Membrane materials with osmium nanoparticles have been recently reported for bulk membranes and supported composite membrane systems. In the present paper, a catalytic material based on dispersed in n-decanol (nD) or n-dodecanol (nDD) is presented, which also works as an emulsion membrane. The hydrogenation of p-nitrophenol (PNP) carried out reaction separation column acid-receiving phase nanodispersion n-alcohols. variables PNP conversion process p-aminophenol (PAP) transport are follows:...

Composite membranes play a very important role in the separation, concentration, and purification processes, but especially membrane reactors bioreactors. The development of composite has gained momentum through involvement various nanoparticles, polymeric, oxide, or metal, that have contributed to increasing their reactivity selectivity. This paper presents preparation characterization an active metal nanoparticle-support polymer type membrane, based on osmium nanoparticles obtained situ...

Melatonin is the hormone that focuses attention of researchers in medical, pharmaceutical, materials, and membranes fields due to its multiple biomedical implications. The variety techniques methods for controlled release melatonin linked multitude applications, among which sports medicine occupies a special place. This paper presents preparation characterization composite based on chitosan (Chi) sulfonated ethylene-propylene-diene terpolymer (sEPDM). were obtained by vacuum evaporation from...

Materials based on platinum metals with very good catalytic activity were tested in the reduction of p–nitrophenol (pNP) to p–aminophenol (pAP). The majority presented materials are adsorption surface catalyst simultaneously molecular hydrogen, coming from sodium borohydride an aqueous medium, which reduces it. In present paper, a material osmium dispersed n–decanol or n–dodecanol is presented, also works as emulsion membrane, for absorption and hydrogen at n–alcohol solution interface....

Liquid membranes based on nanoparticles follow a continuous development, both from obtaining methods and characterization of techniques points view. Lately, osmium have been deposited either flat membranes, with the aim initiating some reaction processes, or hollow fiber increasing contact surface phases membrane system. This paper presents obtainment liquid (Os-NP) dispersed in ndecanol (nDol) for realization system large between phases, but without using support. The dispersion n-decanol...

The recovery of osmium from residual tetroxide (OsO4) is a necessity imposed by its high toxicity, but also the technical-economic value metallic osmium. An elegant and extremely useful method as membrane catalytic material, in form nanoparticles obtained on polymeric support. subject present study realization composite which matrix polypropylene hollow fiber, active component consists reducing an alcoholic solution tetroxides directly support based use 10-undecenoic acid (10-undecylenic...

This paper presents the preparation and characterization of composite membranes based on chitosan (Chi), sulfonated ethylene-propylene-diene terpolymer (sEPDM), polypropylene (PPy), designed to capture hydrogen sulfide. The Chi/sEPDM/PPy were prepared through controlled evaporation a toluene dispersion layer Chi:sEPDM 1;1, w/w, deposited by immersion under slight vacuum (100 mmHg) PPy hollow fiber support. characterized morphologically, structurally, thermally, but also from point view their...

Although a slightly radioactive element, thorium is considered very toxic because its various species, which reach the environment, can constitute an important problem for health of population. The present paper aims to expand possibilities using membrane processes in removal, recovery and recycling from industrial residues reaching municipal waste processing platforms. includes short introduction on interest shown this weak metal, followed by highlighting some common (domestic) uses. In...

Hydrogen sulfide is present in active or extinct volcanic areas (mofettas). The habitable premises these are affected by the presence of hydrogen sulfide, which, even low concentrations, gives off a bad to unbearable smell. If living spaces considered closed enclosures, then system can be designed reduce concentration sulfide. This paper presents membrane way acceptable limits using cellulosic derivative-propylene hollow fiber based composite module. derivatives were...

This paper presents a transport and recovery of silver ions through bulk liquid membranes based on n-decanol using as carriers 10-undecylenic acid 10-undecylenyl alcohol. The across has been studied in the presence two types magnetic oxide nanoparticles obtained by electrochemical method with iron electrodes electrolyte without ions, which act promoters turbulence membrane. Separation alcohol were performed comparison lead ions. configuration separation module specially designed for chosen...

Liquid membranes usually have three main constructive variants: bulk liquid (BLM), supported (SLM) and emulsion (ELM). Designing hybrid variants is very topical, with the purpose of increasing flow substance through membrane but also improving selectivity. This paper presents operational limits some kind constituted as a which works by dispersing aqueous source (SP) receiving (RP) phases, itself being dispersion nanoparticles in an organic solvent (NP-OSM). The approached parameters were...

The bio-medical benefits of silver ions and 10-undecenoic acid in various chemical-pharmaceutical preparations are indisputable, thus justifying numerous research studies on delayed and/or controlled release. This paper presents the effect polymer matrix simultaneous release an aqueous medium pH ionic strength. study took into consideration polymeric matrices consisting cellulose acetate (CA) polysulfone (PSf), which were impregnated with oxide nanoparticles containing acid. studied iron...

Membranes are associated with the efficient processes of separation, concentration and purification, but a very important aspect them is realization reaction process simultaneously separation process. From practical point view, chemical reactions have been introduced in most membrane systems: on-liquid membranes, inorganic membranes or polymeric and/or composite membranes. This paper presents obtaining containing metallic osmium obtained situ. Cellulose acetate (CA), polysulfone (PSf)...

Regardless of the type liquid membrane (LM) (Bulk Liquid Membranes (BLM), Supported (SLM) or Emulsion (ELM)), transport and separation chemical species are conditioned by operational (OP) constructive design parameters (DP) permeation module. In present study, pH aqueous source phase (SP) receiving (RP) proposed system were selected as parameters. The mode contacting phases was chosen convective generator. experiments used BLM-type membranes with spheres in free rotation film contact...

The development of new composite membranes is required to separate chemical species from aggressive environments without using corrective reagents. One such case represented by the high hydrochloric acid mixture (very low pH and pCl) that contains mixed metal ions, or copper, cadmium, zinc lead ions in a binary (Cu-Zn Cd-Pb) quaternary mixture. This paper presents obtaining membrane chitosan (Chi)-sulfonated poly (ether ether ketone) (sPEEK)-polypropylene hollow fiber (Chi/sPEEK/PPHF) its...

Hydrogen sulfide is present in active or extinct volcanic areas (mofettas). The habitable premises these are affected by the presence of hydrogen sulfide, which, even low concentrations, gives off a bad to unbearable smell. If living spaces considered closed enclosures, then system can be designed reduce concentration sulfide. This paper presents membrane-based way acceptable limits using cellulosic derivative–propylene hollow fiber-based composite membrane module. derivatives were:...

Thorium is a weak radioactive element, but the control of its concentration in natural aqueous systems great interest for health, because it toxic heavy metal. The present paper presents recovery thorium from diluted synthetic by nanofiltration. membranes used nanofiltration containing species are composites 4′-Aminobenzo-15-crown-5 ether (ABCE) and sulfonated poly–ether–ether–ketone (sPEEK). composite (ABCE–sPEEK) were characterized scanning...

Thorium is a weak radioactive element, but the control of its concentration in natural aqueous systems great interest for health, because it toxic heavy metal. The present paper presents recovery thorium from diluted synthetic by nanofiltration. membranes used nanofiltration containing species are composites 4′-Aminobenzo-15-crown-5 ether (ABCE) and sulfonated poly–etherether–ketone (sPEEK). composite (ABCE–sPEEK) were characterized scanning electron microscopy (SEM), energy-dispersive X–Ray...

Azo ligand 11-(4-methoxyphenyl azo)-6-oxo-5,6-dihydro-benzo[4,5] imidazo[1,2-c] quinazoline-9-carboixylic acid was derived from 4-methoxyaniline and 6-oxo-5,6-dihydro-benzo[4,5]imidazo[1,2-c]quinazoline-9-carboxylic acid. The presence of azo dye identified by elemental analysis spectroscopic methods (FT-IR UV-Vis). compounds formed have been using atomic absorption in flame, FT.IR, UV-Vis spectrometry magnetic susceptibility conductivity. In order to evaluate the antibacterial efficiency its...

The experiments carried out in this paper tested the effectiveness of polysulfone-dimethyldioctodecylammonium bromide (PSU-DMOA) and polysulfone-Tween 80 dead-end facilities.The efficiency these membranes has been proved by determining permeate flow retention coefficient.Analyzing experimental data, it was found that for composite membrane rate is higher than membrane, t values being obtained highest pressure used system.