Synthesis and application of modified commercial sponges for oil-water separation

Peng, Min; Zhu, Yuan; Li, Hui; He, Kai; Zeng, Guangming; Chen, Anwei; Huang, Zhenzhen; Huang, Tiantian; Yuan, Lei; Chen, Guiqiu

doi:10.1016/j.cej.2019.05.013

Cited by 212 publications

(84 citation statements)

References 118 publications

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“…Polyurethane-graphene sheet sponges could separate emulsions obtained with hexane, hexadecane, and soybean with an efficiency greater than 90% 58 . Additional examples of sponges can be found in a review on the subject 13 . Sponges previously develop and described above sorbed (rather than filtered) oil.…”

Section: Resultsmentioning

confidence: 99%

“…In addition to sorbents 11 , 12 , separation sponges have been developed to clean-up oil spills in surface waters. Separation sponges can be attached onto suction ports on boats, to selectively extract oil from surface waters 13 . Oil–water separation sponges are produced using different methods, including dip coating, chemical vapor deposition, in situ chemical reaction, wet chemical reaction, thermal treatment, polymerization, electroless deposition, or carbonization 13 .…”

Section: Introductionmentioning

confidence: 99%

“…Separation sponges can be attached onto suction ports on boats, to selectively extract oil from surface waters 13 . Oil–water separation sponges are produced using different methods, including dip coating, chemical vapor deposition, in situ chemical reaction, wet chemical reaction, thermal treatment, polymerization, electroless deposition, or carbonization 13 . Different materials have been used to produce sponges for oil–water separation.…”

Section: Introductionmentioning

confidence: 99%

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Selective solvent filters for non-aqueous phase liquid separation from water

Marshall

Estepa

Corradini

et al. 2020

Sci Rep

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Injectable filters permeable to water but impermeable to non-polar solvents were developed to contain non-aqueous phase liquids (NAPL) in contaminated aquifers, hence protecting downstream receptors during NAPL remediation. Filters were produced by injecting aqueous solutions of 0.01% chitosan, hydroxyethylcellulose and quaternized hydroxyethylcellulose into sand columns, followed by rinsing with water. Polymer sorption onto silica was verified using a quartz-crystal microbalance with dissipation monitoring. Fluorescence and gas chromatography mass spectroscopy showed low ppm range concentrations of non-polar solvents (e.g., hexane and toluene) in water eluted from the filters (in the absence of emulsifiers). The contact angles between polymer-coated surfaces and hexane or toluene were > 90°, indicating surface oleophobicity. Organic, polar solvents (e.g. tetrahydrofuran and tetrachloroethylene, TCE) were not separated from water. The contact angles between polymercoated surfaces and TCE was also > 90°. However, the contact area with polymer coated surfaces was greater for TCE than non-polar solvents, suggesting higher affinity between TCE and the surfaces. Emulsifiers can be used to facilitate NAPL extraction from aquifers. Emulsion separation efficiency depended on the emulsifier used. Emulsions were not separated with classical surfactants (e.g. Tween 20 and oleic acid) or alkaline zein solutions. Partial emulsion separation was achieved with humic acids and zein particles. Petroleum hydrocarbons (e.g. toluene) are common soil and groundwater contaminants because of their historical and current use in industry 1. Oil spills in surface waters can also occur during transport by boat, threatening surface water bodies and ecosystems in their proximity 2-4. In 1969, the oil well blowout in Santa Barbara, California released 4.1-4.6 million barrels of oil 5,6. Since then, American waters have been contaminated by more than 44 oil spills (each over 420,000 US gallons) 7. Spills have also occurred in Greece (where the Agia Zoni II released over 2,500 tonnes of oil in 2017 8), in India (where the Ennore spill released 160 tonnes of oil 9) and in east China (where the Sanchi oil tanker released 136,000 tonnes of natural-gas condensate in 2018 10). In addition to sorbents 11,12 , separation sponges have been developed to clean-up oil spills in surface waters. Separation sponges can be attached onto suction ports on boats, to selectively extract oil from surface waters 13. Oil-water separation sponges are produced using different methods, including dip coating, chemical vapor deposition, in situ chemical reaction, wet chemical reaction, thermal treatment, polymerization, electroless deposition, or carbonization 13. Different materials have been used to produce sponges for oil-water separation. For instance, graphene/polyurethane sponges have been obtained by in situ polymerization of N-methylpyrrolidone in the presence of graphene 14. These sponges have been used to selectively extract hexane, crude oil and engine oil flo...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Selective solvent filters for non-aqueous phase liquid separation from water

Marshall

Estepa

Corradini

et al. 2020

Sci Rep

View full text Add to dashboard Cite

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“…[1][2][3] A variety of conventional methods such as gravity or density separation, burning, skimming, centrifugation, coagulation, adsorption, etc., have been invented to separate oil-water. [4][5][6][7][8][9][10][11] However, these methods are not completely satisfactory. For instance, the coagulation and gravity separation techniques are low efficiency and multistage ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic paper with mussel-inspired polydimethylsiloxane–silica nanoparticle coatings for effective oil/water separation

Ruan

Xu²,

Chen

et al. 2020

RSC Adv.

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“…There are several common methods for surface modification of PU. Chemical deposition [33], wet chemical reaction [34,35], polymerization [36,37], electroless deposition [38], and carbonization [39] are some of the methods. Among these, wet chemical reactions have the advantages of mild conditions and simple operation.…”

mentioning

confidence: 99%

In-Situ Synthesis of Hydrophobic Polyurethane Ternary Composite Induced by Hydroxyethyl Cellulose through a Green Method for Efficient Oil Removal

et al. 2020

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Hydroxyethyl cellulose (HEC) was introduced to activate the surface of polyurethane (PU) sponge to successfully prepare a hydrophobic ternary composite PU/HEC/SiO2. The hydrophobic layer of the composite was realized by in-situ polymerization of methyltriethoxysilane (MTES) onto the surface of PU sponge. The formation of a stable hydrophobic SiO2 layer solved successfully the problem of ease of SiO2 particles shedding from the composite. Moreover, the amphiphilic molecules produced by the hydrolysis of MTES monomers facilitated the preparation of hydrophobic materials by aqueous dispersion polymerization. Aqueous synthesis made the reaction process environmentally-friendly and pollution-free. The as-prepared composite PU/HEC/SiO2 not only retains high porosity and low density of the PU sponge, but also considerably reduced the surface free energy and increased the surface roughness of the PU sponge. Therefore, outstanding hydrophobicity and high porosity endow the composite with excellent oil removal capability as a high-efficiency absorbent. Moreover, the hydrophobic composite that had absorbed oil could be regenerated easily by squeezing and recycling.

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Synthesis and application of modified commercial sponges for oil-water separation

Cited by 212 publications

References 118 publications

Selective solvent filters for non-aqueous phase liquid separation from water

Selective solvent filters for non-aqueous phase liquid separation from water

Superhydrophobic paper with mussel-inspired polydimethylsiloxane–silica nanoparticle coatings for effective oil/water separation

In-Situ Synthesis of Hydrophobic Polyurethane Ternary Composite Induced by Hydroxyethyl Cellulose through a Green Method for Efficient Oil Removal

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