Polymer binding/ultrafiltration as a method for concentration and separation of metals

Volchek, Konstantin; Krentsel, E.; Yu, Zhilin; Shtereva, G.; Dytnersky, Yu. I.

doi:10.1016/0376-7388(93)85120-l

Cited by 95 publications

(66 citation statements)

References 14 publications

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“…From these waste streams heavy metals such as Cr(VI), Cr (III), Cu(II), Zn(II), etc., could be separated and concentrated through binding of the target metal ions to water soluble polyelectrolyte and subsequent ultrafiltration of the bound metals from the unbound components [10,11]. Below we investigate the removal of metal ions from aqueous solutions by complexation-ultrafiltration and PES UF membranes are used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Effect of solvents on performance of polyethersulfone ultrafiltration membranes: Investigation of metal ion separations

2011

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Citation: ARTHANAREESWARAN, G. and STAROV, V., 2010 ABSTRACTThe new polyethersulfone (PES) based ultrafiltration membranes were formed using two stage process of dry and wet phase inversion in non solvent coagulation bath. The effects of three different solvents such as, N-N dimethylformamide (DMF) , N-methyl-2-pyrrolidone (NMP) and Dimethyl sulphoxide (DMSO) of 82.5% and 85% concentrations on the performance of final membranes were extensively investigated. Experimental results proved that PES ultrafiltration membranes with an asymmetric structure were successfully formed which was confirmed by scanning electron microscopy (SEM). The number of pores formed on the top layer of PES membranes using above-mentioned three solvents was the result of the combined effect of the thermodynamic properties of the system (composition, concentrations, phase behaviour) and membrane formation kinetics, whereas, the formation of the macroporous sub layer of those membranes was controlled by the diffusion rate of solvent-nonsolvent. The flux of pure water, membrane resistance, mechanical stability and separation performance of the PES membranes can be varied using different PES concentrations. Separation of metal ions from aqueous solutions was studied for Ni (II), Cu (II) and Cr (III) using two complexing polymer ligands:Polyvinyl alcohol (PVA) and poly(diallyldimethylammonium chloride) (PDDA).The separation and permeate rate (flux) efficiencies of the new membranes are compared using different solvents and different PES/solvents compositions.

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Section: Introductionmentioning

confidence: 99%

Effect of solvents on performance of polyethersulfone ultrafiltration membranes: Investigation of metal ion separations

2011

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“…Controlling the reactivity of the system is indeed not obvious in polymeric systems. For instance with VBAC, a cationic polymer, Ni 2+ was unexpectedly extracted due to remaining non-quaternary alkylated amino functions [22].…”

Section: Ultrafiltrationmentioning

confidence: 99%

Metal ion extraction in microheterogeneous systems

Hébrant

2009

Coordination Chemistry Reviews

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“…Th e method was used for contaminants removal such as metal or endocrine disrupters or pharmaceuticals. Th e polymers widely used for metal removal include weakly basic, cationic chitosan, poly(ethylenimine) and poly(diallyl dimethylammonium chloride) [85]. Cationic or anionic surfactants in form of micelles are used for the removal of inorganic pollutants.…”

Section: Functionalized Particles-loaded Membranes For Selective Sepamentioning

confidence: 99%

Molecular Recognition‐Driven Membrane Processes

Donato¹,

Mazzei²,

Algieri³

et al. 2014

Smart Membranes and Sensors

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High-precision, selective and effi cient systems are strongly demanded in all productive sectors, including chemical manufacturing, pharmaceutical, medical treatment, food, energy, diagnostic, analytical tools. Precision separation, conversion, formulation at molecular level may rely on various mechanisms and properties, such as molecular sieving, electrical charge, chemical solubility, molecular recognition. Membrane operation can promote mass transport, separation, conversion, formulation on the basis of the mentioned mechanisms. Biomimic and biohybrid funtionalised membranes are particularly suitable for separations based on molecular recognition.Membranes can be formed by polymers or monolythes bearing the (biomimic) recognition sites. In alternative, biomimic, biomolecules and recognition sites can be loaded on a previously formed membrane support. In such cases, surface functionalization methods can improve the loading effi ciency. Molecularly imprinted membranes; membranes bearing affi nity ligands (Antigen-Antibody, avidin/-ligand, DNA-protein, sugar-lectin, RNA-ribosome,…); membranes functionalized with zeolite and nanoparticles; membranes with immobilized enantioselective enzyme for kinetic resolutions, are among examples of selective and effi cient operations driven by molecular recognition. Th is is the mechanism by means of which molecules are able to identify each other using non-covalent -(hydrogen bonding, metal coordination, hydrophobic forces, van der Waals forces, π-π interactions and electrostatic eff ects) and covalent interactions.

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Polymer binding/ultrafiltration as a method for concentration and separation of metals

Cited by 95 publications

References 14 publications

Effect of solvents on performance of polyethersulfone ultrafiltration membranes: Investigation of metal ion separations

Effect of solvents on performance of polyethersulfone ultrafiltration membranes: Investigation of metal ion separations

Metal ion extraction in microheterogeneous systems

Molecular Recognition‐Driven Membrane Processes

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