Nano-based systems for oil spills control and cleanup

Ávila, Antônio F.; Munhoz, Viviane C.; Oliveira, Aline Silva de; Santos, Matheus; Lacerda, Glenda R.B.S.; Gonçalves, Camila P.

doi:10.1016/j.jhazmat.2014.02.038

Cited by 48 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…EG surrounded by a polystyrene superhydrophobic membrane (which is like a teabag) has been reported to be effective for the adsorption of oil [76]. The main application relates to oil spill cleanup.…”

Section: Exfoliated Graphite Compositesmentioning

confidence: 99%

A review of exfoliated graphite

2015

View full text Add to dashboard Cite

Exfoliated graphite (EG) refers to graphite that has a degree of separation of a substantial portion of the carbon layers in the graphite. Graphite nanoplatelet (GNP) is commonly prepared by mechanical agitation of EG. The EG exhibits clinginess, due to its cellular structure, but GNP does not. The clinginess allows the formation of EG compacts and flexible graphite sheet without a binder. The exfoliation typically involves intercalation, followed by heating. Upon heating, the intercalate vaporizes and/or decomposes into smaller molecules, thus causing expansion and cell formation. The sliding of the carbon layers relative to one another enables the cell wall to stretch. The exfoliation process is accompanied by intercalate desorption, so that only a small portion of the intercalate remains after exfoliation. The most widely used intercalate is sulfuric acid. The higher concentration of residue in unwashed EG causes the relative dielectric constant (50 Hz) of the EG to be 360 (higher than 120 for KOH-activated GNP), compared to the value of 38 for the water-washed case. An EG compact is obtained by the compression of EG at a pressure lower than that used for the fabrication of flexible graphite. Compared to flexible graphite, EG compacts are mechanically weak, but they exhibit viscous character, outof-plane electrical/thermal conductivity and liquid permeability. The viscous character (flexural loss tangent up to 35 for the solid part of the compact) stems from the sliding of the carbon layers relative to one another, with the ease of the sliding enhanced by the exfoliation process.

show abstract

Section: Exfoliated Graphite Compositesmentioning

confidence: 99%

A review of exfoliated graphite

2015

View full text Add to dashboard Cite

show abstract

“…The changes in CA could be possibly due to composition change of the membrane and the slight changing of the surface structure [45]. The nanofibers, which overlap with each other and are randomly distributed create locus for air pockets, which sustain the water droplets [46] leading to increased CA.…”

Section: Physico-chemical Characteristics Of the Fabricated Matsmentioning

confidence: 99%

Removal of oil from water using magnetic bicomponent composite nanofibers fabricated by electrospinning

Jiang

Tijing

Amarjargal

et al. 2015

Composites Part B: Engineering

139

View full text Add to dashboard Cite

a b s t r a c tIn the present study, a magnetic nanofibrous composite mat composed of polystyrene (PS)/polyvinylidene fluoride (PVDF) nanofibers with selective incorporation of iron oxide (Fe 3 O 4 ) nanoparticles (NPs) on/in PS was successfully prepared via a facile two-nozzle electrospinning process for oil-in-water separation. Field emission scanning electron microscopy and infrared spectroscopy showed the mats to be highly-porous in structure and confirmed the presence of the Fe 3 O 4 NPs on/in the nanofibers. Both PS and PVDF nanofibers exhibited oleophilic and hydrophobic properties. The results showed improved mechanical properties when PVDF was added to the composite mat compared to the pristine PS mat. In addition, the incorporation of magnetic Fe 3 O 4 NPs in the composite mat helps in the easy recovery of the mats after the oil-in-water sorption process. The composite mats showed good oil sorption capacity (35 e46 g/g) and improved mechanical property. The present electrospun magnetic PVDF/Fe 3 O 4 @PS nanofibers could be potentially useful for the efficient removal of oil in water and recovery of sorbent material.

show abstract

“…As the spilled oil undergoes several processes such as spreading, evaporation, dissolution, biodegradation and emulsification, developing effective methods for the quick removal of oil from the polluted environment is essential (Banerjee et al 2006;Annunciado et al 2005). Methods of oil spill removal can be classified into three main groups: oil separation and collection from water surface, mixing oil and water by dispersants and in situ burning (Avila et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Impregnation of polyurethane foam with activated carbon for enhancing oil removal from water

Keshavarz

Zilouei

Abdolmaleki

et al. 2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

To enhance the oil sorption capacity of polyurethane foam, different amounts of activated carbon (0.5, 1, 2 and 3 wt%) were grafted onto the surface of polyurethane foam. The modified polyurethane foam was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis and tensile elongation test. Grafting of activated carbon improved the polyurethane foam toughness and thermal resistance as revealed by tensile elongation and thermogravimetric tests, respectively. Experimental results showed the enhancement of oil sorption capacity and reduction in the water sorption in all cases. The optimal amount of activated carbon on the surface was 1 wt% which enhanced the oil sorption capacity up to 33.2 %. Reusability feature of the optimum sorbent was examined through four cycles of chemical regeneration, and about 85 % of the initial sorption capacity of the modified polyurethane foam was remained at the end. Equilibrium isotherms were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms using linear and nonlinear regression methods. The Marquardt's percent standard deviation and hybrid fractional error functions were minimized and normalized to investigate the effect of error criteria to determine the parameters of isotherms. The nonlinear method was found to be more accurate to determine the isotherm parameters, and the Langmuir isotherm was the best-fitting model.

show abstract

Nano-based systems for oil spills control and cleanup

Cited by 48 publications

References 22 publications

A review of exfoliated graphite

A review of exfoliated graphite

Removal of oil from water using magnetic bicomponent composite nanofibers fabricated by electrospinning

Impregnation of polyurethane foam with activated carbon for enhancing oil removal from water

Contact Info

Product

Resources

About