Peroxopolyoxometalate nanoparticles blended <scp>PES</scp> membrane with improved hydrophilicity, anti‐fouling, permeability, and dye separation properties

Barzegar, Hossein; Shahsavarifar, Samaneh; Vatanpour, Vahid; Masteri‐Farahani, Majid

doi:10.1002/app.50764

Cited by 13 publications

(2 citation statements)

References 64 publications

(58 reference statements)

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“…Reducing membrane fouling is a challenge that is being studied currently. Thus, some authors have achieved the improvement of the anti-fouling properties of PES membranes by their modification with different types of nanoparticles [19][20][21]. The fabrication or modification of commercial membranes, specifically for application to tanneries, will be of great importance in the near future.…”

Section: Introductionmentioning

confidence: 99%

Application of Nanofiltration and Reverse Osmosis Membranes for Tannery Wastewater Reuse

Fernández-Medrano

Cuartas-Uribe

Bes-Piá

et al. 2022

Water

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Tanneries produce large amounts of wastewater with high concentrations of suspended solids, organic matter, and salts. Treatment and reuse of these effluents are of great importance to preserve water resources and save costs. Although suspended solids and high percentages of organic matter can be eliminated by physico-chemical and biological processes, refractory chemical oxygen demand (COD) and salts will remain in the wastewater after these processes. In particular, chloride and sulphate ion concentrations may hinder the treated wastewater from being reused or even discharged according to legal standards. In this work, two nanofiltration membranes and two reverse osmosis membranes are tested to assess these technologies as regeneration processes for biologically treated tannery wastewater. Permeate flux and rejection of organic matter and ions were measured at different operating conditions (transmembrane pressure and cross-flow velocities) at both total recycle and concentration modes. Results showed that the difference between permeate fluxes of nanofiltration (NF) membranes and reverse osmosis (RO) membranes was very high. Thus, at 20 bar and 1.77 m·s−1, the permeate flux of the two tested NF membranes in the total recycle mode experiments were 106 and 67 L·m−2·h−1, while the obtained permeate fluxes for the RO membranes were 25 and 18 L·m−2·h−1. Concerning rejections, RO membranes rejected almost 100% of the salts, whereas NF membranes reduced their rejection when faced with increasing concentration factors (salt rejection between 50–60% at the highest concentration factor). In addition, the fouling of RO membranes was lower than that of NF membranes, recovering more than 90% of initial permeability by only water rinsing. In contrast, chemical cleaning was necessary to increase the permeability recovery of the NF membranes above 90%. The considerably lower rejections and the higher membrane fouling of the NF membranes lead us to conclude that reverse osmosis could be the most feasible technique for water reuse in the tannery industry, though the permeate fluxes are lower than those achieved with NF membranes.

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Section: Introductionmentioning

confidence: 99%

Application of Nanofiltration and Reverse Osmosis Membranes for Tannery Wastewater Reuse

Fernández-Medrano

Cuartas-Uribe

Bes-Piá

et al. 2022

Water

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“…Modification of silicone rubbers with hydrophobic zeolites [ 26 ] and microporous metal-organic frameworks [ 27 , 35 ] leads to an increase in the tortuosity of the diffusion path of water, which is expressed in an increase in organic components flux through the membrane and increase in the organic/water separation factor. The addition of polyoxometalates and carbon-based nanomaterials leads to an increase in the separation characteristics of the membranes [ 36 , 37 , 38 ]. Loading with fullerenols (content in the membrane is 5 wt%) makes it possible to increase the permeate flux, selectivity and mechanical properties in the pervaporation separation of water-alcohol mixtures, compared to unmodified membranes [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

High Efficiency Membranes Based on PTMSP and Hyper-Crosslinked Polystyrene for Toxic Volatile Compounds Removal from Wastewater

et al. 2022

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For the first time, membranes based on poly(1-trimethylsilyl-1-propyne) (PTMSP) with 5–50 wt% loading of hyper-crosslinked polystyrene sorbent particles (HCPS) were obtained; the membranes were investigated for the problem of effective removal of volatile organic compounds from aqueous solutions using vacuum pervaporation. The industrial HCPS sorbent Purolite Macronet™ MN200 was chosen due to its high sorption capacity for organic solvents. It has been found that the membranes are asymmetric when HCPS content is higher than 30 wt%; scanning electron microscopy of the cross-sections the membranes demonstrate that they have a clearly defined thin layer, consisting mainly of PTMSP, and a thick porous layer, consisting mainly of HCPS. The transport and separation characteristics of PTMSP membranes with different HCPS loading were studied during the pervaporation separation of binary and multicomponent mixtures of water with benzene, toluene and xylene. It was shown that the addition of HCPS up to 30 wt% not only increases the permeate fluxes by 4–7 times, but at the same time leads to 1.5–2 fold increase in the separation factor. It was possible to obtain separation factors exceeding 1000 for all studied mixtures at high permeate fluxes (0.5–1 kg/m2∙h) in pervaporation separation of binary solutions.

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A melamine‐based covalent organic framework nanomaterial as a nanofiller in polyethersulfone mixed matrix membranes to improve separation and antifouling performance

Vatanpour

Paziresh

2021

J of Applied Polymer Sci

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This research reported developing a polyethersulfone (PES) membrane using covalent organic frameworks (COFs) nanoparticle with a mean dimension of 30 nm. The SNW‐1 (Schiff‐based network) COF was synthesized using precursors of melamine and terephthalic acid and then characterized by XRD, SEM, TEM, and FTIR analyses. The influence of different loadings of the COF was evaluated on the permeability, antifouling behavior and dye/salt rejection. The addition of SNW‐1 caused a reduction in surface roughness and an improvement in hydrophilicity of the nanocomposite membranes, which improved their flux and fouling resistance considerably. The improvement of water flux, 2.6 times, was observed by adding 0.5 wt% COF to the membrane matrix. The 0.5 wt% COF membrane presented the best water permeability, 38.9 L/m2 h bar BSA solution flux, dye rejection of 98.7% for Reactive Green 19 and 62.6% for Reactive yellow 39, 52.9% Na2SO4 and 24.5% NaCl salt rejections. Zeta potential and salt rejection trend indicated a negative surface charge on the nanocomposite membrane. Fouling experiments by BSA protein solution exhibited that the FRR reached 88.9% for 2 wt% COF membrane. Thus, employing SNW‐1 into PES matrix resulted in a promising nanofiltration membrane for dye separation and moderate salt separation with suitable antifouling properties.

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Peroxopolyoxometalate nanoparticles blended PES membrane with improved hydrophilicity, anti‐fouling, permeability, and dye separation properties

Cited by 13 publications

References 64 publications

Application of Nanofiltration and Reverse Osmosis Membranes for Tannery Wastewater Reuse

Application of Nanofiltration and Reverse Osmosis Membranes for Tannery Wastewater Reuse

High Efficiency Membranes Based on PTMSP and Hyper-Crosslinked Polystyrene for Toxic Volatile Compounds Removal from Wastewater

A melamine‐based covalent organic framework nanomaterial as a nanofiller in polyethersulfone mixed matrix membranes to improve separation and antifouling performance

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