Effect of NaA zeolite particle addition on poly(phthalazinone ether sulfone ketone) composite ultrafiltration (UF) membrane performance

In this study, novel <a>mixed matrix polyethersulfone (PES) membranes</a> were synthesized by using two different kinds of metal organic frameworks (MOFs), namely UiO-66 and UiO-66-NH2. The composite membranes were characterised by SEM, EDX, FTIR, PXRD, water contact angle, porosity, pore size, etc. Membrane performance was investigated by water permeation flux, flux recovery ratio, fouling resistance and anti-fouling performance. The stability test was also conducted for the prepared mixed matrix membranes. A higher reduction in the water contact angle was observed after adding both MOFs to the PES and sulfonated PES membranes compared to pristine PES membranes. An enhancement in membrane performance was observed by embedding the MOF into PES membrane matrix, which may be attributed to the super-hydrophilic porous structure of UiO-66-NH2 nanoparticles and hydrophilic structure of UiO-66 nanoparticles that could accelerate the exchange rate between solvent and non-solvent during the phase inversion process. By adding the MOFs into PES matrix, the flux recovery ratio was increased greatly (more than 99% for most mixed matrix membranes). The mixed matrix membranes showed higher resistance to protein adsorption compared to pristine PES membranes. After immersing the membranes in water for 3 months, 6 months and 12 months, both MOFs were stable and retained their structure. This study indicates that UiO-66 and UiO-66-NH2 are great candidates for designing long-term stable mixed matrix membranes with higher anti-fouling performance.

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Effect of TiB2 particle addition on the mechanical properties of Al/TiB2 in situ formed metal matrix composites

Materials Testing ◽

10.3139/120.111273 ◽

2018 ◽

Vol 60 (12) ◽

pp. 1221-1224 ◽

Cited By ~ 4

Author(s):

Balachandran Gobalakrishnan ◽

P. Ramadoss Lakshminarayanan ◽

Raju Varahamoorthi

Keyword(s):

Mechanical Properties ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Tib2 Particle ◽

Matrix Composites ◽

Particle Addition

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Gravity-Driven Membrane Reactor for Decentralized Wastewater Treatment: Effect of Reactor Configuration and Cleaning Protocol

Membranes ◽

10.3390/membranes11060388 ◽

2021 ◽

Vol 11 (6) ◽

pp. 388

Author(s):

Ihtisham Ul Haq Shami ◽

Bing Wu

Keyword(s):

Wastewater Treatment ◽

Municipal Wastewater ◽

Economic Feasibility ◽

Reactor Configuration ◽

Membrane Performance ◽

Decentralized Wastewater Treatment ◽

Water Head ◽

Cake Layer ◽

Gravity Driven ◽

Cleaning Protocol

In this study, three gravity-driven membrane (GDM) reactors with flat sheet membrane modules and various biocarriers (synthetic fibers, lava stones, and sands) were operated for municipal wastewater treatment. The effects of water head, periodically cleaning protocol, and operation temperature on the GDM reactor performance were illustrated in terms of membrane performance and water quality. The results indicated that: (1) the cake layer fouling was predominant (>~85%), regardless of reactor configuration and operation conditions; (2) under lower water head, variable water head benefited in achieving higher permeate fluxes due to effective relaxation of the compacted cake layers; (3) the short-term chemical cleaning (30–60 min per 3–4 days) improved membrane performance, especially when additional physical shear force was implemented; (4) the lower temperature had negligible effect on the GDM reactors packed with Icelandic lava stones and sands. Furthermore, the wastewater treatment costs of the three GDM reactors were estimated, ranging between 0.31 and 0.37 EUR/m3, which was greatly lower than that of conventional membrane bioreactors under lower population scenarios. This sheds light on the technical and economic feasibility of biocarrier-facilitated GDM systems for decentralized wastewater treatment in Iceland.

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Impact of pretreatment on RO membrane organic fouling: composition and adhesion of tertiary wastewater effluent organic matter

Environmental Science Water Research & Technology ◽

10.1039/d0ew01098g ◽

2021 ◽

Author(s):

Nadine Siebdrath ◽

Bertram Skibinski ◽

Shiju Abraham ◽

Roy Bernstein ◽

Robert Berger ◽

...

Keyword(s):

Organic Matter ◽

Wastewater Effluent ◽

Effluent Organic Matter ◽

Membrane Performance ◽

Organic Fouling ◽

Ro Membrane

Organic fouling in RO desalination of tertiary wastewater is of major concern in the decline in membrane performance.

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Dye Separation and Antibacterial Activities of Polyaniline Thin Film-Coated Poly(phenyl sulfone) Membranes

Membranes ◽

10.3390/membranes11010025 ◽

2020 ◽

Vol 11 (1) ◽

pp. 25

Author(s):

Javed Alam ◽

Arun Kumar Shukla ◽

Mohammad Azam Ansari ◽

Fekri Abdulraqeb Ahmed Ali ◽

Mansour Alhoshan

Keyword(s):

Zeta Potential ◽

Surface Properties ◽

Antibacterial Activities ◽

Pani Film ◽

Force Microscopy ◽

Water Permeation ◽

Membrane Pores ◽

Membrane Performance ◽

Phenyl Sulfone ◽

The Impact

We fabricated a nanofiltration membrane consisting of a polyaniline (PANI) film on a polyphenylsulfone (PPSU) substrate membrane. The PANI film acted as a potent separation enhancer and antimicrobial coating. The membrane was analyzed via scanning electron microscopy and atomic force microscopy to examine its morphology, topography, contact angle, and zeta potential. We aimed to investigate the impact of the PANI film on the surface properties of the membrane. Membrane performance was then evaluated in terms of water permeation and rejection of methylene blue (MB), an organic dye. Coating the PPSU membrane with a PANI film imparted significant advantages, including finely tuned nanometer-scale membrane pores and tailored surface properties, including increased hydrophilicity and zeta potential. The PANI film also significantly enhanced separation of the MB dye. The PANI-coated membrane rejected over 90% of MB with little compromise in membrane permeability. The PANI film also enhanced the antimicrobial activity of the membrane. The bacteriostasis (BR) values of PANI-coated PPSU membranes after six and sixteen hours of incubation with Escherichia coli were 63.5% and 95.2%, respectively. The BR values of PANI-coated PPSU membranes after six and sixteen hours of incubation with Staphylococcus aureus were 70.6% and 88.0%, respectively.

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Ceramic membrane performance in microfiltration of oily wastewater

Desalination ◽

10.1016/j.desal.2010.07.055 ◽

2011 ◽

Vol 265 (1-3) ◽

pp. 222-228 ◽

Cited By ~ 173

Author(s):

Sareh Rezaei Hosein Abadi ◽

Mohammad Reza Sebzari ◽

Mahmood Hemati ◽

Fatemeh Rekabdar ◽

Toraj Mohammadi

Keyword(s):

Ceramic Membrane ◽

Oily Wastewater ◽

Membrane Performance

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Modification of Hydrogen Zeolite with CeO2 and its Catalysis Application for Preparing Aspirin

Materials Science Forum ◽

10.4028/www.scientific.net/msf.809-810.884 ◽

2014 ◽

Vol 809-810 ◽

pp. 884-889

Author(s):

Zhen Tan ◽

Hui Ying Chen ◽

Bi Hao Lan ◽

Xiang Wen Tong ◽

Xiao Mei Ba

Keyword(s):

Heat Treatment ◽

Calcination Temperature ◽

Catalytic Efficiency ◽

Optimal Conditions ◽

Calcination Time ◽

Zeolite Framework ◽

High Efficient ◽

Zeolite Particle ◽

Before And After ◽

Impregnation Temperature

Hydrogen zeolite was modified with CeO2 by impregnation - filtration - heat treatment. Hydrogen-zeolite samples before and after modification were characterized by XRD and SEM. The catalytic efficiency of modified hydrogen-zeolite was investigated. Such modification conditions were explored: as the CeO2 percentage, calcination temperature, calcination time, impregnation temperature. The results show that the optimal CeO2 percentage is 0.5%, calcination temperature is 600°C, calcination time is 2h, impregnation temperature is 75°C. The aspirin yield reaches 78.3% under the optimal conditions, compared with that (64.8%) catalyzed by sulfuric acid and that (70.4%) catalyzed by unmodified zeolite. XRD, SEM characterizations show that Ce ions can be doped into the zeolite framework. And the modification makes the zeolite particle size become smaller, which is reduced to 50.5nm from 56.76nm. A high efficient and eco-enviromently catalyst was got by modification.

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