Multifunctional graphene oxide loaded nanofibrous membrane for removal of dyes and coliform from water

Sundaran, Suja P.; Reshmi, C.R.; Sagitha, P.; Manaf, O.; Sujith, A.

doi:10.1016/j.jenvman.2019.03.105

Cited by 78 publications

(24 citation statements)

References 36 publications

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“…Such behavior may be due to at lower values of pH the OH groups on the bentonite surface became protonated as −OH 2 + which results in electrostatic repulsion between the bentonite surface and the cationic dyes [65] owing to the presence of −N + groups as seen from their molecular structure representing in Figure S1 (See Supporting Information). On increasing the pH value, the surface −OH group of bentonite exist as −O − and hence the electrostatic attraction between the surface and the cationic dyes occurs which eventually leads to increasing the sorption efficiency [64,65] . From the above results, the optimum value of pH at which the maximum dye elimination for the three dyes occurred was found to be 10.…”

Section: Resultsmentioning

confidence: 99%

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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In this study, natural bentonite has been used as a highly efficient, and low‐cost sorbent for the adsorptive removal of methylene blue (MB), crystal violet (CV), and fuchsine basic (FB) dyes from aqueous solutions. X‐ray fluorescence (XRF), Thermogravimetry and differential thermal analyses (TG‐DTA), X‐ray diffraction (XRD), Scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) analyses for bentonite clay were performed. Results revealed that bentonite is an excellent sorbent for the elimination of these dyes with maximum adsorption capacities of 598.8, 929.7 and 875.2 mg g−1 for MB, CV, and FB, respectively. In addition, thermodynamic results reflected that the adsorption process is a spontaneous, endothermic, and of chemisorption nature. While kinetic studies specified that the adsorption of these dyes is ruled by the film diffusion and pore diffusion mechanism. Moreover, simultaneous removal of these dyes from their binary and ternary mixtures was also examined. A Regeneration study demonstrated that, bentonite can be recycled several times with almost the same efficiency.

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Section: Resultsmentioning

confidence: 99%

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Said

Goda

2021

ChemistrySelect

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“…The tensile strength increases from M3-0.1% SGO (1.19) to M7-0.5% (1.40) by increasing the concentration of SGO nanoparticles from 0.1% to 0.5% as shown in Figure 8. This result shows that by increasing the SGO concentration, membranes become stiffer and stronger [32]. However, the tensile strength of the pure polymeric membrane is greater than the polymeric doped membrane.…”

Section: Temperture (°C)mentioning

confidence: 86%

Fabrication and Characterization of Sulfonated Graphene Oxide (SGO) Doped PVDF Nanocomposite Membranes with Improved Anti-Biofouling Performance

et al. 2021

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Emergence of membrane technology for effective performance is qualified due to its low energy consumption, no use of chemicals, high removal capacity and easy accessibility of membrane material. The hydrophobic nature of polymeric membranes limits their applications due to biofouling (assemblage of microorganisms on surface of membrane). Polymeric nanocomposite membranes emerge to alleviate this issue. The current research work was concerned with the fabrication of sulfonated graphene oxide doped polyvinylidene fluoride (PVDF) membrane and investigation of its anti-biofouling and anti-bacterial behavior. The membrane was fabricated through phase inversion method, and its structure and morphology were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-rays diffraction (XRD) and thermo gravimetric analysis (TGA) techniques. Performance of the membrane was evaluated via pure water flux; anti-biofouling behavior was determined through Bovine Serum albumin (BSA) rejection. Our results revealed that the highest water flux was shown by M7 membrane about 308.7 Lm−2h−1/bar having (0.5%) concentration of SGO with improved BSA rejection. Furthermore, these fabricated membranes showed high antibacterial activity, more hydrophilicity and mechanical strength as compared to pristine PVDF membranes. It was concluded that SGO addition within PVDF polymer matrix enhanced the properties and performance of membranes. Therefore, SGO was found to be a promising material for the fabrication of nanocomposite membranes.

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“…Three measurements of the permeate ow were performed for each of the de ned pressures, and the results were obtained following Eq. 2 [27].…”

Section: Permeabilitymentioning

confidence: 99%

Integrated Treatment of Mining Dam Wastewater with Quaternized Chitosan and PAN/HPMC/AgNo3 Nanostructured Hydrophylic Membranes

et al. 2021

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This study was developed a novel nanostructured membrane by electrospinning process, from polyacrylonitrile (PAN) modify by hydroxypropyl methylcellulose (HPMC) polymers containing AgNO 3 , to be used as a lter in an integrated wastewater dam treatment process to reuse it as drinking water. Different formulations (108 samples) were electrospun from PAN and (0, 5, 10%w) HPMC and (0, 0.5, 1%w) solutions to selected a more e cient formulation in water disinfection and higher hydrophilic character of the membrane to ow performance in the wastewater treatment. The PAN and HPMC phases in membranes were characterize by infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The nanostructured membranes (SEM) were characterized by thickness ber between 251 ± 58 and 306 ± 49 nm and lower ber/membrane volume relations. The presence of HPMC and AgNO 3 in membrane formulation endows superhydrophilicity and permeability increase which up to 21,151 ± 445 L.m -2 .h -1 . After ltration process with PAN/HPMC/AgNO 3 , all the tested water potability indexes were achieved. The primary treatment, using quaternized chitosan reduced the turbidity parameter from 19,000 NTU to 14 NTU, and after ltration with nanostructured membrane, to levels was below 1 NTU and pathogenic potential removed (Total Coliform and Escherichia coli). The results of this study indicated that the hydrophilic nanostructured membranes PAN/10%HPMC/1%AgNO 3 have adequate properties to potential wastewater treatment mining for reuse. It´s give a sustainable strategy for managing wastewater which should be reduce the volume of water in the tailing's dams and contributes to increasing the stability of dams and reducing risks with catastrophic environmental impact.

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Multifunctional graphene oxide loaded nanofibrous membrane for removal of dyes and coliform from water

Cited by 78 publications

References 36 publications

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Superior Competitive Adsorption Capacity of Natural Bentonite in the Efficient Removal of Basic Dyes from Aqueous Solutions

Fabrication and Characterization of Sulfonated Graphene Oxide (SGO) Doped PVDF Nanocomposite Membranes with Improved Anti-Biofouling Performance

Integrated Treatment of Mining Dam Wastewater with Quaternized Chitosan and PAN/HPMC/AgNo3 Nanostructured Hydrophylic Membranes

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