Iono-molecular Separation with Composite Membranes. VIII. Recuperative aluminium ions separation on capilary Polypropylene S-EPDM composite membranes

Nafliu, Ion Marius; Al-Ani, Hussam Nadum Abdalraheem; Grosu, Alexandra Raluca; Albu, Paul Constantin; Nechifor, Gheorghe

doi:10.37358/mp.19.1.5117

Cited by 6 publications

(9 citation statements)

References 10 publications

(18 reference statements)

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“…In this paper, a method is considered to obtain a liquid membrane based on aliphaticalcohol-containing dispersed osmium nanoparticles, on a resistant physical-chemical support consisting of polypropylene hollow fiber membranes [46,47]. Osmium nanoparticles were obtained directly on the membrane support (Figure 2) by reducing osmium tetroxide, from t-butanol with 10-undecenoic acid (UDA) to i-propanol, t-butanol or n-decanol solution.…”

Section: Resultsmentioning

confidence: 99%

Osmium Recovery as Membrane Nanomaterials through 10–Undecenoic Acid Reduction Method

et al. 2021

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The recovery of osmium from residual osmium tetroxide (OsO4) is a necessity imposed by its high toxicity, but also by the technical-economic value of metallic osmium. An elegant and extremely useful method is the recovery of osmium as a membrane catalytic material, in the form of nanoparticles obtained on a polymeric support. The subject of the present study is the realization of a composite membrane in which the polymeric matrix is the polypropylene hollow fiber, and the active component consists of the osmium nanoparticles obtained by reducing an alcoholic solution of osmium tetroxides directly on the polymeric support. The method of reducing osmium tetroxide on the polymeric support is based on the use of 10-undecenoic acid (10–undecylenic acid) (UDA) as a reducing agent. The osmium tetroxide was solubilized in t–butanol and the reducing agent, 10–undecenoic acid (UDA), in i–propanol, t–butanol or n–decanol solution. The membranes containing osmium nanoparticles (Os–NP) were characterized morphologically by the following: scanning electron microscopy (SEM), high-resolution SEM (HR–SEM), structurally: energy-dispersive spectroscopy analysis (EDAX), Fourier transform infrared (FTIR) spectroscopy. In terms of process performance, thermal gravimetric analysis was performed by differential scanning calorimetry (TGA, DSC) and in a redox reaction of an organic marker, p–nitrophenol (PNP) to p–aminophenol (PAP). The catalytic reduction reaction with sodium tetraborate solution of PNP to PAP yielded a constant catalytic rate between 2.04 × 10−4 mmol s–1 and 8.05 × 10−4 mmol s−1.

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Section: Resultsmentioning

confidence: 99%

Osmium Recovery as Membrane Nanomaterials through 10–Undecenoic Acid Reduction Method

et al. 2021

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“…The fluxes from the source phase [ 61 , 62 ] were determined against the measured permeate mass within a determined time range, applying the following equation:

where: M = permeate mass (g); S = the effective surface of the membrane (m 2 ); t = the time necessary to collect the permeate volume (h).…”

Section: Methodsmentioning

confidence: 99%

Accessible Silver-Iron Oxide Nanoparticles as a Nanomaterial for Supported Liquid Membranes

et al. 2021

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The present study introduces the process performances of nitrophenols pertraction using new liquid supported membranes under the action of a magnetic field. The membrane system is based on the dispersion of silver–iron oxide nanoparticles in n-alcohols supported on hollow microporous polypropylene fibers. The iron oxide–silver nanoparticles are obtained directly through cyclic voltammetry electrolysis run in the presence of soluble silver complexes ([AgCl2]−; [Ag(S2O3)2]3−; [Ag(NH3)2]+) and using pure iron electrodes. The nanostructured particles are characterized morphologically and structurally by scanning electron microscopy (SEM and HFSEM), EDAX, XRD, and thermal analysis (TG, DSC). The performances of the nitrophenols permeation process are investigated in a variable magnetic field. These studies show that the flux and extraction efficiency have the highest values for the membrane system embedding iron oxide–silver nanoparticles obtained electrochemically in the presence of [Ag(NH3)2]+ electrolyte. It is demonstrated that the total flow of nitrophenols through the new membrane system depends on diffusion, convection, and silver-assisted transport.

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“…The commercially available capillary hollow fibers support (PPSM) was made from surface-modified polypropylene (PP) to provide optimal porosity ( Table 1 ) [ 74 ]. For impregnation of the capillary bundle, they were placed in a U-shape.…”

Section: Methodsmentioning

confidence: 99%

“…The percentage of the inclusion membrane (IM) was calculated using the following equation [ 73 , 74 ]:

where: Wi and Wt are the masses of the PPMS and the Ag-Cell-Ac-PPM membranes, respectively.…”

Section: Methodsmentioning

confidence: 99%

Removing of the Sulfur Compounds by Impregnated Polypropylene Fibers with Silver Nanoparticles-Cellulose Derivatives for Air Odor Correction

et al. 2021

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The unpleasant odor that appears in the industrial and adjacent waste processing areas is a permanent concern for the protection of the environment and, especially, for the quality of life. Among the many variants for removing substance traces, which give an unpleasant smell to the air, membrane-based methods or techniques are viable options. Their advantages consist of installation simplicity and scaling possibility, selectivity; moreover, the flows of odorous substances are direct, automation is complete by accessible operating parameters (pH, temperature, ionic strength), and the operation costs are low. The paper presents the process of obtaining membranes from cellulosic derivatives containing silver nanoparticles, using accessible raw materials (namely motion picture films from abandoned archives). The technique used for membrane preparation was the immersion precipitation for phase inversion of cellulosic polymer solutions in methylene chloride: methanol, 2:1 volume. The membranes obtained were morphologically and structurally characterized by scanning electron microscopy (SEM) and high resolution SEM (HR SEM), energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectrometry (FTIR), thermal analysis (TG, ATD). Then, the membrane performance process (extraction efficiency and species flux) was determined using hydrogen sulfide (H2S) and ethanethiol (C2H5SH) as target substances.

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Iono-molecular Separation with Composite Membranes. VIII. Recuperative aluminium ions separation on capilary Polypropylene S-EPDM composite membranes

Cited by 6 publications

References 10 publications

Osmium Recovery as Membrane Nanomaterials through 10–Undecenoic Acid Reduction Method

Osmium Recovery as Membrane Nanomaterials through 10–Undecenoic Acid Reduction Method

Accessible Silver-Iron Oxide Nanoparticles as a Nanomaterial for Supported Liquid Membranes

Removing of the Sulfur Compounds by Impregnated Polypropylene Fibers with Silver Nanoparticles-Cellulose Derivatives for Air Odor Correction

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