Effective adsorption of antidiabetic pharmaceutical (metformin) from aqueous medium using graphene oxide nanoparticles: Equilibrium and statistical modelling

Balasubramani, K.; Sivarajasekar, N.; Naushad, Mu.

doi:10.1016/j.molliq.2019.112426

Cited by 137 publications

(46 citation statements)

References 52 publications

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“…Along with Figure 2 , these data provided a comprehensive analysis of the hydrophilicity, hydrophobicity, and permeability of GO membranes. The adsorption of PPCPs by GO membranes is determined by the properties of the membrane and the PPCPs [ 29 , 48 ]. The stronger the hydrophobicity of the membrane, the weaker the permeability.…”

Section: Resultsmentioning

confidence: 99%

“…Unlike traditional nanofiltration membranes, which rely mainly on electrostatic repulsion, the removal of hydrophobic PPCPs in the molecular state by GO membranes was mainly due to adsorption and molecular sieving. The adsorption was mainly determined by the hydrophilic and hydrophobic properties of the membrane and PPCPs [ 29 ]. The stronger the hydrophobicity of the membrane and the stronger the hydrophobicity of PPCPs, the greater the amount of PPCPs adsorbed by the membrane.…”

Section: Discussionmentioning

confidence: 99%

“…Adsorption, as in nanofiltration, is one of the most promising and effective treatments for the removal of different types of micropollutants if the adsorbent is reusable [ 28 , 29 ]. In recent years, graphene has become a popular material, attracting attention in the fields of chemistry, physics, and materials science because of its optimal electronic, thermal, and mechanical properties [ 30 , 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Cross-Linked Graphene Oxide on Polyethersulfone Membrane for Pharmaceuticals and Personal Care Products Removal

et al. 2020

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The unique two-dimensional structure and chemical properties of graphene oxide (GO) provide a convenient method for preparing novel membranes. In this study, GO membranes were prepared through filtration by a pressure-assisted self-assembly method involving the cross-linking of three diamine monomers on a polyethersulfone (PES) support. The different small molecular diamines, ethylenediamine, butanediamine, and p-phenylenediamine, were introduced as cross-linking agents to investigate the effect of diamine on the properties of GO membranes. The hydrophobic substances ibuprofen, gemfibrozil, and triclosan were selected as target pharmaceuticals and personal care products (PPCPs). The adsorption and molecular sieving activities of PPCPs by cross-linked GO membranes at a pH of 3 were investigated. The permeate water was analyzed for dissolved organic carbon, ultraviolet absorption at 254 nm, molecular weight distribution, and fluorescence excitation–emission matrices. The results showed that the removal of hydrophobic PPCPs by GO membranes was mainly due to their adsorption and molecular sieving activities. Adsorption was mainly determined by the hydrophilic and hydrophobic properties of the membranes and PPCPs. The interception effect was mainly determined by the interlayer spacing between the GO membranes and the molecular weight and steric hindrance of the PPCPs. A smaller spacing of the GO membrane layers resulted in greater steric hindrance and a higher removal rate.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of Cross-Linked Graphene Oxide on Polyethersulfone Membrane for Pharmaceuticals and Personal Care Products Removal

et al. 2020

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“…Adsorption is considered to be the most attractive treatment method owing to its significant benefits such as economic features, reliability, and its ability to prevent the entry of secondary toxic substances by restricting their transfer into the aquatic environment [19,20]. Researchers have studied the capabilities of different adsorbents in relation to antibiotic adsorption such as metal-organic framework, carbon-based material, montmorillonite, zeolite, graphene oxide and activated carbon [21][22][23][24]. Owing to low-cost, a high density of active sites, significant adsorption capacity, and a high specific surface area, activated carbons (ACs) are proper adsorbent for pollutant removal of particulate antibiotics [22,25].…”

Section: Introductionmentioning

confidence: 99%

Nano-Size Biomass Derived from Pomegranate Peel for Enhanced Removal of Cefixime Antibiotic from Aqueous Media: Kinetic, Equilibrium and Thermodynamic Study

Bidhendi

Poursorkh

Sereshti

et al. 2020

IJERPH

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Nano-sized activated carbon was prepared from pomegranate peel (PG-AC) via NaOH chemical activation and was fully characterized using BET, FT-IR, FE-SEM, EDX, and XRD. The newly synthesized PG-AC was used for cefixime removal from the aqueous phase. The effective parameters on the adsorption process, including solution pH (2–11), salt effect (0–10%), adsorbent dosage (5–50 mg), contact time (5–300 min), and temperature (25–55 °C) were examined. The experimental adsorption equilibrium was in close agreement with the type IV isotherm model set by the International Union of Pure and Applied Chemistry (IUPAC). The adsorption process was evaluated with isotherm, kinetic, and thermodynamic models and it is were well fitted to the Freundlich isotherm (R2 = 0.992) and pseudo-second-order model (R2 = 0.999). The Langmuir isotherm provided a maximum adsorption capacity of 181.81 mg g−1 for cefixime uptake onto PG-AC after 60 min at pH 4. Hence, the isotherm, kinetic and thermodynamic models were indicated for the multilayer sorption followed by the exothermic physical adsorption mechanism.

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“…Adsorbents should be as green as possible and at the same time, they should be able to perform an efficient treatment toward the removal of a target compound. Several nanoscale materials have been successfully used as adsorbents toward a variety of synthetic chemicals removal 35–44 . However, it has to be considered that their further recovery from wastewater after treatment is, more often than researchers wish, tedious, and complicated.…”

Section: Introductionmentioning

confidence: 99%

Tillandsia Aeranthos flower‐like magnetic nanostructures confined into polyvinyl alcohol beads

Actis

Zélis

Álvarez

et al. 2020

J of Applied Polymer Sci

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Magnetic beads composed by polyvinyl alcohol and iron oxides were developed and fully characterized. The materials were not only cross‐linked by a physical treatment but also the magnetic nanoparticles (MNPs) are acting as cross‐linking dots. Interestingly, the analysis of scanning electron micrographs revealed that, in the case of hydrated samples, flower‐like structures (average diameter 6–9 μm) being constituted by MNPs were present, whereas when the beads were dried the MNPs structure changed to porous spheres (average diameter 2–3 μm). Some of the prepared materials were tested to determine their capability to act as water remediation devices, and good removal results were obtained toward both methylene blue (average removal efficiency higher than 80%) and methyl orange (average removal efficiency lower than 30%) adsorption. The experiments performed confirmed that the adsorbent, once the treatment has ended, can be removed off through the simple employment of a permanent magnet.

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Effective adsorption of antidiabetic pharmaceutical (metformin) from aqueous medium using graphene oxide nanoparticles: Equilibrium and statistical modelling

Cited by 137 publications

References 52 publications

Preparation of Cross-Linked Graphene Oxide on Polyethersulfone Membrane for Pharmaceuticals and Personal Care Products Removal

Preparation of Cross-Linked Graphene Oxide on Polyethersulfone Membrane for Pharmaceuticals and Personal Care Products Removal

Nano-Size Biomass Derived from Pomegranate Peel for Enhanced Removal of Cefixime Antibiotic from Aqueous Media: Kinetic, Equilibrium and Thermodynamic Study

Tillandsia Aeranthos flower‐like magnetic nanostructures confined into polyvinyl alcohol beads

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