Microfiltration of micro-sized suspensions of boron-selective resin with PVDF membranes

Darwish, Nawaf Bin; Kochkodan, Victor; Hilal, Nidal

doi:10.1016/j.desal.2016.04.018

Cited by 24 publications

(10 citation statements)

References 35 publications

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“…All these approaches basically depend on two strategies: (i) separation by sorption on a substrate, and (ii) separation by membrane filtration. Recent studies have also focused on a hybrid approach combining sorption and membrane filtration in the same process [24,26]. Per the Global Water Desalination Equipment Market Report, 2020-2027, reverse osmosis technology is currently the approach most often employed for water desalination (https://www.grandviewresearch.com/ industry-analysis/water-desalination-equipment-market).…”

Section: Boron Chemistry In Watermentioning

confidence: 99%

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An updated review on boron removal from water through adsorption processes

et al. 2021

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Boron is an essential micronutrient that has raised much interest, given the narrow balance between its necessity and toxicity. Both natural and anthropogenic emissions of boron into water sources can eventually deteriorate water quality and endanger the ecosystem. In this review, we first present a general outline of the importance of boron, boron chemistry in water, boron contamination, and its consequences followed by the recent progress in boron removal methods based on adsorption. The adsorbents for deboronation can generally be classified based on the functional groups present; chelating groups, metal oxides, and layered double hydroxides. To comprehensively address these adsorption methods, a detailed discussion on the reaction mechanism of each system is done followed by a summary of the progress in the field during the past 5 years. Finally, some characterization techniques used in deboronation studies and suggestions for future research and applications together with possible improvements to the existing systems are presented. Graphical abstract

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Section: Boron Chemistry In Watermentioning

confidence: 99%

“…Figure 2(b) represents the basic technologies available for boron removal Fig. 1 Various sources of boron contamination in water [16,17,[20][21][22][23][24][25] Fig. 2 (a) Distribution diagram of boric acid and borate ions in solution at various pH values.…”

Section: Boron Chemistry In Watermentioning

confidence: 99%

An updated review on boron removal from water through adsorption processes

et al. 2021

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“…The chelating capacity of the chelating fabric is 2.15 mmol/g. From the viewpoint of practical use, boron aqueous solution was prepared by dissolving boric acid in deionized water without further adjusting the pH and ionic strength [ 10 , 30 ]. After chelation, the chelating fabric was immersed in 0.1 M HCl for boron elution.…”

Section: Methodsmentioning

confidence: 99%

“…The GMA monomer has vinyl groups and active epoxy rings. The former gives it high graft polymerizability, while the latter gives it high reactivity to introduce various new functions [ 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water

et al. 2021

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A chelating fabric was prepared by graft polymerization of glycidyl methacrylate (GMA) onto a nonwoven fabric, followed by attachment reaction of N-methyl-D-glucamine (NMDG) using an organic solvent-free process. The graft polymerization was performed by immersing the gamma-ray pre-irradiated fabric into the GMA emulsion, while the attachment reaction was carried out by immersing the grafted fabric in the NMDG aqueous solution. The chelating capacity of the chelating fabric prepared by reaction in the NMDG aqueous solution without any additives reached 1.74 mmol/g, which further increased to above 2.0 mmol/g when surfactant and acid catalyst were added in the solution. The boron chelation of the chelating fabric was evaluated in a batch mode. Fourier transform infrared spectrophotometer (FTIR) was used to characterize the fabrics. The chelating fabric can quickly chelate boron from water to form a boron ester, and a high boron chelating ability close to 18.3 mg/g was achieved in the concentrated boron solution. The chelated boron can be eluted completely by HCl solution. The regeneration and stability of the chelating fabric were tested by 10 cycles of the chelation-elution operations. Considering the organic solvent-free preparation process and the high boron chelating performance, the chelating fabric is promising for the boron removal from water.

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“…The absolute pore size denotes the size of the smallest particle completely retained. The retention properties are mainly affected by the filter properties (e.g., porosity and its filter area), as well as by the suspensions physicochemical characteristics (e.g., viscosity, pH, and ionic strength) and the process conditions (e.g., differential pressure and temperature) [41]. Many types of materials can be used, and there are various recovery rates for different filter materials, but polytetrafluoroethylene (PTFE) shows the best resistance against strong acids and other aggressive chemicals [42].…”

Section: Introductionmentioning

confidence: 99%

Microfiltration of Submicron-Sized and Nano-Sized Suspensions for Particle Size Determination by Dynamic Light Scattering

Ullmann

Babick

2019

Nanomaterials

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Dynamic light scattering (DLS) is commonly used for the determination of average particle diameters and suspension stability and popular in academics and industry. However, DLS is not considered suitable for polydisperse samples. The presence of little quantities of micrometre particles in nano and submicrometre suspensions especially affect the reliability of DLS results. Microfiltration might be a suitable method for the removal of unwanted large particles. This study investigates the effect of microfiltration on the diameter distributions as measured by DLS. Polystyrene standards (40–900 nm diameter), and monomodal silica suspensions were filtered with polytetrafluoroethylene (PTFE) membranes (0.1–1.0 µm pore size) to investigate retention properties and grade efficiency. Non-ideal materials were used to prove the results. Experiments showed that a mono-exponential decay can be achieved by filtration. A size safety factor of at least three between labeled pore size and average diameter was found to keep separation as low as possible. Filtration in order to enhance DLS for particulate submicrometre materials was considered suitable for narrowly distributed coated titania and kaolin powder. In a regulatory context, this might have an impact on considering a substance false positive or false negative according to the European Commission (EC) recommendation of a definition of the term nanomaterial.

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Microfiltration of micro-sized suspensions of boron-selective resin with PVDF membranes

Cited by 24 publications

References 35 publications

An updated review on boron removal from water through adsorption processes

An updated review on boron removal from water through adsorption processes

Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water

Microfiltration of Submicron-Sized and Nano-Sized Suspensions for Particle Size Determination by Dynamic Light Scattering

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