Sustainable Separations Using Organic Solvent Nanofiltration

Ghazali, Nazlee Faisal; Lim, Ki Min

doi:10.1002/9781119740117.ch19

Cited by 3 publications

(3 citation statements)

References 103 publications

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“…Using the procedure, the rejection of negative dyes was higher than 93.4%. Different membrane cascade configurations were investigated as a possible direction of development for yield improvement in solvent recovery (Ghazali and Lim 2022).…”

Section: These Methodsmentioning

confidence: 99%

Physicochemical methods for process wastewater treatment: powerful tools for circular economy in the chemical industry

Tóth

Fózer

Mizsey

et al. 2022

Reviews in Chemical Engineering

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In the chemical industry, a typical problem is the appropriate treatment of the process wastewaters. The biological treatment cannot be usually applied because of the high content of organochemical compounds. However, phsycicochemical methods can significantly contribute to the proper treatment of the process wastewater and usually also allows the recovery of the polluting materials. This phenomenon opens the application area of physicochemical methods for the treatment of process wastewater and can contribute not only to the aims of the circular economy but also to the zero liquid discharge. Besides literature studies, authors’ own results and innovations have been also presented. The treatment strategy for pharmaceutical process wastewater is reviewed in detail, which also serves to point out that hybrid methods can be usually efficient to solve the primary goal–maximum recovery and reuse of polluting materials.

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Section: These Methodsmentioning

confidence: 99%

Physicochemical methods for process wastewater treatment: powerful tools for circular economy in the chemical industry

Tóth

Fózer

Mizsey

et al. 2022

Reviews in Chemical Engineering

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“…In this paper, we report the first effective membrane separation of mixtures of C18 FAs or FAMEs using covalent organic framework (COF) mixed matrix membranes in polyepoxy (Figure c). Membrane separations are highly desired because they are an inexpensive method to separate chemicals and are easily scaled to industrial levels. − Numerous examples of membranes that can separate gases and low boiling point liquids from each other have been developed and are used commercially, but there are a limited number of examples of commercial organic solvent nanofiltration (OSN) membranes. , There have been a few reports of the separation of small, saturated FAs or FAMEs (C1–C3) utilizing a membrane process in aqueous solutions and their different solubilities. − However, the separation of C18 FAMEs or FAs has been heavily understudied, and most reports on the separation of FAMEs have focused on their separation from triglycerides or glycerol. − FAs and FAMEs are challenging to separate using membranes because they possess very similar sizes and shapes due to rotation about the C–C bonds (Figure b) . In prior work, we investigated the separation of C18 FAMEs using polyepoxy membranes, but these membranes failed to separate them.…”

Section: Introductionmentioning

confidence: 99%

“…Membrane separations are highly desired because they are an inexpensive method to separate chemicals and are easily scaled to industrial levels. 26 − 31 Numerous examples of membranes that can separate gases and low boiling point liquids from each other have been developed and are used commercially, but there are a limited number of examples of commercial organic solvent nanofiltration (OSN) membranes. 32 , 33 There have been a few reports of the separation of small, saturated FAs or FAMEs (C1–C3) utilizing a membrane process in aqueous solutions and their different solubilities.…”

Section: Introductionmentioning

confidence: 99%

Separation of C18 Fatty Acid Esters and Fatty Acids Derived from Vegetable Oils Using Nanometer-Sized Covalent Organic Frameworks Incorporated in Polyepoxy Membranes

Arachchige

Xiong

Bowden

2023

ACS Appl. Nano Mater.

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Fatty acids (FAs) and FA methyl esters (FAMEs) are easily isolated from vegetable oil and are important starting materials for the chemical industry to produce commercial products that are green, biorenewable, and nontoxic. A challenge in these applications is that mixtures of five or more FAs and FAMEs are isolated from a vegetable oil source, and methods to separate these mixtures are decades old and have increasingly high costs associated with the production of high-purity single-component FAs or FAMEs. We developed a method to separate these mixtures using mixed matrix membranes containing nanometer-sized covalent organic frameworks. The 2D, crystalline COFs possessed narrow distributions of pore sizes of 1.3, 1.8, 2.3, and 3.4 nm that separated FAs and FAMEs based on their degrees of unsaturation. The COFs were synthesized, characterized, and then encapsulated at 10 or 20% by weight into a prepolymer of epoxy that was then fully cured. For all mixed matrix membranes, as the degree of unsaturation increased, the FAs or FAMEs had a slower flux. The largest difference in flux was obtained for a COF/epoxy membrane with a pore size of 1.8 nm, and methyl stearate had a 5.9× faster flux than methyl linolenate. These are the first membranes that can separate the important C18 FAs and FAMEs found in vegetable oil.

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Nanomaterials for Environmental Applications

Wirtu,

Jule,

Nagaraj

2024

Advances in Chemical and Materials Engineering

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In this chapter, the authors discuss nanomaterials for environmental application as promising technology of water treatment, air purification, and remediation. Water contamination remains a critical issue in many developing nations, including African countries. Traditionally, chlorine has been employed for water treatment; however, its association with cancer risks has raised significant health concerns. In response to these challenges, nanomaterials have emerged as innovative solutions for environmental remediation due to their unique physicochemical properties. This chapter explores the recent advancements in the application of nanomaterials for addressing environmental pollution. In this chapter, the author discussion attempts to provides a comprehensive overview of the nanomaterial use in water treatment and air purification, highlighting their effectiveness in overcoming traditional treatment limitations and offering sustainable alternatives for improving environmental pollution.

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Sustainable Separations Using Organic Solvent Nanofiltration

Cited by 3 publications

References 103 publications

Physicochemical methods for process wastewater treatment: powerful tools for circular economy in the chemical industry

Physicochemical methods for process wastewater treatment: powerful tools for circular economy in the chemical industry

Separation of C18 Fatty Acid Esters and Fatty Acids Derived from Vegetable Oils Using Nanometer-Sized Covalent Organic Frameworks Incorporated in Polyepoxy Membranes

Nanomaterials for Environmental Applications

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