Effect of the drying temperature on sulfonated polyether sulfone nanofiltration membranes prepared by a coating method / Yawei Yu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 427-435 Titre : Effect of the drying temperature on sulfonated polyether sulfone nanofiltration membranes prepared by a coating method Type de document : texte imprimé Auteurs : Yawei Yu, Auteur ; Shuhao Wang, Auteur ; Jun Shao, Auteur ; Yong Zhou, Auteur ; Congjie Gao, Auteur Année de publication : 2018 Article en page(s) : p. 427-435 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bains de teinture -- Epuration Eaux usées -- Recyclage Filtration Membranes (technologie) Nanofiltration Polyéthersulfones Index. décimale : 667.9 Revêtements et enduits Résumé : This study reports on the preparation of a novel sulfonated polyether sulfone nanofiltration membrane via a manual coating method. The as-prepared membrane was modified by changing the drying temperature and utilizing additives. As the drying temperature was increased, the rejection performance of the as-prepared nanofiltration membrane increased, while flux decreased. The nanofiltration membrane dried at 40°C had relatively high permeation flux and good rejection performance for divalent ions and dyes; therefore, it is suitable for dye wastewater treatment. The nanofiltration membrane dried at 50°C had relatively low permeation flux and relatively good rejection performance for inorganic salts. The pore size of the skin layer was reduced as the drying temperature was increased. The average diameters of the as-prepared nanofiltration membranes dried at 40 and 50°C were 5.08 and 1.51 nm, respectively. Due to excellent hydrophilicity and relatively low roughness, the as-prepared nanofiltration membranes dried at 40 and 50°C had superior antipollution characteristics. Note de contenu : - EXPERIMENT : Materials - Preparation of the nanofiltration membrane - Membrane characterization - Membrane performance based on aqueous dye solution - Membrane performance based on aqueous NaCl solution - Average pore size - Stokes radius of PEG - RESULTS AND DISCUSSION : Membrane performance based on NaCl aqueous solution - Membrane performance assessment using aqueous dye solution - Average pore size - Contact angle and XPS - SEM and AFM DOI : 10.1007/s11998-017-9999-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9999-1.pdf Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30301 [article]

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Improvement of the separation and antibiological fouling performance using layer-by-layer self-assembled nanofiltration membranes / Caihua Xiong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 731–746 Titre : Improvement of the separation and antibiological fouling performance using layer-by-layer self-assembled nanofiltration membranes Type de document : texte imprimé Auteurs : Caihua Xiong, Auteur ; Zhonghua Huang, Auteur ; Zhiyu Ouyang, Auteur ; Mengdi Tang, Auteur ; Xiaolu Lin, Auteur ; Zhen Zhang, Auteur Année de publication : 2020 Article en page(s) : p. 731–746 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argent Caractérisation Membranes (technologie) Nanofiltration Nanoparticules Polyéthylèneimine Revêtements antisalissures Séparation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : A novel surface-modified nanofiltration (NF) membrane was prepared by layer-by-layer (LbL) self-assembly of positively charged polyethylenimine (PEI) and glutaraldehyde (GA) and negatively charged carboxymethyl chitosan (NO-CMC) alternately on the polyethersulfone (PES) membrane surfaces. The alteration aimed at improving the membrane separation performance, which was investigated in the study. In order to enhance antibiological fouling performance of the NF membrane, the silver nanoparticles (AgNPs) were coated on the modified membrane in two different modes. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), zeta potential measurement, and water contact angle measurements were employed to characterize the formed membrane surface chemical composition and morphology. The rejection of different single nonheavy metal salts, yielded from the modified membrane, followed the order of MgCl2 > MgSO4 > CaCl2 > Na2CO3 > NaCl > Na2SO4. Additionally, the rejection of single heavy metal salts Cr3+, Cu2+, Cd2+, Ni2+ was 88.95%, 84.04%, 82.69% and 83.47%, respectively, whereas the rejection of Cr3+, Cu2+, Cd2+, Ni2+ increased to 91.77%, 90.70%, 89.74% and 87.22%, respectively, in the mixed salt solution. Moreover, the rejection of Cu2+ and Cd2+ increased to 96.12% and 94.38% after adjusting pH. As a result of loading the AgNPs on the modified membrane with a suitable mode, the antibiological fouling ability of the membrane was immensely improved by AgNPs. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of NO-CMC - Preparation of composite membranes - Characterization - Evaluation of membrane performance - Results and discussion - Characterization of the NO-CMC - Characterization of the prepared composite NF membranes - Evaluation of membrane performance DOI : https://doi.org/10.1007/s11998-019-00298-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00298-z Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34103 [article]

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NH4HCO3 as additive for fabrication of thin film nanocomposite membrane with enhanced permeability / Yanchun Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 413-421 Titre : NH4HCO3 as additive for fabrication of thin film nanocomposite membrane with enhanced permeability Type de document : texte imprimé Auteurs : Yanchun Li, Auteur ; Shilin Zhou, Auteur ; Jin He, Auteur ; Yuwen Lai, Auteur ; Wentao Yan, Auteur ; Yong Zhou, Auteur ; Congjie Gao, Auteur Année de publication : 2024 Article en page(s) : p. 413-421 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Couches minces Membranes (technologie) Moussants Nanobulles Nanofiltration Index. décimale : 667.9 Revêtements et enduits Résumé : During interfacial polymerization, the in situ growth of nanobubbles can exist between the support layer and the separation layer of the membrane, which changes the microstructure of the membrane and improves its performance. The incorporation of R812s SiO2 in the preparation of the mixed matrix nanofiltration membrane increases the surface interface pores, thereby improving the flux. In this study, NH4HCO3 foaming agent was introduced into the aqueous phase of the R812s SiO2 nanofiltration membrane to react with the byproduct HCl generated during the interface process, thus generating nanobubbles that exist between the support layer and the separation layer. The surface of the membrane was characterized by related instruments. It was found that the addition of NH4HCO3 generates a large number of nanobubbles, causing significant changes to the membrane surface, and resulting in increased protrusions and pore size, greatly improving membrane flux while slightly reducing the rejection of sodium sulfate. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Membrane preparation - Characterization of membranes - Testing of separation performances - RESULTS AND DISCUSSION : Influence of the NH 4 HCO 3 concentration - Optimization of reaction monomer - Optimization of TMC monomer - Optimization of PIP monomer - Table 1 : Specific preparation parameters of TFN membrane DOI : https://doi.org/10.1007/s11998-023-00834-y En ligne : https://drive.google.com/file/d/1fSntPfrbgUJxHftnPQaEUd-NYC_LC0hS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40462 [article]

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Waste not / Wolfram Scholz in LEATHER INTERNATIONAL, Vol. 219, N° 4873 (08/2017)  

[article]  inLEATHER INTERNATIONAL > Vol. 219, N° 4873 (08/2017) . - p. 30-31 Titre : Waste not Type de document : texte imprimé Auteurs : Wolfram Scholz, Auteur Année de publication : 2017 Article en page(s) : p. 30-31 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie -- Aspect de l'environnement Eaux usées -- Epuration Eaux usées -- Recyclage Nanofiltration Osmose inverse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The effluent produced by tanneries is a complex mixture of substances containing a high proportion of sodiums that needs to be treated according to regulations to meet strict discharge limits. The author examines the benefits of nanofiltration and reverse osmosis systems for recycling and cleaning tannery wastewater. Note de contenu : - Recycling process - RO and zero liquid discharge - Integrating nanofiltration En ligne : https://drive.google.com/file/d/19CSuhm08zqjquxLnZcHZYyxCk3TFwF6g/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28953 [article]

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