Separation of copper ions from iron ions using PVA-g-(acrylic acid/N-vinyl imidazole) membranes prepared by radiation-induced grafting

Ajji, Z.; Ali, Ali M.

doi:10.1016/j.jhazmat.2009.08.049

Cited by 59 publications

(31 citation statements)

References 20 publications

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“…Comparing to other methods, membrane technology offers a unique solution to treat heavy metal contaminated wastewater with advantages of cost effective, high removal efficiency, small footprint and environmental friendly [5][6][7]. Nanofiltration (NF) is a membrane filtration process with a membrane pore size in the sub-nano scale [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Green modification of outer selective P84 nanofiltration (NF) hollow fiber membranes for cadmium removal

Gao

Sun

Zhu

et al. 2016

Journal of Membrane Science

116

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Outer-selective thin-film composite (TFC) hollow fiber membranes are normally made from interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC).However, the removal of excess MPD solution and the large consumption of alkane solvents are their technical bottlenecks. In this study, green methods to prepare the outer selective TFC hollow fiber membranes were explored by firstly modifying the membrane substrate with polyethyleneimine (PEI) and then by water soluble small molecules such as glutaraldehyde (GA) and epichlorohydrin (ECH). Using P84 polyimide as the substrate, not only do these modifications decrease substrate's pore size, but also vary surface charge by making the membranes less positively charged. As a result, the resultant membranes have higher rejections against salts such as Na 2 SO 4 , NaCl and MgSO 4 . The PEI and then GA modified membrane has the best separation performance with a NaCl rejection over 90 % and a pure water permeability (PWP) of 1.74 ± 0.01 Lm −2 bar −1 h −1 . It also shows an impressive rejection to CdCl 2 (94 %) during long-term stability tests. The CdCl 2 rejection remains higher than 90% at operating temperatures from 5 to 60 °C. This study may provide useful insights for green manufacturing of outer-selective nanofiltration (NF) hollow fiber membranes.

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Section: Introductionmentioning

confidence: 99%

Green modification of outer selective P84 nanofiltration (NF) hollow fiber membranes for cadmium removal

Gao

Sun

Zhu

et al. 2016

Journal of Membrane Science

116

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“…These membranes have a highly hydrophilic nature, which is considered as an advantage for some applications, but in most cases it becomes a hindrance due to the high swelling capacity of the membranes in water. To enhance the stability and performance of PVA-based membranes, a variety of chemical modifications have been employed, e.g., cross-linking [5][6][7], electrospinning [8][9][10], blending [11], sol-gel process [12,13], and grafting [14,15].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

et al. 2015

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We prepared poly(vinyl alcohol) (PVA)/SiO 2 and PVA/SiO 2 /glutaraldehyde (GA) nanocomposite membranes in a single step using the solution casting method. The structure, morphology, and properties of these nanocomposite membranes were characterized by Raman spectroscopy, atomic force microscopy, small-and wideangle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis (DMA). The influence of silica and GA loading on the meso-scale characteristics of the composite membranes was investigated. The results showed that silica deposited in the form of small nanoparticles (*1 nm) in the PVA/ SiO 2 membranes, while bigger submicron particles ([25 nm) were formed in the PVA/SiO 2 /GA membranes. The water uptake of the PVA/SiO 2 membranes increased with temperature, but the PVA/SiO 2 /GA membranes were completely dissolved above 50°C. We can therefore conclude that the addition of GA deteriorated the properties of PVA/SiO 2 membranes. The thermal stability of the PVA/ SiO 2 membranes increased with the increasing silica loading with a maximum char yield of 46 % for PVA/SiO 2 / 4T. Even DMA profiles indicated a promising increase in E R (rubbery modulus) from 6 MPa (PVA membrane) to 1015 MPa (PVA/SiO 2 /4T) at 250°C, showing high mechanical strength of these membranes.

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“…Recently, imidazole and its derivatives, have also been useful for the purpose in the solvent extraction of such metals as Co(II), Ni(II), Cu(II), Zn(II), Fe(III), and Cd(II) (3,4,11,(13)(14)(15)(16). Moreover, several works on their application in the (II), Co(II), and Ni(II)) from chloride and nitrate solution across the polymer inclusion membrane doped with 1-alkylimidazoles.…”

Section: Introductionmentioning

confidence: 99%

Application of Polymer and Supported Membranes with 1-Decyl-4-Methylimidazole for Pertraction of Transition Metal Ions

Ulewicz

Radzyminska-Lenarcik

2014

Separation Science and Technology

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The facilitated transport of Zn(II), Cd(II), Co(II), and Ni(II) ions from different aqueous chloride source phases (c Me = 0.001 mol/dm 3 , pH = 6.0) across supported (SLMs) and polymer inclusion membranes (PIMs) doped with 1-decyl-4-methylimidazole as ion carrier was reported. The membrane is characterized by means of atomic force microscopy (AFM). The results show that Zn(II) can be separated very effectively from other transition metal cations as Cd(II), Co(II), and Ni(II) from different equimolar mixtures of such ions. The higher initial fluxes for Zn(II) were found for PIM (3.62-4.10 µmol/m 2 .s), while the lower values were observed for SLM. However, after taking into account the morphology (porosity, tortuosity) of the membranes, the values of the initial flux of Zn(II) transport across the PIM are lower than those across the SLM. The recovery factor of Zn(II) ions during transport across PIM and SLM from different mixtures of cations is above 95% after 24 hrs. PIM containing 1-decyl-4-methylimidazole are stable for 120 hrs.Keywords polymer inclusion membrane (PIM); supported liquid membrane (SLM); separation of metal ions; imidazole derivatives INTRODUCTIONSupported liquid membranes (SLM) and polymer inclusion membranes (PIM) represent an attractive liquid-to-liquid extraction for the selective removal and concentration of nonferrous metal ions (Zn(II), Co(II), Ni(II), Cd(II), Cu(II), and Pb(II)) from aqueous solutions. The transport of such metal ions across SLM and PIM can be described as the simultaneous extraction and back-extraction operations combined in

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Separation of copper ions from iron ions using PVA-g-(acrylic acid/N-vinyl imidazole) membranes prepared by radiation-induced grafting

Cited by 59 publications

References 20 publications

Green modification of outer selective P84 nanofiltration (NF) hollow fiber membranes for cadmium removal

Green modification of outer selective P84 nanofiltration (NF) hollow fiber membranes for cadmium removal

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Application of Polymer and Supported Membranes with 1-Decyl-4-Methylimidazole for Pertraction of Transition Metal Ions

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