Selective permeation of Ag+ ions from pyrosulfite solution through Nano-Emulsion Liquid Membrane (NELM) containing CYANEX 925 as carrier

Masry, B. A.; Aly, M. I.; Daoud, J. A.

doi:10.1016/j.colsurfa.2020.125713

Cited by 26 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The investigations of desorption procedures was carried out by loaded 100 mg/L of Zn, Co, Ni and Mn on PVP-AA hydrogel adsorbent using different desorption agents such as distilled water, nitric acid, sodium sulfate and oxalic acid at radiation dose =30 kGy, V/m=0.05 L/g and pH=3 to find a suitable desorption agent. The desorption efficiency (D %) was estimated using the subsequent equation [27] :…”

Section: Desorption and Regeneration Investigationmentioning

confidence: 99%

“…Desorption and Regeneration investigationThe investigations of desorption procedures was carried out by loaded 100 mg/L of Zn, Co, Ni and Mn on PVP-AA hydrogel adsorbent using different desorption agents such as distilled water, nitric acid, sodium sulfate and oxalic acid at radiation dose =30 kGy, V/m=0.05 L/g and pH=3 to find a suitable desorption agent. The desorption efficiency (D %) was estimated using the subsequent equation[27] :WhereCa and Cd are the concentration of ions adsorbed and desorbed (mg/L), The tabulated data in table (4) show that maximum stripping efficiency for Co, Ni of 99% was achieved with 1 M nitric acid (2 stages), as well as 99% and 35% for Mn and Zn were achieved with 5 M oxalic acid (3 stages). On other hand the regenerated PVP-AA adsorbent (using nitric and oxalic acids) was implanted to second sorption process with the same batch optimum conditions (PVP-AA at radiation dose=30 kGy, V/m=0.05 L/g and pH=3, contact time=45 min).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Fabrication of A novel polyvinylpyrrolidone/abeitic acid hydrogel by gamma irradiation for the recovery of Zn, Co, Mn and Ni from aqueous acidic solution

Masry¹,

Elhady²,

Mousaa³

2021

Preprint

View full text Add to dashboard Cite

As heavy metals are a group of pollutants that originate from industrial and nuclear facilities has become of major concern in the aquatic environment due to their toxicity to all living organisms. In this context; this study was aimed to prepare sustainable and efficient hydrogel for the removal of heavy metals such as Co, Ni, Zn and Mn from aqueous acidic solution. The polyvinylpyrrolidone (PVP)/abietic acid (AA) hydrogel were prepared by gamma irradiation at 50 kGy. The characterization of PVP/AA hydrogel were investigated by water absorbancy, gel content, scanning electron microscopy, X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The characterizations indicate that bio-sorbent composite hydrogel networks provide advantageous over conventional preparation techniques. PVP/AA hydrogel was implanted for batch process with studying the effect different parameters on the sorption of the investigated metal ions such as radiation dose; pH, contact time, metal ions, V/m and temperature. The results illustrate that the highest uptake% was obtained at radiation dose 30 kGy at optimum pH = 3. The maximum adsorption capacity of PVP-AA adsorbent was reached 32, 32.5,19 and 32.5 mg.g− 1 for Zn(II), Co(III), Ni (III) and Mn(II) ions respectively. The changes in the values of free energy (ΔG) and enthalpy (ΔH) confirm the spontaneous nature of the adsorption reaction with an endothermic process. The maximum desorption of the investigated metal ions was achieved with 1 M HNO3 of (97%, 98%, 70% and 60%) and takes the order: Co > Ni > Zn > Mn. The highest separation factor for Zn/Co = 26 and Zn/Ni = 8.6 at pH = 0.75.

show abstract

Section: Desorption and Regeneration Investigationmentioning

confidence: 99%

mentioning

confidence: 99%

Fabrication of A novel polyvinylpyrrolidone/abeitic acid hydrogel by gamma irradiation for the recovery of Zn, Co, Mn and Ni from aqueous acidic solution

Masry¹,

Elhady²,

Mousaa³

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Liquid membranes represent a constantly expanding field of research for both analytical and applied separatology, justified by the excellent performance in selectivity [1,2], separation efficiency [3,4] and technical-economic accessibility [5,6]. This is because a liquid membrane is generally any barrier of a liquid nature (homogeneous or heterogeneous, hydrophilic or hydrophobic or emulsified or deposited on supports) interposed between two fluids, with the ability to selectively block the passage from one fluid to another of some or several components [7,8].…”

Section: Introductionmentioning

confidence: 99%

Operational Limits of the Bulk Hybrid Liquid Membranes Based on Dispersion Systems

et al. 2022

View full text Add to dashboard Cite

Liquid membranes usually have three main constructive variants: bulk liquid membranes (BLM), supported liquid membranes (SLM) and emulsion liquid membranes (ELM). Designing hybrid variants is very topical, with the main purpose of increasing the flow of substance through the membrane but also of improving the selectivity. This paper presents the operational limits of some kind of hybrid membrane constituted as a bulk liquid membrane (BLM), but which works by dispersing the aqueous source (SP) and receiving (RP) phases, with the membrane itself being a dispersion of nanoparticles in an organic solvent (NP–OSM). The approached operational parameters were the volume of phases of the hybrid membrane system, the thickness of the liquid membrane, the working temperature, the flow of aqueous phases, the droplet size of the aqueous phases dispersed across the membrane, the nature and concentration of nanoparticles in the membrane, the pH difference between the aqueous phases, the nature of the organic solvent, the salt concentration in the aqueous phases and the nature of transported chemical species. For this study, silver ion (SI) and p-nitrophenol (PNP) were chosen as transportable chemical species, the n-aliphatic alcohols (C6…C12) as membrane organic solvents, 10–undecenoic acid (UDAc) and 10-undecylenic alcohol (UDAl) as carriers and magnetic iron oxides as nanoparticles dispersed in the membrane phase. Under the experimentally established operating conditions, separation efficiencies of over 90% were obtained for both ionic and molecular chemical species (silver ions and p-nitrophenol). The results showed the possibility of increasing the flow of transported chemical species by almost 10 times for the silver ion and approximately 100 times for p-nitrophenol, through the appropriate choice of operational parameters, but they also exposed their limits in relation to the stability of the membrane system.

show abstract

“…Liquid membrane separations (bulk [ 1 , 2 , 3 ], supported [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ], emulsion [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]) combining extraction and stripping processes in a single mass-transfer unit allow the separation of species on their partition between two aqueous phases. Mass transfer occurs through an intermediate organic phase (mass-transfer medium).…”

Section: Introductionmentioning

confidence: 99%

Three- and Multi-Phase Extraction as a Tool for the Implementation of Liquid Membrane Separation Methods in Practice

2022

View full text Add to dashboard Cite

To promote the implementation of liquid membrane separations in industry, we have previously proposed extraction methods called three- and multi-phase extraction. The three-phase multi-stage extraction is carried out in a cascade of bulk liquid membrane separation stages, each comprising two interconnected (extraction and stripping) chambers. The organic liquid membrane phase recycles between the chambers within the same stage. In multi-phase extraction, each separation stage includes a scrubbing chamber, located between the extraction and stripping chambers. The three- and multi-phase multi-stage extraction technique can be realized either in a series of mixer–settler extractors or in special two- or multi-chamber extraction apparatuses, in which the convective circulation of continuous membrane phase between the chambers takes place due to the difference in emulsion density in the chambers. The results of an experimental study of the extraction of phenol from sulfuric acid solutions in the three-phase extractors with convective circulation of continuous membrane phase are presented. Butyl acetate was used as an extractant. The stripping of phenol from the organic phase was carried out with 5–12% NaOH aqueous solutions. The prospects of using three-phase extractors for wastewater treatment from phenol are shown. An increase in the efficiency of three-phase extraction can be achieved by carrying out the process in a cascade of three-phase apparatuses.

show abstract

Selective permeation of Ag+ ions from pyrosulfite solution through Nano-Emulsion Liquid Membrane (NELM) containing CYANEX 925 as carrier

Cited by 26 publications

References 30 publications

Fabrication of A novel polyvinylpyrrolidone/abeitic acid hydrogel by gamma irradiation for the recovery of Zn, Co, Mn and Ni from aqueous acidic solution

Fabrication of A novel polyvinylpyrrolidone/abeitic acid hydrogel by gamma irradiation for the recovery of Zn, Co, Mn and Ni from aqueous acidic solution

Operational Limits of the Bulk Hybrid Liquid Membranes Based on Dispersion Systems

Three- and Multi-Phase Extraction as a Tool for the Implementation of Liquid Membrane Separation Methods in Practice

Contact Info

Product

Resources

About