Sodium alginate/poly(vinyl alcohol) alloy membranes for the pervaporation, vapour permeation and vapour permeation with temperature difference separation of dimethylformamide/water mixtures: A comparative study

Kahya, Suat; Solak, Ebru Kondolot; Şanlı, Oya

doi:10.1016/j.vacuum.2010.01.033

Cited by 36 publications

(23 citation statements)

References 52 publications

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“…Similar results concerning the effect of membrane thickness on the pervaporation performance were also reported in the studies of Iş ıklan and Ş anlı [29], Kondolot Solak and Ş anlı [30,31], Kahya et al [32], Solak and Ş anlı [33]. However, contrary results are also available in literature.…”

Section: Effect Of Membrane Thickness In Pvsupporting

confidence: 83%

“…The acetone molecules are liable to be aggregated more than the water molecules since the freezing point of acetone (À95 C) is lower than that of water (0 C). As a result, the permeation flux increased with the increase in the membrane surrounding temperature, however separation factors decreased [32,44].…”

Section: Effect Of the Membrane Surrounding Temperature In Tdvpmentioning

confidence: 98%

“…In the literature Kahya S. and coworkers [32] have studied the separation of dimethylformamide/water mixtures using sodium alginate/poly(vinyl alcohol) alloy membranes by pervaporation, vapor permeation and vapor permeation with temperature difference methods. They have found that the permeation rate increased as the membrane surroundings temperature increased whereas the separation factor decreased.…”

Section: Effect Of the Membrane Surrounding Temperature In Tdvpmentioning

confidence: 99%

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Synthesis of magnetite in poly(vinyl alcohol) matrix and its use in separation of acetone/water mixtures via pervaporation, vapor permeation with and without temperature difference methods

Olukman

Şanlı

Solak

2015

Vacuum

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Section: Effect Of Membrane Thickness In Pvsupporting

confidence: 83%

Section: Effect Of the Membrane Surrounding Temperature In Tdvpmentioning

confidence: 98%

Section: Effect Of the Membrane Surrounding Temperature In Tdvpmentioning

confidence: 99%

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Synthesis of magnetite in poly(vinyl alcohol) matrix and its use in separation of acetone/water mixtures via pervaporation, vapor permeation with and without temperature difference methods

Olukman

Şanlı

Solak

2015

Vacuum

Self Cite

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“…For pure NaAlg stretching bands of CH group appear at 2,930 cm −1 . The peak at 1,630 cm −1 is due to the asymmetric stretching band of CO and peak at 1,410 cm −1 shows the symmetric stretching band of CO . The band at 1,030 cm −1 may be assigned to CC stretching vibrations of pyranose ring .…”

Section: Resultsmentioning

confidence: 96%

Free volume-related microstructural properties of lithium perchlorate/sodium alginate polymer composites

et al. 2013

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The effect of salt (LiClO 4 ) on free volume-related microstructural, optical, and dielectric properties of lithium perchlorate (LiClO 4 )-doped sodium alginate (NaC 6 H 7 O 6 ) n solid polymer electrolyte were studied using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), UV-Visible, dielectric measurements, and positron annihilation lifetime spectroscopy (PALS) techniques. The FTIR study reveal that the LiClO 4 interact with the OAH groups of sodium alginate (NaAlg) and forms charge transfer complex (CTC). These formed CTC within the composite film affect the optical property of the polymer composite, which was reflected from UV-Visible study. The free volume was probed by the PALS technique, which uses the o-Ps pickup lifetime s 3, as an indication of local electron density and mean free volume radius. The o-Ps pickup intensity I 3 , reflects the probability of o-Ps formation. The o-Ps components s 3 and I 3 increases with salt concentration, which shows microstructural modifications due to the decrease in the crystallinity of the NaAlg as observed from XRD studies. Therefore, electrical studies on the doped NaAlg reveal that the ionic movement in the composites is mainly due to the segmental motion of the polymer backbone. So, the complex formation due to doping affects the free volume-related microstructure and hence the dielectric properties including the AC conductivity of the polymer composites. POLYM.

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“…The results suggested that the hydrophilic functional groups i.e. -OH/ hydroxyl groups (at 3600-3300 cm -1 ) and carboxyl groups (at 3191-2898 cm -1 ) have interacted with each other and established a uniform mixture (Kahya et al, 2010). The bands at 3600-3300 cm -1 were ascribed to O-H stretching vibrational peaks of polyphenolic groups and the stripes at 3191-2898 cm -1 were attributed to -C-H/ -CH2/ CH3 stretching vibrational peaks of alkanes (Bekin et al, 20014).…”

Section: Ftir Powder Xrd Tga and Edx Analysesmentioning

confidence: 99%

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

Ali

Peng

Lin

et al. 2019

Journal of Environmental Management

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Current research is based on an innovative approach of the fabrication of encapsulated sustainable, green, phytogenic magnetic nanoparticles (PMNPs), to inhibit the generation of secondary pollutants (Iron/ Fe o) during water treatment applications. These novel bio-magnetic membrane capsules (BMMCs) were prepared using two-step titration gel crosslink method, with polyvinyl alcohol and sodium alginate matrix as the model encapsulating materials to eliminate potentially toxic metals (Pb 2+ and Cd 2+) from water. The development of BMMCs was characterized by FTIR, XRD, XPS, SEM, VSM, TGA and EDX techniques. The effects of various operating parameters, adsorbent dose, contact time, solution pH, temperature, initial concentration of metals cations and co-existing ions were studied. The hysteresis loops have illustrated an excellent super-paramagnetic nature, demonstrating the smooth encapsulation of PMNPs without losing their magnetic properties. The maximum monolayer adsorptive capacities estimated at pH 6.5 by the Langmuir isotherm model were 548 and 610.67 mg/g for Pb 2+ and Cd 2+ , respectively. The novel BMMCs did not only control oxidation of PMNPs but also sustained the adsorptive removal over a wide range of pH (3-8), and the electrostatic interaction and ion-exchange were the core adsorption mechanisms. The BMMCs could easily be regenerated using 25% HNO3 as an eluent for successful usage in seven repeated cycles. Therefore, the BMMCs as a material can be used as an excellent sorbent or composite material to remove toxic metals Pb 2+ and Cd 2+ , showing strong potential for improving water and wastewater treatment technologies.

show abstract

Sodium alginate/poly(vinyl alcohol) alloy membranes for the pervaporation, vapour permeation and vapour permeation with temperature difference separation of dimethylformamide/water mixtures: A comparative study

Cited by 36 publications

References 52 publications

Synthesis of magnetite in poly(vinyl alcohol) matrix and its use in separation of acetone/water mixtures via pervaporation, vapor permeation with and without temperature difference methods

Synthesis of magnetite in poly(vinyl alcohol) matrix and its use in separation of acetone/water mixtures via pervaporation, vapor permeation with and without temperature difference methods

Free volume-related microstructural properties of lithium perchlorate/sodium alginate polymer composites

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

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