Enhanced Oil Spill Remediation by Adsorption with Interlinked Multilayered Graphene

Vocciante, Marco; Finocchi, Antonio; Auris, Alessandra De Folly D; Conte, Alessandro; Tonziello, Jacopo; Pola, Annalisa; Reverberi, Andrea P.

doi:10.3390/ma12142231

Cited by 34 publications

(18 citation statements)

References 27 publications

(32 reference statements)

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“…A further step forward in the minimization of environmental impact of NPs manufacturing is offered by top-down physical methods [23], in which a nanomaterial is formed starting from elements or compounds in macroscopic sizes undergoing treatments without any chemical reaction. Several disaggregation techniques have been proposed [24], whose classification generally depends on the presence/absence of milling media like spheres or beads in a vessel containing the phase subject to comminution [25].…”

Section: Composition Of the Vessel Contentmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles by Low-Energy Wet Bead Milling of Metal Spheres

et al. 2019

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A low-energy, magnetically-driven milling technique for the synthesis of silver nanoparticles is proposed, where the grinding medium and the metal precursor consisting of silver spheres have the same shape and size, belonging to a millimetric scale. The process is carried out at room temperature in aqueous solvent, where different types of capping agents have been dissolved to damp particle agglomeration. The particle diameters, determined by dynamic light scattering and transmission electron microscopy, have been compared with those typical of conventional wet-chemical bottom-up synthesis processes. The use of milling spheres and metal precursor of the same initial shape and size allows to overcome some drawbacks and limitations distinctive of conventional bead-milling equipment, generally requiring complex operations of separation and recovery of milling media. The milling bead/nanoparticle diameter ratio obtained by this approach is higher than that typical of most previous wet bead milling techniques. The method described here represents a simple, one-pot, cost-effective, and eco-friendly process for the synthesis of metal nanoparticles starting from a bulky solid.

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Section: Composition Of the Vessel Contentmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles by Low-Energy Wet Bead Milling of Metal Spheres

et al. 2019

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“…Simultaneously, the light organic compounds in asphalt and the free radicals generated by thermal-oxidization can be partially inserted between EG layers or adsorbed on the surface of EG. This prevents the chain reaction during the isothermal-oxidative aging of asphalt so that the aging process is suppressed [39]. Furthermore, from Table 2, EDS test results show that Ca and Mg elements are detected on the surface of asphalt after adding EG/MH/CaCO 3 , which proves the filling effects of MH and CaCO 3 nanoparticles.…”

Section: Morphology and Elemental Changes Of Asphalt And Asphalt/eg/mmentioning

confidence: 86%

Improvements of Developed Graphite Based Composite Anti-Aging Agent on Thermal Aging Properties of Asphalt

Liu

et al. 2020

Materials

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To reduce the thermal-oxidative aging of asphalt and the release amount of harmful volatiles during the construction of asphalt pavement, a new composite anti-aging agent was developed. Since the volatiles were mainly released from saturates and aromatics during the thermal-oxidative aging of asphalt, expanded graphite (EG) was selected as a stabilizing agent to load magnesium hydroxide (MH) and calcium carbonate (CaCO3) nanoparticles for preparing the anti-aging agents of saturates and aromatics, respectively. Thermal stability and volatile constituents released from saturates and aromatics before and after the thermal-oxidative aging were characterized using the isothermal Thermogravimetry/Differential Scanning Calorimetry-Fourier Transform Infrared Spectrometer test (TG/DSC-FTIR test). Test results indicate that anti-aging agents of EG/MH and EG/CaCO3 effectively inhibit the volatilization of light components in asphalt and improve the thermal stability of saturates and aromatics. Then, the proportions of EG, MH, and CaCO3 added in the developed composite anti-aging agent of EG/MH/CaCO3 are 2:1:3 by weight. EG/MH/CaCO3 plays a synergetic effect on inhibiting the thermal-oxidative aging of asphalt, and reduces the release amount of harmful volatiles during the thermal-oxidative aging after EG/MH/CaCO3 is added into asphalt at the proposed content of 10 wt.%. EG plays a synergistic role with MH and CaCO3 nanoparticles to prevent the chain reactions, inhibiting the thermal-oxidative aging of asphalt.

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“…), the selection of which, however, is far from trivial and deserves extensive attention to avoid a suboptimal choice or the failure of the reclamation activity [3]. In general, adsorption-based technologies have proven to be among the most viable alternatives proposed for the treatment of industrial wastewater contaminated by a wide variety of pollutants, both organic [4] and inorganic [5,6], due to the low processing and instrumentation costs, the simplicity of operation, and the availability of different types of low-cost and environmentally friendly adsorbents. A wide range of materials, including activated carbon [7], metal oxides, carbon nanotubes, polymers, agricultural residues [8], and natural and modified clays [9], have been used successfully to adsorb heavy metals from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Chromium(III) Removal from Wastewater by Chitosan Flakes

et al. 2020

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Chitosan is very effective in removing metal ions through their adsorption. A preliminary investigation of the adsorption of chromium(III) by chitosan was carried out by means of batch tests as a function of contact time, pH, ion competition, and initial chromium(III) concentration. The rate of adsorption was rather rapid (t1/2 < 18 min) and influenced by the presence of other metal ions. The obtained data were tested using the Langmuir and Freundlich isotherm models and, based on R2 values, the former appeared better applicable than the latter. Chitosan was found to have an excellent loading capacity for chromium(III), namely 138.0 mg Cr per g of chitosan at pH = 3.8, but metal ions adsorption was strongly influenced by the pH. About 76% of the recovered chromium was then removed simply by washing the used chitosan with 0.1 M EDTA (Ethylenediaminetetraacetic acid) solution. This study demonstrates that chitosan has the potential to become an effective and low-cost agent for wastewater treatment (e.g., tannery waste) and in situ environmental remediation.

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Enhanced Oil Spill Remediation by Adsorption with Interlinked Multilayered Graphene

Cited by 34 publications

References 27 publications

Green Synthesis of Silver Nanoparticles by Low-Energy Wet Bead Milling of Metal Spheres

Green Synthesis of Silver Nanoparticles by Low-Energy Wet Bead Milling of Metal Spheres

Improvements of Developed Graphite Based Composite Anti-Aging Agent on Thermal Aging Properties of Asphalt

Chromium(III) Removal from Wastewater by Chitosan Flakes

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