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RISS 인기검색어
- 검색키워드
- 저자 : Sirus Zinadini (검색결과 4 건)
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Mahya Samari,Sirus Zinadini,Ali Akbar Zinatizadeh,Mohammad Jafarzadeh,Foad Gholami 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.11
Surface-modified metal-organic frameworks (MOFs) were used for the fabrication of polyethersulfone (PES)- based polymeric composite membranes by phase inversion method. Initially, zirconium-based MOF, UiO-66-NH2, was modified with melamine (denoted as UiO-66-NH-Mlm) and ethylenediamine (UiO-66-NH-EtNH2) via a solvothermal post-modification technique. The fabricated polymeric membranes were then employed for oil-water separation and showed satisfactory hydrophilicity and antifouling performance (PWF: 55.38 kg/m2·h, FRR: 90.67 %, Rr: 46.94%, Rir: 9.33% and >99% rejection to the oil). It was due to the formation of the hydration layer, arising from the available -NH2 groups (providing hydrogen-bonding) on the surface of the modified MOFs (WCA: 51.66o), and the lower surface roughness. Higher hydrophilicity and better antifouling efficiency were obtained for the membranes using UiO-66- NH-Mlm, compared to UiO-66-NH-EtNH2, due to the higher number of -NH2 groups. The membranes also exhibited good thermal stability owing to the fine dispersion of the modified MOFs in the polymeric texture and the presence of metallic cores in the MOFs. The membranes were also applied for frequent filtrations with great performance.
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Soheil Dadari,Masoud Rahimi,Sirus Zinadini 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.9
This study used green synthesized nickel-alumina nanoparticles (NANPs) to fabricate antifouling, antibacterial,and high-performance polyethersulfone (PES) nanofiltration membranes for heavy metal ion removal. Scrophulariastriata extract was used to synthesize NANPs and to modify PES membranes. FT-IR, SEM, TEM, EDS, AFM,XRD, and zeta potential instrumental analyses were used to characterize NANPs and the membranes. The membraneporosity increased from 62.6% to 71.6-83.8%, and mean pore radius data exhibited a similar trend (from 4.47 to 7.54-12.55 nm). The water contact angle of the membranes was reduced from 64.1o to 57.3o-47.1o owing to functionalities ofNANPs, which improved membrane hydrophilicity and wettability. The prepared membrane water flux improved from20.38 to 44.11-78.34 kg/m2h. The results reveal the enhancement antifouling resistance parameters for the blendedmembranes due to NANPs functionalities hydrogen bonding, membranes surface negative charge, and the smoothersurface of the modified membranes, which AFM analysis proved. NANPs/PES membranes exhibited potent heavymetal ion removal and in the best case (0.5 wt% NANPs/PES membrane) the heavy metal rejection was Pb2+: 99.27%,Zn2+: 99.15%, Fe2+: 98.91%, and Cu2+: 98.58%. All the blended membranes showed effective antibacterial resistanceagainst Escherichia coli (35.8-93.17%) and Staphylococcus aureus (37.3-94.25%) due to the presence of nickel and functionalitiesof NANPs.
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A novel Ce-MOF/PES mixed matrix membrane; synthesis, characterization and antifouling evaluation
Farrokh Mohammadnezhad,Mostafa Feyzi,Sirus Zinadini 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.71 No.-
A new polyethersulfone (PES) nanofiltration membrane, modified with nanocrystalline Ce(III)metal–organic framework (MOF), was produced via the phase inversion method and characterizedusing scanning electron microscopy (SEM), atomic force microscopy (AFM), water contact angle andporosity measurements. The morphology and performance of these membranes were investigated interms of pure waterflux, water contact angle, fouling parameters and dye removal. Modified PESmembranes showed an increase in the pure waterflux relative to the bare membrane. The changes insublayer and skin layer of modified membranes and also increased pore size and porosity is obvious fromthe SEM images of PES membranes porosity measurements. Moreover, the surface hydrophilicity of theMOF embedded membranes was improved due to the tendency of water to the membrane surface. Theantifouling properties of the membranes were evaluated by powder milk solution and measuring thefluxrecovery ratio (FRR). The results revealed the modified membrane with 0.5 wt.% of MOF nanoparticle(NPs) had the best antifouling property and also the highest porosity and waterflux. Nanofiltrationperformance of membranes was appraised by probing of the retention of Direct Red 16. The resultshowed that all the modified membranes have a higher dye rejection capacity than the bare PESmembrane.
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Golshan Moradi,Rouhollah Heydari,Sirus Zinadini,Masoud Rahimi 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
A high-performance thin film composite (TFC) nanofiltration (NF) membrane was prepared by thefurosemide-modified chitosan (CS@FS) composite assisted pectin (PC) functionalization of the polyethersulfone(PES) NF membrane for antibiotic removal and pharmaceutical wastewater treatment. Analysesby Fourier transform infrared (FTIR) confirmed successful modification of CS. The effect of CS@FS-co-PCon physicochemical characteristics and separation performance of the prepared membrane was studied. The CS@FS-co-PC TFC membranes indicated a smoother surface with decreased water contact angle. Upon introduction of CS@FS-co-PC with 0.5 wt.% CS@FS on the membrane surface, the resultant TFCmembrane (TFC-0.5) achieved pure water flux (PWF) of 47.8 L/m2h, high flux recovery ratio (FRR) of94.2%, and irreversible fouling ratio (DRir) of 5.8%. All prepared TFC membranes showed more than91% rejection for both studied antibiotics. In the optimized conditions, ceftriaxone (CRO) and cefixime(CFM) rejections using TFC-0.5 membrane were 99.9 and 99.7%, respectively. Moreover, the CS@FS-co-PC TFC NF membranes show outstanding separation performance for pharmaceutical wastewater treatment(COD removal efficiency of 92.0%±1.1, TDS removal of 56.1 ± 1.0%, and complete turbidity removal). The present study aimed to prepare a TFC membrane that can indicate high antibiotic rejection and resistanceto fouling for pharmaceutical wastewater treatment applications.
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