Removal of some polycyclic aromatic hydrocarbons from petrochemical wastewater using low-cost adsorbents of natural origin

Crisafully, Rudy; Milhome, Maria Aparecida Liberato; Cavalcante, Rivelino M.; Silveira, Edilberto R.; Keukeleire, Denis De; Nascimento, Ronaldo F.

doi:10.1016/j.biortech.2007.08.041

Cited by 233 publications

(128 citation statements)

References 20 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…In general, carbonaceous adsorbents are low cost materials, widely employed in remediation technology. However, their applicability can be limited by fouling that cause a pore blocking (i.e., to the presence of dissolved organic matter), to low adsorption capacity, sharp rise of bed temperature and difficulty of regeneration [14][15][16][17]. In recent years, organic contaminants removal by single-walled carbon nanotubes (SWCNTs) has attracted great interest due to their chemical, electronic and mechanical properties [18].…”

Section: Introductionmentioning

confidence: 99%

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

View full text Add to dashboard Cite

Abstract:In this work, the capability of two commercial high silica zeolites (HSZs), namely ZSM-5 and Y, for the removal of chlorobenzene (CB) from water was investigated by combining chromatographic and diffractometric techniques. The adsorption isotherms and kinetics of CB on ZSM-5 and Y zeolites were determined from batch tests. The adsorption kinetics were very fast; the time to reach equilibrium was less than 10 min. The equilibrium data of CB on the two HSZs showed dissimilarities that are particularly evident in the adsorption data concerning the low concentration range, where Y zeolite is characterized by low adsorption. On the contrary, at higher solution concentrations the adsorption capacity of Y is higher than that of ZSM-5. The crystalline structures of Y and ZSM-5 saturated with CB were investigated by X-ray diffraction (XRD) techniques. Rietveld refinement analyses of XRD data allowed for quantitative probing of the structural modifications of both zeolites after CB adsorption and provided insight into the preferred zeolite adsorption sites in both microporous materials. The refined framework-extraframework bond distances confirm that interactions between the selected organic contaminant and hydrophobic zeolites are mediated via co-adsorbed H 2 O. The occurrence of H 2 O-CB-framework oxygen oligomers explains variations in both the unit cell parameters and the shape of the channels, clearly confirming that water plays a very relevant role in controlling the diffusion and adsorption processes in hydrophobic zeolites.

show abstract

Section: Introductionmentioning

confidence: 99%

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

View full text Add to dashboard Cite

show abstract

“…15−17 Due to their chemical structure and physicochemical properties, 18−20 chitosan and related systems have been proposed as green adsorbents for treatment of wastewater polluted by heavy metals, 21 organic dyes, 22 and aromatic and linear hydrocarbons. 23 Some more recent works have shown that magnetic materials, consisting of Fe 0 (zerovalent iron, or ZVI) and/or iron oxide nanoparticles (typically magnetite and/ or maghemite), can be conjugated/encapsulated in a (bio)-polymeric matrix for wastewater remediation processes. 24−26 Such hybrid materials may combine the advantages of both components (i.e., the magnetic core and the polymeric shell), which allow highly efficient and selective pollutant removal and easy separation of the materials from the aqueous media after use by applying an external magnetic field.…”

Section: ■ Introductionmentioning

confidence: 99%

Chitosan-Derived Iron Oxide Systems for Magnetically Guided and Efficient Water Purification Processes from Polycyclic Aromatic Hydrocarbons

Nisticò¹,

Franzoso²,

Cesano³

et al. 2016

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Chitosan and pyrolyzed chitosan, acting as protective frameworks of magnetic nanoparticles (magnetite/ maghemite and/or metallic Fe), have been investigated to be used in magnetically guided water remediation processes from polycyclic aromatic hydrocarbons (PAHs). Chitosan-derived magnet-sensitive materials were first obtained by a one-step coprecipitation method, and then two carbon-derived magnetic chitosan materials were obtained under N 2 gas flow at 550 and 800°C, respectively. The obtained materials were investigated by means of X-ray diffraction (XRD), FTIR spectroscopy, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), magnetic force microscopy (MFM), and magnetization measurements. Thermal treatment conditions, along with the amounts of chitosan used in the synthesis processes, played a critical role in the crystal structure and magnetic properties of the obtained nanomaterials. The adsorption capacity of chitosan-derived magnet-sensitive materials was tested toward PAHs. The results indicate high sorption capacity for anthracene and naphthalene onto the chitosan-derived material pyrolyzed at 550°C. Furthermore, experiments performed with a mixture of eight PAHs show that PAH molecules with higher hydrophobicity and more extended aromaticity had stronger sorption capacity. Interestingly, due to the obtained results, the use of chitosan is encouraged as a platform for the creation of green adsorbents for further developments in wastewater purification treatments.

show abstract

“…Where, Co, Ct and are the initial concentration (mgL -1 ), the adsorbate concentration at time t (mgL -1 ) and the amount of adsorption at time t (mgg-1), respectively [29].…”

Section: The Adsorption Isothermsmentioning

confidence: 99%

Comparable Study of 4-chlorophenol Removal from Petrochemical Wastewater Using Mesoporous and Microporous Carbons: Equilibrium and Kinetics Investigations

S¹,

Madannejadb²

2016

J Pet Environ Biotechnol

View full text Add to dashboard Cite

In this study, an ordered mesoporous carbon structure with excellent adsorption properties towards chlorophenol compounds was synthesized using a hard template. The physico-chemical properties of the synthesized samples were studied using Small Angle X-ray Diffraction (SAXRD), Transmission electron microscopy (TEM), Scanning Electron Microscopy (SEM) and nitrogen adsorption-desorption analysis. The capability of adsorption of 4-chlorophenol on mesoporous carbon has been investigated by varying the reaction time, initial concentration of 4-chlorophenol, adsorbents loading and the pH of the solution; and the results compared with commercial activated carbon as a microporous carbon.Freundlich, Langmuir, Tempkin and dubinin-radushkevich adsorption isotherms were used to model the equilibrium adsorption data for 4-chlorophenol compound. The kinetic analysis showed that the adsorption process was fitted with the pseudo-second-order kinetic model. The equilibrium data were investigated by the main adsorption isotherm models on the mesoporous and microporous carbons as adsorbents, which revealed that the Freundlich model was better to describe the 4-chlorophenol adsorption than other models. Also, the obtained results indicated that the adsorption capacity and equilibrium time for mesoporous carbon were better than microporous carbon, 90 mg/g after 25 minute compare to 60 mg/g after 60 minute, respectively.

show abstract

Removal of some polycyclic aromatic hydrocarbons from petrochemical wastewater using low-cost adsorbents of natural origin

Cited by 233 publications

References 20 publications

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Chitosan-Derived Iron Oxide Systems for Magnetically Guided and Efficient Water Purification Processes from Polycyclic Aromatic Hydrocarbons

Comparable Study of 4-chlorophenol Removal from Petrochemical Wastewater Using Mesoporous and Microporous Carbons: Equilibrium and Kinetics Investigations

Contact Info

Product

Resources

About