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Tejraj M Aminabhavi - One of the best experts on this subject based on the ideXlab platform.

  • textile waste dyes inorganic salts separation of cerium oxide loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

  • Textile waste, dyes/inorganic salts separation of cerium oxide-loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

Tohid Tavangar - One of the best experts on this subject based on the ideXlab platform.

  • textile waste dyes inorganic salts separation of cerium oxide loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

  • Textile waste, dyes/inorganic salts separation of cerium oxide-loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

Milena Ginic-markovic - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Fabrication Approach for Multifunctional Graphene-based Thin Film Nano-composite Membranes with Enhanced Desalination and Antibacterial Characteristics.
    Scientific reports, 2017
    Co-Authors: Hanaa M. Hegab, Ahmed Elmekawy, Thomas G. Barclay, Andrew Michelmore, Linda Zou, Dusan Losic, Christopher P. Saint, Milena Ginic-markovic
    Abstract:

    A practical fabrication technique is presented to tackle the trade-off between the water flux and salt rejection of thin film composite (TFC) reverse osmosis (RO) Membranes through controlled creation of a thinner active selective polyamide (PA) layer. The new thin film nano-composite (TFNC) RO Membranes were synthesized with multifunctional poly tannic acid-functionalized graphene oxide nanosheets (pTA-f-GO) embedded in its PA thin active layer, which is produced through interfacial polymerization. The incorporation of pTA-f-GOL into the fabricated TFNC Membranes resulted in a thinner PA layer with lower roughness and higher hydrophilicity compared to Pristine Membrane. These properties enhanced both the Membrane water flux (improved by 40%) and salt rejection (increased by 8%) of the TFNC Membrane. Furthermore, the incorporation of biocidal pTA-f-GO nanosheets into the PA active layer contributed to improving the antibacterial properties by 80%, compared to Pristine Membrane. The fabrication of the pTA-f-GO nanosheets embedded in the PA layer presented in this study is a very practical, scalable and generic process that can potentially be applied in different types of separation Membranes resulting in less energy consumption, increased cost-efficiency and improved performance.

  • Fine-Tuning the Surface of Forward Osmosis Membranes via Grafting Graphene Oxide: Performance Patterns and Biofouling Propensity
    ACS applied materials & interfaces, 2015
    Co-Authors: Hanaa M. Hegab, Ahmed Elmekawy, Thomas G. Barclay, Andrew Michelmore, Linda Zou, Christopher P. Saint, Milena Ginic-markovic
    Abstract:

    Graphene oxide (GO) nanosheets were attached to the polyamide selective layer of thin film composite (TFC) forward osmosis (FO) Membranes through a poly l-Lysine (PLL) intermediary using either layer-by-layer or hybrid (H) grafting strategies. Fourier transform infrared spectroscopy, zeta potential, and thermogravimetric analysis confirmed the successful attachment of GO/PLL, the surface modification enhancing both the hydrophilicity and smoothness of the Membrane’s surface demonstrated by water contact angle, atomic force microscopy, and transmission electron microscopy. The biofouling resistance of the FO Membranes determined using an adenosine triphosphate bioluminescence test showed a 99% reduction in surviving bacteria for GO/PLL-H modified Membranes compared to Pristine Membrane. This antibiofouling property of the GO/PLL-H modified Membrane was reflected in reduced flux decline compared to all other samples when filtering brackish water under biofouling conditions. Further, the high density and tig...

Kakarla Raghava Reddy - One of the best experts on this subject based on the ideXlab platform.

  • textile waste dyes inorganic salts separation of cerium oxide loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

  • Textile waste, dyes/inorganic salts separation of cerium oxide-loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

Mashallah Rezakazemi - One of the best experts on this subject based on the ideXlab platform.

  • textile waste dyes inorganic salts separation of cerium oxide loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.

  • Textile waste, dyes/inorganic salts separation of cerium oxide-loaded loose nanofiltration polyethersulfone Membranes
    Chemical Engineering Journal, 2020
    Co-Authors: Tohid Tavangar, Mohammad Karimi, Mashallah Rezakazemi, Kakarla Raghava Reddy, Tejraj M Aminabhavi
    Abstract:

    Abstract Poly(ether sulfone) (PES) loose nanofiltration nanocomposite Membranes were prepared by incorporating cerium oxide (CeO2) nanoparticles (NPs) via a non-solvent induced phase separation technique. The influence of NPs on thermodynamic and kinetic aspects of phase separation was studied by phase diagram construction and viscosity measurement. FESEM images exhibited asymmetric structure of the Membranes with a dense top layer, while contact angle measurements confirmed improved Membrane hydrophilicity. The performances of the Membranes were tested by aqueous dye solutions viz., Direct Red 23, Congo Red, and Direct Red 243 as well as real textile wastewater. Low rejection rates were observed for different aqueous salt solutions following the sequence: MgSO4 (4.1%) > Na2SO4 (3.3%) > MgCl2 (1.8%) > NaCl (1.2%). The nanocomposites exhibit remarkable antifouling properties compared to the Pristine Membrane.