Showing papers in "Separation and Purification Reviews in 2021"
TL;DR: In this article, industrialization and urbanization are contributing extensively to the production of wastewater, which mostly ends up untreated in water bodies, leading to water pollution. Treatment of wastewater...
Abstract: Industrialization and urbanization are contributing extensively to the production of wastewater, which mostly ends up untreated in water bodies, leading to water pollution. Treatment of wastewater ...
50 citations
40 citations
TL;DR: In this article, rare earth elements play a critical part in industry, especially in the production of high-tech materials, and major global industries developed a strong dependence on rare-earth elements.
Abstract: Strategic elements, such as rare earth elements, play a critical part in industry, especially in the production of high-tech materials. Major global industries developed a strong dependence on rare...
36 citations
TL;DR: In this article, the concentration of thorium in the environment may increase due to waste that is produced from human activities like mining, rare-earth extraction, and rare-energy extraction.
Abstract: Thorium affects human health and causes environmental issues. The concentration of thorium in the environment may increase due to waste that is produced from human activities like mining, rare-eart...
35 citations
TL;DR: In this paper, the kinetic models were widely used to analyze the dynamic adsorption behaviors in a batch system and reveal the mass-transfer mechanisms, and the previous review papers were mainly confined to the des...
Abstract: The kinetic models were widely used to analyze the dynamic adsorption behaviors in a batch system and reveal the mass-transfer mechanisms. The previous review papers were mainly confined to the des...
27 citations
Abstract: Over the last decades, adsorption has emerged as a potential separation process for the removal of heavy metals that are extensively released in effluents from different industries. Among heavy met...
27 citations
TL;DR: In this paper, the authors describe the fabrication of nanoporous membranes from two-dimensional nanomaterials, which has recently gained increased research interest because of their flexibility, freestanding film formability, selectivity, and flexibility.
Abstract: Fabrication of nanoporous membranes from two-dimensional nanomaterial has recently gained increased research interest because of their flexibility, freestanding film formability, selectivity, and a...
25 citations
TL;DR: This review provides an update of protease characteristics, production, downstream processes and industrial applications, and the search for new protease sources has been encouraged in order to meet industrial application requirements.
Abstract: Peptidases or proteases are enzymes with the ability to break peptide bonds. They have been investigated due to their industrial applications in products such as foods and detergents. This review p...
24 citations
TL;DR: Water is the most abundant liquid on Earth, but only 2.5% of worldwide water are fresh as discussed by the authors, and it is impossible to ignore the importance of water in almost every process on Earth.
Abstract: Water is the most abundant liquid on Earth, but only 2.5% of worldwide water are fresh. It is impossible to ignore the importance of water in almost every process on Earth, from the smallest bacter...
23 citations
TL;DR: Mixed matrix membranes (MMMs) have emerged as strong contenders to conventional membranes for gas and liquid separations as discussed by the authors, and numerous studies on filler/matrix combinations have been conducted.
Abstract: Mixed matrix membranes (MMMs) have emerged as strong contenders to conventional membranes for gas and liquid separations. Although numerous studies on filler/matrix combinations have been conducted...
20 citations
TL;DR: In this article, the principle of solvent refining for solar-grade Si purification is reviewed, where Si-based alloy solvents are applied to Si-oxide purification.
Abstract: Applying Si-based alloy solvents to Si purification is considered an emerging technology for the production of solar-grade Si (SOG-Si). This study reviews the principle of solvent refining. Alloy s...
TL;DR: In this paper, the authors proposed a carbon dioxide capture from industrial gases (i.e., flue gases and natural gas) is a crucial process for reducing the environmental impacts of acid gas emissions.
Abstract: Carbon dioxide capture from industrial gases (i.e., flue gases and natural gas) is a crucial process for reducing the environmental impacts of acid gas emissions. However, carbon dioxide capture th...
TL;DR: A rigorous approach to ad-sorption studies is advocated in this paper as a means to improving the experience of researchers and improving the practical value of published work in the field.
Abstract: A rigorous approach to adsorption studies is advocated in this review article as a means to improving the experience of researchers and improving the practical value of published work in the field....
TL;DR: In this article, a review on the extraction of metals from aqueous solutions using supported liquid membranes (SLMs) and polymer inclusion membranes (PIMs) based on ionic liquids (ILs) is presented.
Abstract: ABSTRACT Background: Supported liquid membranes (SLMs) and polymer inclusion membranes (PIMs) are an interesting technology for the recovery and separation of metal ions. This kind of membranes could provide the advantages of hydrometallurgy (i.e. high selectivity, possibility to treat low concentration of metals …) without needing a large organic solvent inventory. Problem: However, the large-scale application of SLMs is limited because of the short lifetime of the process. Several authors claimed a longer lifetime when molecular diluents were replaced by ionic liquids (ILs). Possible solutions: In this review, recent advances on the extraction of metals from aqueous solutions using SLMs and PIMs based on ILs are summarized and discussed. The mechanisms of degradation are reported and the improvements as well as limitations outlined. In SLMs, ILs were shown to improve membrane stability. However, stability is improved with viscous ILs having low solubility in water. ILs were used in PIMs as plasticizers and/or carriers and have shown their potential. However, the effect of ILs on PIM structure is not fully understood. To date, extraction of anionic metallic species is the most relevant field of study for SLMs and PIMs. A larger variety of ILs could be studied to apply this technique for a broader range of metals.
TL;DR: Arsenic removal employing nano adsorbents in both ex-situ and in-sit modes has gained attention among th... as discussed by the authors, which is a global concern as a groundwater contaminant due to its severe health consequences.
Abstract: Arsenic is a global concern as a groundwater contaminant due to its severe health consequences. Its removal employing nano adsorbents in both ex-situ and in-situ modes has gained attention among th...
TL;DR: Forward osmosis (FO) is a membrane-based process that explores the osmotic pressure difference between a feed solution and a draw solution to induce water transport across a semipermeable membrane.
Abstract: Forward osmosis (FO) is a membrane-based process that explores the osmotic pressure difference between a feed solution and a draw solution to induce water transport across a semipermeable membrane....
TL;DR: In this paper, various wastewater treatment methodologies such as chemical oxidation, biological treatment, chemical precipitation, fenton technology, and advanced oxidation processes are used to resolve water pollution problems.
Abstract: Today various wastewater treatment methodologies such as chemical oxidation, biological treatment, chemical precipitation, fenton technology, and advanced oxidation processes are used to resolve wa...
TL;DR: In this paper, the geometry-structure optimization, geometry-parameter optimization, and operation-parametrization optimization of cyclone separators have been studied for improving cyclone separation performance.
Abstract: Current studies on improving the separation performance of cyclone separators focus on five aspects: i] geometry-structure optimization, ii] geometry-parameter optimization, iii] operation-paramete...
TL;DR: Among the various separation technologies used to treat radioactive wastes, membrane technologies have been chosen in this article since they have many advantages over conventional processes, such as low energy consumption and high efficiency.
Abstract: Among the various separation technologies used to treat radioactive wastes, membrane technologies have been chosen in this article since they have many advantages over conventional processes. Membr...
TL;DR: In this article, the authors considered that conventional reverse osmosis is an energy-intensive process, and Aquaporin biomimetic membranes (ABM) is considered one of the strongest alternatives to face global water scarcity.
Abstract: Desalination is considered one of the strongest alternatives to face global water scarcity. Since conventional reverse osmosis is an energy-intensive process, Aquaporin biomimetic membranes (ABM) e...
TL;DR: In this article, a high potential in the food sector not only due to their coloring properties but also due to high antioxidant activity is discussed. But, their structural diversity, susceptibility to heat,...
Abstract: Anthocyanins have a high potential in the food sector not only due to their coloring properties but also due to their high antioxidant activity. Their structural diversity, susceptibility to heat, ...
TL;DR: The proposed review aims at defining a research field that consists in applying SAS to natural extracts for the purification of target compounds, tracing back the origin of the field, discuss the different terminology used to refer to such processes, and suggest appropriate terms for the process and for reported results.
Abstract: Supercritical fluids offer considerable advantages for the isolation of natural products. Supercritical fluids can be used as antisolvents to precipitate selectively target compounds from a mixture...
TL;DR: In this article, self-forming dynamic membrane (SFDM) technology has been gaining significant interest due to its potential advantages, notably lower capital and operational cost and easier fouling con...
Abstract: Introduction Self-forming dynamic membrane (SFDM) technology has been gaining significant interest due to its potential advantages, notably lower capital and operational cost and easier fouling con...
TL;DR: A molecular distillation (MD) is a physical separation method that was developed for several applications in petrochemical, food, cosmetics and pharmaceutical industries as mentioned in this paper, and it has been used in many applications.
Abstract: Introduction: Molecular distillation (MD) is a physical separation method that was developed for several applications in petrochemical, food, cosmetics and pharmaceutical industries. Early industri...
TL;DR: In this article, the propylene/propane separations are carried out by expensive distillation operati cation operati tions, which is called distillation distillation operation.
Abstract: Propane (C3H8) and propylene (C3H6) are important energy resources and raw materials for industrial chemistry. Today, propylene/propane separations are carried out by expensive distillation operati...
TL;DR: In this paper, the authors describe the production of ultraviolet (UV) rays during operation of fluorescent lamps (FLs), which convert UV rays to visible light using fluorescent coating, also known as phosphor.
Abstract: Ultraviolet (UV) rays are produced during operation of fluorescent lamps (FLs). Fluorescent coating, also known as phosphor, converts UV rays to visible light. Various chemical compounds, individua...
TL;DR: Affinity chromatography methods rely on the immobilization of targets on the stationary phase and this step is crucial when dealing with membrane proteins, allowing for a wide range of applications.
Abstract: Affinity chromatography is an often overlooked chromatographic technique regarding receptor/ligand studies. Indeed, biologists have a tendency to focus on more recent biophysical techniques such as...
TL;DR: Theoretical background, instrumentation, and applications of sedimentation field-flow fractionation in thin channels (SdFFF) and non-conventional sedimentation coiled-tube field-fl....
Abstract: Theoretical background, instrumentation, and applications of “conventional” sedimentation field-flow fractionation in thin channels (SdFFF) and “non-conventional” sedimentation coiled-tube field-fl...