Filtration and removal performances of membrane adsorbers

Yürekli, Yılmaz; Yıldırım, Mehmet Sinan; Aydın, Levent; Savran, Melih

doi:10.1016/j.jhazmat.2017.02.061

Cited by 28 publications

(9 citation statements)

References 29 publications

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“…For example, households in Flint, MI, and public schools across the United States, many of which still rely on legacy lead pipes for plumbing and transporting water, were recently exposed to dangerously high levels of lead in their drinking water. , This public health crisis has been addressed temporarily by distributing bottled water and expensive filters to residents and schools, but more sustainable and cost-effective solutions are still in critical need. Conventional methods for the removal of lead from tap water, typically present in trace quantities, include filtration − and ion exchange, − though these systems are costly and require either regular chemical regeneration or frequent replacement. , …”

Section: Introductionmentioning

confidence: 99%

Continuous and Selective Removal of Lead from Drinking Water by Shock Electrodialysis

et al. 2021

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The affordable and effective removal of traces of toxic heavy metal ions, especially lead, from contaminated drinking water in the presence of excess sodium or other competing ions has been a long-standing goal in environmental science and engineering. Here, we demonstrate the possibility of continuous, selective, and economical removal of lead from dilute feedwater using shock electrodialysis. For models of lead-contaminated tap water, this process can remove approximately 95% of dissolved lead (to safe levels below 1 ppb), compared to 40% of sodium ions, at 60% water recovery and at an electrical energy cost of only 0.01 kW h m −3 . We are able to fit and interpret the separation data with a pore-depth-averaged electrokinetic model that reveals the mechanisms for selective separation of lead ions. This selectivity is enabled by the faster transport of lead ions from the charged porous medium to the cathode stream, as well as their larger barrier to escape to the fresh stream compared to sodium ions. The experimental and theoretical results could be used to guide the development of low-cost, point-of-use systems for continuous removal of lead from municipal water.

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Section: Introductionmentioning

confidence: 99%

Continuous and Selective Removal of Lead from Drinking Water by Shock Electrodialysis

et al. 2021

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“…The experiments proposed by Doehlert matrix and the experimental values of physical properties are shown in Table 2. The accuracy and validity of the used model was confirmed by the analysis of variance (ANOVA) [40][41][42] represented in Table 3.…”

Section: Experimental Designmentioning

confidence: 78%

Phosphate Mine Tailing Recycling in Membrane Filter Manufacturing: Microstructure and Filtration Suitability

Loutou¹,

Misrar

Koudad

et al. 2019

Minerals

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Ceramic membrane filters based on industrial by-products can be considered to be a valorization alternative of phosphate mine tailings, even more so if these ceramic membranes are used in the industrial wastewater treatment due to their good mechanical, chemical, and thermal resistance. The depollution of textile industry rejections with this method has not been studied in detail previously. In this work, ceramic membrane filters have been manufactured from natural clay and phosphate mine tailings (phosphate sludge). Blends of the abovementioned materials with a pore-forming agent (sawdust, up to 20 wt. %) were investigated in the range 900–1100 °C using thermal analysis, X-ray diffraction, scanning electron microscopy, and mercury porosimetry. Ceramic properties were measured as a function of firing temperature and sawdust addition. Filtration tests were carried out on samples with advantageous properties. The results showed that gehlenite together with diopside neoformed from lime decomposed carbonates and breakdown products of clay minerals, while calcium phosphate derived from partial decomposition of fluorapatite. Both quartz and fluorapatite resisted heating. The results of the experimental design showed that the variations of physical properties versus processing factors were well described by the polynomial model. Filtration results are quite interesting, allowing these membranes to be used in industrial effluent treatment.

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“…Similar effects have been reported for other hydrophilic modifiers. 5,17,26,27 The higher porosity is expected to increase membrane permeability, which is discussed later.…”

Section: Methodsmentioning

confidence: 97%

A Polysulfone/Cobalt Metal–Organic Framework Nanocomposite Membrane with Enhanced Water Permeability and Fouling Resistance

Gil

Huang

Zuo

et al. 2022

ACS Appl. Polym. Mater.

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Ultrafiltration membranes are widely used in water and wastewater applications. The two most important membrane characteristics that determine the cost-effectiveness of an ultrafiltration membrane process are membrane permeability and fouling resistance. Metal−organic frameworks (MOFs) have been intensively investigated as highly selective sorbents and superior (photo) catalysts. Their potential as membrane modifiers has also received attention recently. In this study, a non-functionalized, water-stable, nanocrystalline mixed ligand octahedral MOF containing carboxylate and amine groups with a cobalt metal center (MOF-Co) was incorporated into polysulfone (PSF) ultrafiltration (UF) membranes at a very low nominal concentration (2 and 4 wt %) using the conventional phase inversion method. The resultant PSF/MOF-Co_4% membrane exhibited water permeability up to 360% higher than of the control PSF membrane without sacrificing the selectivity of the membrane, which had not been previously achieved by an unmodified MOF. In addition, the PSF/MOF-Co_4% membrane showed strong resistance to fouling by natural organic matter (NOM), with 87 and 83% reduction in reversible and irreversible NOM fouling, respectively, compared to the control PSF membrane. This improvement was attributed to the increases in membrane porosity and surface hydrophilicity resulting from the high hydrophilicity of the MOF-Co. The capability of increasing membrane water permeability and fouling resistance without compromising membrane selectivity makes the MOF-Co and potentially other hydrophilic MOFs excellent candidates as membrane additives.

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Filtration and removal performances of membrane adsorbers

Cited by 28 publications

References 29 publications

Continuous and Selective Removal of Lead from Drinking Water by Shock Electrodialysis

Continuous and Selective Removal of Lead from Drinking Water by Shock Electrodialysis

Phosphate Mine Tailing Recycling in Membrane Filter Manufacturing: Microstructure and Filtration Suitability

A Polysulfone/Cobalt Metal–Organic Framework Nanocomposite Membrane with Enhanced Water Permeability and Fouling Resistance

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