Comparative analysis of the processes of collagen concentration by ultrafiltration using different types of membranes

Batrinescu, Gheorghe; Scutariu, Roxana Elena; Nechifor, Gheorghe; Ionescu, Ioana; Iancu, Vasile Ion

doi:10.1002/app.50055

Cited by 6 publications

(6 citation statements)

References 28 publications

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“…The filming of the cellulose acetate solution in N-methylpyrolidine (NMP) was performed at room temperature and humidity, using a certain amount of 10% polymer solution by applying it directly to a smooth glass surface (intended for thin-layer chromatography) to a thickness of 500 μm. The immersion in the ethanol-water (EW) coagulation bath in a 1:2 volume ratio was performed after a predetermined time [53,54].…”

Section: Reagents and Materialsmentioning

confidence: 99%

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Reactional Processes on Osmium–Polymeric Membranes for 5–Nitrobenzimidazole Reduction

et al. 2021

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Membranes are associated with the efficient processes of separation, concentration and purification, but a very important aspect of them is the realization of a reaction process simultaneously with the separation process. From a practical point of view, chemical reactions have been introduced in most membrane systems: with on-liquid membranes, with inorganic membranes or with polymeric and/or composite membranes. This paper presents the obtaining of polymeric membranes containing metallic osmium obtained in situ. Cellulose acetate (CA), polysulfone (PSf) and polypropylene hollow fiber membranes (PPM) were used as support polymer membranes. The metallic osmium is obtained directly onto the considered membranes using a solution of osmium tetroxide (OsO4), dissolved in tert–butyl alcohol (t–Bu–OH) by reduction with molecular hydrogen. The composite osmium–polymer (Os–P)-obtained membranes were characterized in terms of the morphological and structural points of view: scanning electron microscopy (SEM), high-resolution SEM (HR–SEM), energy-dispersive spectroscopy analysis (EDAX), Fourier Transform Infra-Red (FTIR) spectroscopy, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The process performance was tested for reduction of 5–nitrobenzimidazole to 5–aminobenzimidazole with molecular hydrogen. The paper presents the main aspects of the possible mechanism of transformation of 5–nitrobenzimidazole to 5–aminobenzimidazole with hydrogen gas in the reaction system with osmium–polymer membrane (Os–P).

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Section: Reagents and Materialsmentioning

confidence: 99%

“…The Fourier Transform Infra-Red (FTIR) spectra obtained for the three composite membranes do not show differences in the position of the absorption bands compared to those of the base polymers [52][53][54].…”

Section: Compositional Characterization Of Membranesmentioning

confidence: 99%

Reactional Processes on Osmium–Polymeric Membranes for 5–Nitrobenzimidazole Reduction

et al. 2021

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“…The flows of the silver ions (or lead ions) from the source phase [45,46] were determined against the measured permeate mass within a determined time range, applying the following formula:…”

Section: The Transport and Separation Of The Silver Ionsmentioning

confidence: 99%

Transport and Separation of the Silver Ion with n–decanol Liquid Membranes Based on 10–undecylenic Acid, 10–undecen–1–ol and Magnetic Nanoparticles

et al. 2021

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This paper presents a transport and recovery of silver ions through bulk liquid membranes based on n–decanol using as carriers 10–undecylenic acid and 10–undecylenyl alcohol. The transport of silver ions across membranes has been studied in the presence of two types of magnetic oxide nanoparticles obtained by the electrochemical method with iron electrodes in the electrolyte with and without silver ions, which act as promoters of turbulence in the membrane. Separation of silver ions by bulk liquid membranes using 10–undecylenic acid and 10–undecylenyl alcohol as carriers were performed by comparison with lead ions. The configuration of the separation module has been specially designed for the chosen separation process. Convective-generating magnetic nanoparticles were characterized in terms of the morphological and structural points of view: scanning electron microscopy (SEM), high-resolution SEM (HR–SEM), energy dispersive spectroscopy analysis (EDAX), Fourier Transform InfraRed (FTIR) spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimetry and magnetization. The process performance (flux and selectivity) was tested were tested for silver ion transport and separation through n–decanol liquid membranes with selected carriers. Under the conditions of the optimized experimental results (pH = 7 of the source phase, pH = 1 of the receiving phase, flow rate of 30 mL/min for the source phase and 9 mL/min for the receiving phase, 150 rot/min agitation of magnetic nanoparticles) separation efficiencies of silver ions of over 90% were obtained for the transport of undecenoic acid and about 80% for undecylenyl alcohol.

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“…However, the main drawback of membrane processes' large-scale adoption is represented by clogging and maintenance requirements [4,5]. Thus, the majority of research works in the field performed on laboratory or pilot installations are focusing on delivering to industry better membrane materials that allow less intensive operation/maintenance effort [6,7].…”

Section: Introductionmentioning

confidence: 99%

Polysulfone and cellulose acetate-based membranes' potential application to photocatalytic membrane reactors

Constantin,

Ionescu

et al. 2023

RJEEC

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Polysulfone (Psf) and Cellulose acetate (Ac-Cel) based membranes were synthesized via immersion precipitation–phase inversion techniques, starting from initial polymeric solutions with concentrations of 8%, 10%, and 12%. Each membrane was characterized from a morphological point of view by scanning electronic microscopy and from compositional point of view by thermal analyses. Hydrodunamic characteristics were also determined for all membranes using both ultrapure water and real municipal wastewater. Obtained results proved that polysulfone and cellulose acetate based membranes are potential candidates to be used for advanced treatment of municipal wastewater using photocatalytic membrane reactors.

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Comparative analysis of the processes of collagen concentration by ultrafiltration using different types of membranes

Cited by 6 publications

References 28 publications

Reactional Processes on Osmium–Polymeric Membranes for 5–Nitrobenzimidazole Reduction

Reactional Processes on Osmium–Polymeric Membranes for 5–Nitrobenzimidazole Reduction

Transport and Separation of the Silver Ion with n–decanol Liquid Membranes Based on 10–undecylenic Acid, 10–undecen–1–ol and Magnetic Nanoparticles

Polysulfone and cellulose acetate-based membranes' potential application to photocatalytic membrane reactors

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