynamic parameters indicated that the process was spontaneous, endothermic, and with a tendency toward disorder of the system at the adsorbent/adsorbate interface. The functionalization of MCM-41 increased the efficiency of adsorption of the PAHs by 44.5 and 32.0 % for benzo[k]fluoranthene and benzo[b]fluoranthene, respectively. Graphical Abstract Effect of contact time on adsorption of (a) B[k]F and (b) B[b]F by PABA-MCM-41. Conditions: 0.05 g of PABA-MCM-41, 5 mL of each PAH solution (concentration 200 lg L -1 ), temperature of 25°C, contact time of 300 min, and agitation at 150 rpm. 0 5 0 1 0 0 1 5 0 2 0 0 2 5 0 3 0 0 22.2 22.3 22.4 22.5 26.5 PAH (a) Benzo[k]fluoranthene (b) Benzo[b]fluoranthene Time (min) q e (µg g -1 )

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“…In addition, the model assumes uniform surface adsorption energy and no transmigration of the adsorbate [37,65,67]. The Langmuir isotherm model is described by the expression:…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Applications of inorganic–organic mesoporous materials constructed by self-assembly processes for removal of benzo[k]fluoranthene and benzo[b]fluoranthene

Costa

Garcia

Santos

et al. 2015

J Sol-Gel Sci Technol

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show abstract

“…They have a great potential for application in gas storage, catalysis, lubrication, drug delivery, biomolecule adsorption and fabrication of low dielectric devices. Generally, porous materials have found wide applications (Anbia and Hoseini 2012;Anbia et al 2010;Anbia and Moradi 2009). There are many reports on the synthesis of non-porous carbon nitride materials (Zimmerman et al 2001;Gillan 2000;Khabashesku et al 2000;Kouvetakis et al 1994).…”

Section: Introductionmentioning

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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“…Mesoporous materials, whose pore sizes range from 2 to 50 nm, are widely used in various fields such as adsorbents [13][14][15][16], heterogeneous catalysis [17][18][19], gas separation [20,21], energy storage [22], and drug delivery [23]. Mesoporous carbon, CMK-3, is a fascinating material and exhibits high surface area, ordered pore structure, high pore volume, narrow pore size distribution, and tunable pore diameters [24,25].…”

Section: Introductionmentioning

confidence: 99%

Adsorption process of methyl orange dye onto mesoporous carbon material–kinetic and thermodynamic studies

Mohammadi

Khani

Gupta

et al. 2011

Journal of Colloid and Interface Science

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202

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Fast and efficient mesoporous adsorbents for the separation of toxic compounds from aqueous media

Cited by 47 publications

References 70 publications

Applications of inorganic–organic mesoporous materials constructed by self-assembly processes for removal of benzo[k]fluoranthene and benzo[b]fluoranthene

Applications of inorganic–organic mesoporous materials constructed by self-assembly processes for removal of benzo[k]fluoranthene and benzo[b]fluoranthene

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

Adsorption process of methyl orange dye onto mesoporous carbon material–kinetic and thermodynamic studies

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