Adsorption of BTX from aqueous solutions by Na-P1 zeolite obtained from fly ash

Bandura, Lidia; Kołodyńska, Dorota; Franus, Wojciech

doi:10.1016/j.psep.2017.03.036

Cited by 79 publications

(48 citation statements)

References 62 publications

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“…It can be observed that the correlation coefficient (r 2 ) for the pseudo-first order is 0.8747. Moreover, the calculated q e value (0.456 mg/g) does not agree with the experimental data (3.461 mg/g), showing that the adsorption of chromate on the functionalized zeolite is not a pseudo-first-order reaction [19]. The correlation coefficient (r 2 ) for the second-order kinetic model is 0.9998, which indicates that the adsorption system obeys the pseudo-second-order kinetic model.…”

Section: Adsorption Of Chromatementioning

confidence: 75%

“…In addition, the calculated q e value (3.459 mg/g) agrees very well with the experimental data. This suggests that adsorption of chromate ions on the amino functionalized zeolite samples is mainly chemisorption [19]. Figure 9 illustrates the isotherm for adsorption of chromate ions with different concentrations (5-120 mg/L) onto the 20% amino functionalized zeolite.…”

Section: Adsorption Of Chromatementioning

confidence: 97%

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Preparation of Amino Functionalized Hydrophobic Zeolite and Its Adsorption Properties for Chromate and Naphthalene

Wang

Leng

et al. 2018

Minerals

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Amino functionalized hydrophobic zeolite was prepared by modification of natural zeolite with 3-aminopropyltrimethoxysilane. X-ray diffraction, Fourier transform infrared analysis, thermal gravimetric analysis, Brunauer-Emmett-Teller surface areas, and element analysis were employed to investigate the structures of the samples. The water vapor adsorption method was used to determine the hydrophobicity of the samples. The adsorption properties of the samples for chromate and naphthalene were then investigated. The results showed that the silane modification had a negligible effect on the crystalline structure of zeolite while significantly decreasing the specific surface area and increasing the hydrophobicity of the zeolite sample. The functionalized zeolite samples exhibit higher adsorption capacity and removal rate on chromate and naphthalene as compared with the unmodified zeolite sample due to their specific amino functional group and hydrophobicity property.

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Section: Adsorption Of Chromatementioning

confidence: 75%

Section: Adsorption Of Chromatementioning

confidence: 97%

Preparation of Amino Functionalized Hydrophobic Zeolite and Its Adsorption Properties for Chromate and Naphthalene

Wang

Leng

et al. 2018

Minerals

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“…The amount of removed hydrocarbons, expressed as the sum of BTX, reached 0.34 g by 1 g of zeolite Na-P1. The higher the initial concentration of hydrocarbon, the higher the sorption efficiency (Bandura et al 2017b). …”

Section: Na-p1mentioning

confidence: 99%

The Removal of Organic Compounds by Natural and Synthetic Surface-Functionalized Zeolites: A Mini-Review

Muir¹,

Wołowiec

Bajda

et al. 2017

Mineralogia

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Abstract. The use of zeolites as sorbents has been investigated as a replacement for existing costly methods of removing organic contaminants from water solutions. Zeolites can be modified by inorganic salts, organic surfactants, metals or metal oxides in order to increase their adsorption capacity. The unique ion exchange and adsorption properties of zeolites make them very suitable for application in the removal of organic compounds such as volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), phenols and other complex petrochemicals. Many different studies have demonstrated their effectiveness in reducing the concentrations of organic contaminants as well as petroleum derivatives in water, which has been summarized in this paper.

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“…Monoaromatic hydrocarbons are present in the wastewaters of the petroleum industry in concentrations that require monitoring, due to their high toxicity and carcinogenic character, thus posing a risk to marine flora and fauna as well as humans if absorbed in large quantities . The group formed by the compounds benzene, toluene, ethylbenzene and xylene isomers, known as BTEX, has an average concentration in oily wastewater of about 40 mg L −1 , but this can reach near 1000 mg L −1 , depending on the production well . In recent years, improved treatment methods, such as the use of bioreactors, microfiltration membranes and processes involving adsorption, have attracted much research attention.…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] The group formed by the compounds benzene, toluene, ethylbenzene and xylene isomers, known as BTEX, has an average concentration in oily wastewater of about 40 mg L À1 , but this can reach near 1000 mg L À1 , depending on the production well. [3][4][5] In recent years, improved treatment methods, such as the use of bioreactors, [6] microfiltration membranes [7,8] and processes involving adsorption, [9,10] have attracted much research attention. The efficiency of adsorptive processes depends on a combination of factors, such as the nature of the adsorbent and the adsorbate, and operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Toluene Adsorption by Porous Resins: Batch and Continuous Flow Studies

Silva

Rocha

Lucas

2018

Macromolecular Symposia

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Water contaminated with monoaromatic hydrocarbons must be treated before being discharged due to the high toxicity of these compounds. Various treatment methods are currently used, among them processes that involve adsorption. Polymeric resins has been used to treat water and then it is a promising method to be applied for removing various compounds from oily water. In this work, two polymeric resins (divinylbenzene − DVB and methylmethacrylate‐divinylbenzene − MMA‐DVB), previously synthesized, were evaluated for removal of toluene from water. Batch tests were performed to study the adsorption equilibrium using the Langmuir and Freundlich models, while the adsorption kinetics were analyzed by the pseudo first‐order and pseudo second‐order models. Besides this, the saturation and regeneration were analyzed with continuous flow tests. The empirical model of Freundlich described the adsorption equilibrium data better than the theoretical model of Langmuir. Likewise, the pseudo first‐order model best represented the experimental data regarding the adsorption kinetics of the systems studied. In the batch tests, the resin DVB was most efficient in removing toluene, but it reached equilibrium with a longer contact time. The continuous flow tests showed that the two systems presented good removal performance; however, DVB column could treat ≈600 bed volumes of water while MMA‐DVB treated only ≈280. The absorbents revealed great potential to be regenerated.

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Adsorption of BTX from aqueous solutions by Na-P1 zeolite obtained from fly ash

Cited by 79 publications

References 62 publications

Preparation of Amino Functionalized Hydrophobic Zeolite and Its Adsorption Properties for Chromate and Naphthalene

Preparation of Amino Functionalized Hydrophobic Zeolite and Its Adsorption Properties for Chromate and Naphthalene

The Removal of Organic Compounds by Natural and Synthetic Surface-Functionalized Zeolites: A Mini-Review

Evaluation of Toluene Adsorption by Porous Resins: Batch and Continuous Flow Studies

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