Natural rubber/reduced-graphene oxide composite materials: Morphological and oil adsorption properties for treatment of oil spills

Songsaeng, Siripak; Thamyongkit, Patchanita; Poompradub, Sirilux

doi:10.1016/j.jare.2019.05.007

Cited by 82 publications

(19 citation statements)

References 59 publications

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“…Composites that have been used in oil sorption include polyurethane hybrid composite [ 26 ], nanoporous carbon-silica composite [ 27 ] and natural rubber/reduced-graphene oxide composite materials [ 28 ], with adsorption capacities of 12.2 g/g, 0.4 g/g and 21 g/g, respectively. These materials have better oil sorption ability than non-composite materials because they become strongly hydrophobic and more lipophilic, leading to better oil sorption.…”

Section: Introductionmentioning

confidence: 99%

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

et al. 2020

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The severity of oil pollution, brought about by improper management, increases daily with an increase in the exploration and usage of oil, especially with an increase in industrialization. Conventional oil treatment methods are either expensive or time consuming, hence the need for new technologies. The aim of this research is to synthesize polypyrrole-modified silica for the treatment of oily wastewater. Pyrrole was copolymerized with silica in the presence of ferric chloride hexahydrate by adding 23 mL of 117.4 g/dm3 ferric chloride hexahydrate drop wise to a silica-pyrrole mixture (1:2.3). The mixture was stirred for 24 h, filtered and dried at 60 °C for 24 h. The composite was then characterized using FTIR and SEM/EDX. A central composite model was developed in design expert software to describe the efficiency of oil removal using the polypyrrole-modified silica under the influence of initial oil concentration, adsorbent dosage and contact time. The synthesized adsorbent had FTIR bands at 3000–3500 cm−1 (due to the N-H), 1034 cm−1 (attributed to the Si-O of silica), 1607 cm−1 and 1615 cm−1 (due to the stretching vibration of C=C of pyrrole ring). The adsorption capacity values predicted by the central composite model were in good agreement with the actual experimental values, indicating that the model can be used to optimize the removal of oil from oily wastewater in the presence of polypyrrole-modified silica. The adsorbent showed excellent oil uptake when compared with similar materials. The optimum conditions for oil removal were 7091 mg/L oil concentration, 0.004 g adsorbent dosage and contact time of 16 h. Under these conditions, the percentage of oil adsorption was 99.3% and adsorption capacity was 8451 mg/g. As a result of the low optimum dosage and the lack of agitation, the material was found to be applicable in the remediation of field wastewater.

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Section: Introductionmentioning

confidence: 99%

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

et al. 2020

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“…The appropriate handling of exhausted biosorbents is a limiting process influencing the economical efficiency and sustainability of biosorption technology. However, biosorbent reusability could effectively reduce the cost of industrial application and minimize the total amount of waste generation after the adsorption process [ 42 ]. Considering the results from preliminary desorption experiments (not shown), a magnetically separated biosorbent was regenerated using 0.1 M HCl (Co-loaded) and 0.1 M CH 3 COOH (TT-loaded) as efficient desorbents and then used in four successive adsorption–desorption cycles.…”

Section: Resultsmentioning

confidence: 99%

Magnetically Functionalized Moss Biomass as Biosorbent for Efficient Co2+ Ions and Thioflavin T Removal

et al. 2020

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Microwave synthesized iron oxide nanoparticles and microparticles were used to prepare a magnetically responsive biosorbent from Rhytidiadelphus squarrosus moss for the rapid and efficient removal of Co2+ ions and thioflavin T (TT). The biocomposite was extensively characterized using Fourier transformed infrared (FTIR), XRD, SEM, and EDX techniques. The magnetic biocomposite showed very good adsorption properties toward Co2+ ions and TT e.g., rapid kinetics, high adsorption capacity (218 μmol g−1 for Co and 483 μmol g−1 for TT), fast magnetic separation, and good reusability in four successive adsorption–desorption cycles. Besides the electrostatic attraction between the oxygen functional moieties of the biomass surface and both Co2+ and TT ions, synergistic interaction with the –FeOH groups of iron oxides also participates in adsorption. The obtained results indicate that the magnetically responsive biocomposite can be a suitable, easily separable, and recyclable biosorbent for water purification.

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“…Among them, activated carbon had the best degreasing effect, with an adsorption rate of 95.74%. Songsaeng et al [109] added reduced graphene oxide to natural rubber latex to make a green adsorbent. The oil removal efficiency was higher than 70% after the material was reused 30 times.…”

Section: (B) Adsorption Methodsmentioning

confidence: 99%

Circulating purification of cutting fluid: an overview

Zhou³

et al. 2021

Int J Adv Manuf Technol

173

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Cutting fluid has cooling and lubricating properties and is an important part of the field of metal machining. Owing to harmful additives, base oils with poor biodegradability, defects in processing methods, and unreasonable emissions of waste cutting fluids, cutting fluids have serious pollution problems, which pose challenges to global carbon emissions laws and regulations. However, the current research on cutting fluid and its circulating purification technique lacks systematic review papers to provide scientific technical guidance for actual production. In this study, the key scientific issues in the research achievements of ecofriendly cutting fluid and waste fluid treatment are clarified. First, the preparation and mechanism of organic additives are summarized, and the influence of the physical and chemical properties of vegetable base oils on lubricating properties is analyzed. Then, the process characteristics of cutting fluid reduction supply methods are systematically evaluated. Second, the treatment of oil mist and miscellaneous oil, the removal mechanism and approach of microorganisms, and the design principles of integrated recycling equipment are outlined. The conclusion is concluded that the synergistic effect of organic additives, biodegradable vegetable base oils and recycling purification effectively reduces the environmental pollution of cutting fluids. Finally, in view of the limitations of the cutting fluid and its circulating purification technique, the prospects of amino acid additive development, self-adapting jet parameter supply system, matching mechanism between processing conditions and cutting fluid are put forward, which provides the basis and support for the engineering application and development of cutting fluid and its circulating purification.

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Natural rubber/reduced-graphene oxide composite materials: Morphological and oil adsorption properties for treatment of oil spills

Abstract: Graphical abstract

Cited by 82 publications

References 59 publications

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

Magnetically Functionalized Moss Biomass as Biosorbent for Efficient Co2+ Ions and Thioflavin T Removal

Circulating purification of cutting fluid: an overview

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