Removal of benzene, toluene, ethylbenzene and xylene (BTEX) from aqueous solutions by montmorillonite modified with nonionic surfactant: Equilibrium, kinetic and thermodynamic study

Nourmoradi, Heshmatollah; Nikaeen, Mahnaz; Khiadani, Mehdi

doi:10.1016/j.cej.2012.03.029

Cited by 159 publications

(109 citation statements)

References 38 publications

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“…Results presented by Nourmoradi et al [81] and Vidal et al [57] show that it is possible to regenerate the used organo-mineral adsorbents by thermal treatment without significant loss of further sorption efficiency.…”

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 98%

“…Mineral and organo-mineral sorbents are proposed as the alternative to activated carbon or organic polymers. Most studies concern the sorption of BTEX as volatile petroleum derivatives representatives [80][81][82][83][84][85][86][87]. In these papers, different organic compounds have been used for mineral surface functionalization, and the influences of pH, adsorbent dosage and initial concentration on sorption efficiency have been considered, together with the equilibrium and kinetics of sorption.…”

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

“…The authors have explored sorption capacities (q e , mg/g) of the adsorbents using standard batch technique and applied popular isotherm and kinetic models for the evaluation of possible sorption mechanisms. The concentrations of organic compounds were determined using chromatography methods such as GC-FID (Gas Chromatography coupled to a Flame Ionization Detector) [49,81,87], GC-MS (Gas Chromatograph coupled to a Mass Spectrometer) [57], HPLC (High Performance Liquid Chromatography) [80]. Table 2 summarizes the results obtained for BTEX and other organic compounds sorption on natural and modified minerals including kinetic and isotherm parameters of the best fitting.…”

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

“…Nourmoradi et al [81] examined montmorillonite (Laviosa Co., Livorno, Italy) modified with poly ethylene glycol (PEG) in terms of benzene, toluene, ethylbenzene and xylenes sorption from aqueous solution (multi-component). Grain size of the sorbent did not exceed 125 µm.…”

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

“…The sorption selectivity in most studies followed the order xylenes > ethylbenzene > toluene > benzene [57,[80][81][82]. The dependency might be explained by molecular weight of the adsorbates, their hydrophobicity, water solubility, the size and geometrical shape of adsorbate particles, and the type of functional groups.…”

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

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Application of Mineral Sorbents for Removal of Petroleum Substances: A Review

et al. 2017

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Environmental pollution with petroleum products has become a major problem worldwide, and is a consequence of industrial growth. The development of sustainable methods for the removal of petroleum substances and their derivatives from aquatic and terrestrial environments and from air has therefore become extremely important today. Advanced technologies and materials dedicated to this purpose are relatively expensive; sorption methods involving mineral sorbents are therefore popular and are widely described in the scientific literature. Mineral materials are easily available, low-cost, universal adsorbents and have a number of properties that make them suitable for the removal of petroleum substances. This review describes recent works on the use of natural, synthetic and modified mineral adsorbents for the removal of petroleum substances and their derivatives from roads, water and air.

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Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 98%

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

Section: Sorption Of Benzene and Its Derivatives Present In Aqueous Smentioning

confidence: 99%

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Application of Mineral Sorbents for Removal of Petroleum Substances: A Review

et al. 2017

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Adsorption of toluene into commercial organoclay in liquid phase: Kinetics, equilibrium and thermodynamics

et al. 2015

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Organoclays are usually used as sorbents to reduce the spread of organic compounds and to remove them at contaminated sites. This study investigated the liquid-phase adsorption of toluene on organoclay (Spectrogel ® type C) of Brazilian company SpectroChem. In spite of not having a large amount of pores, this organoclay is a low-cost, effective adsorvent.Regarding the pH investigations, considerable effects of pH on the adsorption process were not observed. In the kinetics studies, it was observed that the process comes into equilibrium after 1 h with about 90 % of toluene removal. The experimental kinetic data were best fitted by mass transfer in external film model. For the equilibrium study, the best fit was by MSAM model at 288.15 K, Dubinin-Radushkevitch model at 298.15 K and Sips model at 308.15 K.Further, the thermodynamic parameters showed that the toluene adsorption on organoclay Spectrogel-C is an endothermic process. For tests of regeneration, ethanol was the eluent which proved more promising. This article is protected by copyright. All rights reserved

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Adsorption of benzene, toluene, and xylene (BTX) from binary aqueous solutions using commercial organoclay

2017

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Organoclays are promising alternative adsorbents for the removal of organic pollutants. The aromatic hydrocarbons benzene, toluene, and xylene (BTX) are typical petroleum contaminants found simultaneously in natural leaking. Therefore, investigations on multi‐component adsorption become essential to study this issue. Based on that, in the present study, a commercial organoclay from Brazil has been tested for its adsorption potential for binary aqueous mixtures of BTX. Kinetic and equilibrium batch adsorption experiments were performed to elucidate the differences in the affinities between the BTX contaminants and the organoclay. The kinetic study indicated that for benzene‐toluene, benzene‐xylene, and toluene‐xylene systems the contaminants preferentially adsorbed were toluene, p‐xylene, and p‐xylene (in the beginning of the assays), respectively. The affinity for the organoclay might be related to physicochemical properties of BTX. In the adsorption equilibrium studies, the obtained BTX isotherms were all linear, characterized by constant adsorption affinities. The observed differences between BTX adsorption capacities at equilibrium for mono and bi‐component systems confirmed the competition for adsorption sites of the organoclay.

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Removal of benzene, toluene, ethylbenzene and xylene (BTEX) from aqueous solutions by montmorillonite modified with nonionic surfactant: Equilibrium, kinetic and thermodynamic study

Cited by 159 publications

References 38 publications

Application of Mineral Sorbents for Removal of Petroleum Substances: A Review

Application of Mineral Sorbents for Removal of Petroleum Substances: A Review

Adsorption of toluene into commercial organoclay in liquid phase: Kinetics, equilibrium and thermodynamics

Adsorption of benzene, toluene, and xylene (BTX) from binary aqueous solutions using commercial organoclay

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