Oil spill remediation: Selectivity, sorption, and squeezing capacity of silicone composite foams filled with clinoptilolite

Calabrese, Luigi; Piperopoulos, Elpida; Stаnkov-Jovаnović, Vesnа; Mitić, Violeta; Milone, Candida; Proverbio, E.

doi:10.1002/app.52637

Cited by 8 publications

(4 citation statements)

References 58 publications

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“…Undeniably, in virgin naphtha and kerosene, while showing a lower absorption capacity than B‐0 (518% vs 768% for B‐45 and B‐0, respectively, in naphtha), a faster absorption rate ( t e 100 vs 200 s for B‐45 and B‐0, respectively, in naphtha) and the highest oil/water selectivity (Figure 6) are evidenced. This behavior is also found for the recent composite foams obtained by the addition of clinoptilolite filler, but in the latter case, the absorbent capacity in virgin naphtha is evidently lower (518.2% and 362.9%, for B‐40 and 40% filled clinoptilolite foam, respectively) 38 …”

Section: Resultssupporting

confidence: 74%

“…This behavior is also found for the recent composite foams obtained by the addition of clinoptilolite filler, but in the latter case, the absorbent capacity in virgin naphtha is evidently lower (518.2% and 362.9%, for B-40 and 40% filled clinoptilolite foam, respectively). 38 The very low water absorption of the B-40 foam allows to obtain highest selectivity indices in all oils.…”

Section: Sorption Performancesmentioning

confidence: 99%

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Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics

Piperopoulos

Calabrese

Stаnkov-Jovаnović

et al. 2022

J of Applied Polymer Sci

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The aim of this article is the synthesis and characterization of bentonite‐filled siloxane foams for oil spills recovery. Composite foams at varying filler content in the range 35–45 wt% were investigated. The sorption kinetics and capacity of composite foams in different oils (e.g., kerosene, virgin naphtha, pump oil) were assessed. As a reference, water absorption capacity was also evaluated. Among all, the composite foam filled with 40 wt% bentonite (B‐40 batch) shows the lowest affinity with water and good absorption capacity with oils (mainly light oils) reaching an absorption capacity at saturation equal to 10.3 and 518.2 wt% in water and virgin naphtha, respectively. Furthermore, isothermal absorption curves were analyzed using three kinetic models: pseudo‐first order, pseudo‐second order, and Elovich models. The equilibrium isotherm fitting results were optimal using the pseudo‐second order model, indicating that chemisorption phenomena play a key role in the speed of the absorption phase for these PDMS‐based composite foams. Finally, a correlation was addressed between morphology, foam microstructure, absorption capacity, and kinetics.

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Section: Resultssupporting

confidence: 74%

Section: Sorption Performancesmentioning

confidence: 99%

Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics

Piperopoulos

Calabrese

Stаnkov-Jovаnović

et al. 2022

J of Applied Polymer Sci

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“…The higher the SI values, the higher the selective absorption capacity of the foam in the absorbate compared to water. Consequently, during pollutant spills in water, the foam, which floats in the water, absorbs the pollutants and reduces the unwanted absorption of water [59]. The recyclability of PDMS foam is a significant factor and provides both practical and economic benefits.…”

Section: Absorption Of Btxmentioning

confidence: 99%

A Facile and Green Synthesis of Hydrophobic Polydimethylsiloxane Foam for Benzene, Toluene, and Xylene Removal

Alatawi,

Abdullah,

Jamil

et al. 2023

Separations

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Due to its excellent properties, polydimethylsiloxane (PDMS) foam has recently attracted significant academic and industrial attention. In this study, a facile and green method was developed for PDMS foam synthesis. The PDMS foam was prepared by using the gas foaming method with eco-friendly materials, namely NaHCO3 as a blowing agent and acetic acid as the catalyst. By changing the ratios of the reactants and the curing temperature, foams with varying properties were obtained. The water contact angle of the obtained PDMS foams ranged from 110° to 139°. We found that the PDMS foams can be compressed to a maximum strain of 95% and retain their original size, showing excellent mechanical properties. The synthesized PDMS foams were tested as an absorbent to remove benzene, toluene, and xylene (BTX) from the water. It exhibited good selectivity, outstanding reusability, and absorption capacity. Its capability to remove a large amount of organic solvent from the water surface suggests the great promise of PDMS foam in recovering spilled organic compounds from water, with excellent separation performance for continuous treatment.

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“…Oil sorption tests were performed, according to [ 39 ], at room temperature and under slow stirring in a 250 mL of kerosene, virgin naphtha and pump oil. Furthermore, as a reference, sorption tests in water were also performed for all of the composite foams.…”

Section: Experimental Partmentioning

confidence: 99%

Sorption Capacity of Polydimethylsiloxane Foams Filled with Thermal-Treated Bentonite—Polydimethylsiloxane Composite Foams for Oil Spill Remediation

et al. 2023

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The spillage of oil causes severe and long-lasting impacts on both the environment and human life. It is crucial to carefully reconsider the methods and techniques currently employed to recover spilled oil in order to prevent any possible secondary pollution and save time. Therefore, the techniques used to recover spilled oil should be readily available, highly responsive, cost-effective, environmentally safe, and, last but not least, they should have a high sorption capacity. The use of sorbents obtained from natural materials is considered a suitable approach for dealing with oil spills because of their exceptional physical characteristics that support sustainable environmental protection strategies. This article presents a novel sorbent material, which is a composite siloxane foam filled with bentonite clay, aimed at enhancing the hydrophobic and oleophilic behavior of the material. The thermal treatment of bentonite optimizes its sorption capacity by eliminating water, and increasing the surface area, and, consequently, its interaction with oils. In particular, the maximum sorption capacity is observed in kerosene and naphtha for the bentonite clay thermally treated at 600 °C, showing an uptake at saturation of 496.8% and 520.1%, respectively. Additionally, the reusability of the composite foam is evaluated by squeezing it after reaching its saturation point to determine its sorption capacity and reusability.

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Oil spill remediation: Selectivity, sorption, and squeezing capacity of silicone composite foams filled with clinoptilolite

Cited by 8 publications

References 58 publications

Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics

Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics

A Facile and Green Synthesis of Hydrophobic Polydimethylsiloxane Foam for Benzene, Toluene, and Xylene Removal

Sorption Capacity of Polydimethylsiloxane Foams Filled with Thermal-Treated Bentonite—Polydimethylsiloxane Composite Foams for Oil Spill Remediation

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