Evaluation of BTEX and phenol removal from aqueous solution by multi-solute adsorption onto smectite organoclay

Carvalho, Mário de Faria; Motta, M.; Benachour, Mohand; Sales, Deivson Cesar Silva; Abreu, César Augusto Moraes de

doi:10.1016/j.jhazmat.2012.07.057

Cited by 78 publications

(37 citation statements)

References 34 publications

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“…In addition, SC is generally higher for oils of higher density and viscosity [36,37,79]. This phenomenon can be explained by the fact that the substances with a higher molecular weight tend to be preferentially adsorbed over those of lower molecular weight [80]. Generally, long-chain hydrocarbons of relatively high molecular weight dominate the chemical composition of higher-density oils (such as spent engine oil).…”

Section: Sorption Of Land-based Oil Spillsmentioning

confidence: 99%

“…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%

“…Carvalho et al [80] used smectite (Paraiba, Brazil) functionalized with HDTMA for the sorption of benzene, toluene, ethylbenzene, p-xylene, m-xylene and phenol from single-component and multi-component solutions at 23 • C. The influence of pH (4, 7 and 9), contact time (time intervals in the range 0.5-240 min) and initial concentration of the solution (from 2 to 29 mg/L at optimal pH = 9 and contact time 240 min) on sorption efficiency was investigated. The most efficient sorption levels were noted at pH = 9.…”

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 Land-based Oil Spillsmentioning

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%

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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Surface grafting of styrene on polypropylene by argon plasma and its adsorption and regeneration of BTX

Luo

Chen

Juan

et al. 2018

J of Applied Polymer Sci

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Active macromolecular free radicals were generated on polypropylene (PP) fiber surfaces by argon plasma irradiation, and surface-modified PP fibers (PP-g-St fibers) were prepared by in situ grafting reaction of styrene monomers (St). The prepared samples were characterized by Fourier transform infrared, NMR, X-ray photoelectron spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Effects of reaction parameters on grafting percentage were studied, and adsorption capacities of PP-g-St fibers for benzene, toluene, and xylene (BTX) were evaluated. Regeneration adsorption efficiencies after adsorption of pure BTX and BTX emulsion and solution in water were explored. The results indicated that, using pure St as the monomer, the optimum input power, irradiation time, and grafting reaction time are 90 W, 3 min, and 3 h, respectively, and the grafting percentage of St reached 5.7% when pure St was used. The characterization results demonstrated that St was grafted onto the surface of the PP fibers. Compared to pristine PP fibers, the adsorption capacities of PP-g-St fibers toward toluene and xylene emulsions and solutions in water increased. In addition, regeneration adsorption efficiencies of modified fibers remained >90% after six cycles of regeneration adsorption experiments, which showed excellent regeneration ability.

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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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Evaluation of BTEX and phenol removal from aqueous solution by multi-solute adsorption onto smectite organoclay

Cited by 78 publications

References 34 publications

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

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

Surface grafting of styrene on polypropylene by argon plasma and its adsorption and regeneration of BTX

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

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