Pub Date : 2021-05-29DOI: 10.1080/15422119.2021.1918720
Majid Shahbabaei, Daejoong Kim
ABSTRACT Since past decades, membrane science and technology have received great attention in academia and practice because of their potential for industrial applications. A diverse range of industrial applications has been benefited from this technology thanks to the advances in membrane science. Membranes are of paramount importance in chemical technology and play a key role in a broad range of applications.Membranes incorporating nanosize pores or channels have a tremendous contribution to membrane science discipline, particularly in gas separation technologies. Performing pore-level modeling with the help of computer simulation opens a route to membrane characterization in high accuracy and less observational. By utilizing molecular dynamics simulations, one can provide a fundamental understanding of the static and dynamic features of membranes at a molecular scale. In this work, we have reviewed the recent advances in nanofluidics for gas separation applications, with a major focus on the theoretical literature discussing the gas molecular transport mechanisms through the carbon-based nanopores. Describing the nanofluidics systems, solid-state nanopores, fabrication of nanofluidic devices, pore generation on graphene nanosheets, and pore-level flow modeling, this article expects to provide a platform for understanding the permeation and separation of gases across a variety of nanopores and attracting more attention of audiences from industry and academia.
{"title":"Nanofluidics for Gas Separation Applications: The Molecular Dynamics Simulation Perspective","authors":"Majid Shahbabaei, Daejoong Kim","doi":"10.1080/15422119.2021.1918720","DOIUrl":"https://doi.org/10.1080/15422119.2021.1918720","url":null,"abstract":"ABSTRACT Since past decades, membrane science and technology have received great attention in academia and practice because of their potential for industrial applications. A diverse range of industrial applications has been benefited from this technology thanks to the advances in membrane science. Membranes are of paramount importance in chemical technology and play a key role in a broad range of applications.Membranes incorporating nanosize pores or channels have a tremendous contribution to membrane science discipline, particularly in gas separation technologies. Performing pore-level modeling with the help of computer simulation opens a route to membrane characterization in high accuracy and less observational. By utilizing molecular dynamics simulations, one can provide a fundamental understanding of the static and dynamic features of membranes at a molecular scale. In this work, we have reviewed the recent advances in nanofluidics for gas separation applications, with a major focus on the theoretical literature discussing the gas molecular transport mechanisms through the carbon-based nanopores. Describing the nanofluidics systems, solid-state nanopores, fabrication of nanofluidic devices, pore generation on graphene nanosheets, and pore-level flow modeling, this article expects to provide a platform for understanding the permeation and separation of gases across a variety of nanopores and attracting more attention of audiences from industry and academia.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77371018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-05-29DOI: 10.1080/15422119.2020.1846564
G. Zante, M. Boltoeva, Abderrazak Masmoudi, R. Barillon, D. Trébouet
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.
{"title":"Supported ionic liquid and polymer inclusion membranes for metal separation","authors":"G. Zante, M. Boltoeva, Abderrazak Masmoudi, R. Barillon, D. Trébouet","doi":"10.1080/15422119.2020.1846564","DOIUrl":"https://doi.org/10.1080/15422119.2020.1846564","url":null,"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.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79482624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-22DOI: 10.1080/15422119.2021.1901742
Muhammad Mubashir, Fernanda Neira d’Angelo, F. Gallucci
ABSTRACT In the past few years, research on the fabrication of deep eutectic solvents (DESs)-based supported liquid membranes (SLMs) is increasing tremendously due to their significant advantages such as low mass transport resistance, high performance, easy scale-up, low cost and simple operation. However, fabrication of DES-based SLMs is challenging and highly dependent on the fabrication parameters: DES properties and properties of membrane supports. Subsequently, the fabrication methods, immersion, pressure-based impregnation and vacuum filtration also affect the permeation performance of DES-based SLMs in liquids and gases separation. Furthermore, the SLM durability is influenced by the DES properties and process parameters including: temperature, pressure, and feed composition. Firstly, present work reviews the current progress and fabrication of DES-based SLMs. Subsequently, it presents a perspective on different strategies that use DESs as a unique tunable platform to design advanced SLMs for liquids and gases separation reported in the literature. In the next step, performances of the SLMs membranes for liquids and gases separation are described in details. The effects of process parameters on DES-based SLMs are also highlighted prior to the challenges. Lastly, challenges and future research opportunities are highlighted.
{"title":"Recent Advances and Challenges of Deep Eutectic Solvent based Supported Liquid Membranes","authors":"Muhammad Mubashir, Fernanda Neira d’Angelo, F. Gallucci","doi":"10.1080/15422119.2021.1901742","DOIUrl":"https://doi.org/10.1080/15422119.2021.1901742","url":null,"abstract":"ABSTRACT In the past few years, research on the fabrication of deep eutectic solvents (DESs)-based supported liquid membranes (SLMs) is increasing tremendously due to their significant advantages such as low mass transport resistance, high performance, easy scale-up, low cost and simple operation. However, fabrication of DES-based SLMs is challenging and highly dependent on the fabrication parameters: DES properties and properties of membrane supports. Subsequently, the fabrication methods, immersion, pressure-based impregnation and vacuum filtration also affect the permeation performance of DES-based SLMs in liquids and gases separation. Furthermore, the SLM durability is influenced by the DES properties and process parameters including: temperature, pressure, and feed composition. Firstly, present work reviews the current progress and fabrication of DES-based SLMs. Subsequently, it presents a perspective on different strategies that use DESs as a unique tunable platform to design advanced SLMs for liquids and gases separation reported in the literature. In the next step, performances of the SLMs membranes for liquids and gases separation are described in details. The effects of process parameters on DES-based SLMs are also highlighted prior to the challenges. Lastly, challenges and future research opportunities are highlighted.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89930704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-23DOI: 10.1080/15422119.2021.1878221
A. K. Pabby, B. Swain, N. Sonar, V. K. Mittal, T. Valsala, S. Ramsubramanian, D. Sathe, R. Bhatt, Sameer Pradhan
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. Membrane technology can be classified into different processes and, for each process, progress made till date in the radioactive decontamination of water is presented. The new directions are shown by considering advances made in membrane manufacturing and membrane processes. Thus, the combined efforts of the researchers who are engaged in membrane and membrane process design and in nuclear waste treatment were highlighted. This article focuses on applications of membrane technology in the nuclear industry and covers recent advances particularly in the field of radioactive liquid waste processing on laboratory, pilot and plant scale. Forward osmosis is highlighted for radioactive waste treatment as several recent publications pointed its potential. Some of our results Bhabha Atomic Research Centre, India) with respect to membrane-based processes are also presented.
{"title":"Radioactive waste processing using membranes: State of the art technology, challenges and perspectives","authors":"A. K. Pabby, B. Swain, N. Sonar, V. K. Mittal, T. Valsala, S. Ramsubramanian, D. Sathe, R. Bhatt, Sameer Pradhan","doi":"10.1080/15422119.2021.1878221","DOIUrl":"https://doi.org/10.1080/15422119.2021.1878221","url":null,"abstract":"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. Membrane technology can be classified into different processes and, for each process, progress made till date in the radioactive decontamination of water is presented. The new directions are shown by considering advances made in membrane manufacturing and membrane processes. Thus, the combined efforts of the researchers who are engaged in membrane and membrane process design and in nuclear waste treatment were highlighted. This article focuses on applications of membrane technology in the nuclear industry and covers recent advances particularly in the field of radioactive liquid waste processing on laboratory, pilot and plant scale. Forward osmosis is highlighted for radioactive waste treatment as several recent publications pointed its potential. Some of our results Bhabha Atomic Research Centre, India) with respect to membrane-based processes are also presented.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81818822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-21DOI: 10.1080/15422119.2021.1887223
J. Millanar-Marfa, L. Borea, F. Castrogiovanni, S. Hasan, K. Choo, G. Korshin, M. D. Luna, F. Ballesteros, V. Belgiorno, Vincenzo Naddeo
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 control, over conventional membranes used in membrane bioreactors. SFDM technology utilizes inexpensive support material integrated with a dynamic membrane (DM) made of suspended solids and biomass to provide high effluent quality. Objectives This paper aims to bridge the gap between the previous reviews and the current studies to provide a comprehensive review on SFDM applications to both aerobic and anaerobic bioreactors. Literature review The historical development of DMs since the 1960s up to the present is presented. Specific attention was given to DM formation mechanisms, deposition time, impacts of design, and operational factors (mesh characteristics and sludge properties) on DM formation and performances and on DM-based integrated systems. Abbreviations AnDMBR, anaerobic dynamic membrane bioreactor; CFV,crossflow velocity; COD,chemical oxygen demand; DM,dynamic membrane; DO,dissolved oxygen; EPS,extracellular polymeric substances; F/M,food to microorganisms ratio; HRT,hydraulic retention time; J,flux; MBR,membrane bioreactor; MF,microfiltration; MLSS,mixed liquor suspended solids; PSD,particle size distribution; RO,reverse osmosis; SEM,scanning electron microscopy; SFDM,self-forming dynamic membrane; SMP,soluble microbial products; SRT,sludge retention time; SS,suspended solids; TMP,transmembrane pressure; TN,total nitrogen; TP,total phosphorus; TSS,total suspended solids; UF,ultrafiltration
{"title":"Self-forming Dynamic Membranes for Wastewater Treatment","authors":"J. Millanar-Marfa, L. Borea, F. Castrogiovanni, S. Hasan, K. Choo, G. Korshin, M. D. Luna, F. Ballesteros, V. Belgiorno, Vincenzo Naddeo","doi":"10.1080/15422119.2021.1887223","DOIUrl":"https://doi.org/10.1080/15422119.2021.1887223","url":null,"abstract":"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 control, over conventional membranes used in membrane bioreactors. SFDM technology utilizes inexpensive support material integrated with a dynamic membrane (DM) made of suspended solids and biomass to provide high effluent quality. Objectives This paper aims to bridge the gap between the previous reviews and the current studies to provide a comprehensive review on SFDM applications to both aerobic and anaerobic bioreactors. Literature review The historical development of DMs since the 1960s up to the present is presented. Specific attention was given to DM formation mechanisms, deposition time, impacts of design, and operational factors (mesh characteristics and sludge properties) on DM formation and performances and on DM-based integrated systems. Abbreviations AnDMBR, anaerobic dynamic membrane bioreactor; CFV,crossflow velocity; COD,chemical oxygen demand; DM,dynamic membrane; DO,dissolved oxygen; EPS,extracellular polymeric substances; F/M,food to microorganisms ratio; HRT,hydraulic retention time; J,flux; MBR,membrane bioreactor; MF,microfiltration; MLSS,mixed liquor suspended solids; PSD,particle size distribution; RO,reverse osmosis; SEM,scanning electron microscopy; SFDM,self-forming dynamic membrane; SMP,soluble microbial products; SRT,sludge retention time; SS,suspended solids; TMP,transmembrane pressure; TN,total nitrogen; TP,total phosphorus; TSS,total suspended solids; UF,ultrafiltration","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79294168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-26DOI: 10.1080/15422119.2020.1866011
S. Mgiba, V. Mhuka, N. Hintsho-Mbita, N. Mketo
ABSTRACT Organosulfur compounds (OSCs) are found in various matrices including fossil fuels, petrochemicals, food, environmental and biological samples. However, these OSCs can be beneficial or detrimental, depending on various factors. For example, OSCs found in vegetables have shown to be anti-inflammatory, antibiotic, lipid regulators and anti-cancer compounds. Additionally, OSCs found in alcoholic beverages enhance the aroma and taste. Alternatively, OSCs in fossil fuels can cause catalyst poisoning during fossil fuel processing which can result in H2S formation. The H2S can corrode processing machinery and liberate toxic sulfur emissions to the atmosphere, which then react with water to form harmful acid rain. Thus, monitoring concentration levels of OSCs in various samples is of interest. In this review, chromatographic analytical techniques that are mostly reported for both qualitative and quantitative determination of OSCs in various matrices are described based on direct (no sample preparation) and indirect (sample preparation needed) analyses. The merits and possible limitations associated with direct and indirect analyses are also discussed. Furthermore, the analytical performances of the various published sample preparation methods are evaluated in terms of accuracy, limit of detection and precision. Lastly, this review highlights current gaps in OSC chromatographic determination and possible future developments.
{"title":"Trends in the Direct and Indirect Chromatographic Determination of Organosulfur Compounds in Various Matrices","authors":"S. Mgiba, V. Mhuka, N. Hintsho-Mbita, N. Mketo","doi":"10.1080/15422119.2020.1866011","DOIUrl":"https://doi.org/10.1080/15422119.2020.1866011","url":null,"abstract":"ABSTRACT Organosulfur compounds (OSCs) are found in various matrices including fossil fuels, petrochemicals, food, environmental and biological samples. However, these OSCs can be beneficial or detrimental, depending on various factors. For example, OSCs found in vegetables have shown to be anti-inflammatory, antibiotic, lipid regulators and anti-cancer compounds. Additionally, OSCs found in alcoholic beverages enhance the aroma and taste. Alternatively, OSCs in fossil fuels can cause catalyst poisoning during fossil fuel processing which can result in H2S formation. The H2S can corrode processing machinery and liberate toxic sulfur emissions to the atmosphere, which then react with water to form harmful acid rain. Thus, monitoring concentration levels of OSCs in various samples is of interest. In this review, chromatographic analytical techniques that are mostly reported for both qualitative and quantitative determination of OSCs in various matrices are described based on direct (no sample preparation) and indirect (sample preparation needed) analyses. The merits and possible limitations associated with direct and indirect analyses are also discussed. Furthermore, the analytical performances of the various published sample preparation methods are evaluated in terms of accuracy, limit of detection and precision. Lastly, this review highlights current gaps in OSC chromatographic determination and possible future developments.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88945400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-26DOI: 10.1080/15422119.2021.1874415
X. Chen, Anguo Xiao, D. Rodrigue
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 operations which are energy intensive. Therefore, there is a great interest in the development of new separation technologies like membrane modules. In this work, we collected and analyzed the data from neat polymers and mixed matrix membranes (MMM) for propylene/propane separations. Polymeric membranes are easily processed, but one important problem is plasticization since both propylene and propane are condensable gases resulting in a loss of selectivity. To improve the properties of polymer membranes, MMM were developed based on an inorganic filler and a polymer matrix to get improved performances with a synergistic effect. However, these performances strongly depend on the filler type and content, as well as their compatibility. In this review, the separation performances of neat polymers and MMM flat membranes and hollow fibers are reported. A comparison of the single gas and mixed gas permeation is presented where both permeability and selectivity are lost due to plasticization and the competitive sorption between gas molecules. Based on the results available, it can be concluded that more development can lead to improved performances for industrial-scale applications in the petroleum industries. Also, an upper bound for C3H6/C3H8 separation is proposed using neat polymers.
{"title":"Polymer-based Membranes for Propylene/Propane Separation","authors":"X. Chen, Anguo Xiao, D. Rodrigue","doi":"10.1080/15422119.2021.1874415","DOIUrl":"https://doi.org/10.1080/15422119.2021.1874415","url":null,"abstract":"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 operations which are energy intensive. Therefore, there is a great interest in the development of new separation technologies like membrane modules. In this work, we collected and analyzed the data from neat polymers and mixed matrix membranes (MMM) for propylene/propane separations. Polymeric membranes are easily processed, but one important problem is plasticization since both propylene and propane are condensable gases resulting in a loss of selectivity. To improve the properties of polymer membranes, MMM were developed based on an inorganic filler and a polymer matrix to get improved performances with a synergistic effect. However, these performances strongly depend on the filler type and content, as well as their compatibility. In this review, the separation performances of neat polymers and MMM flat membranes and hollow fibers are reported. A comparison of the single gas and mixed gas permeation is presented where both permeability and selectivity are lost due to plasticization and the competitive sorption between gas molecules. Based on the results available, it can be concluded that more development can lead to improved performances for industrial-scale applications in the petroleum industries. Also, an upper bound for C3H6/C3H8 separation is proposed using neat polymers.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88506450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-22DOI: 10.1080/15422119.2021.1888299
M. Hubbe
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. Three broad areas of concern are considered in this article: mistakes related to the experimental conditions selected, mistakes related to modeling of results, and mistakes related to the mind-set of the investigators. Adsorption experiments can be perceived as an excellent training ground within which to hone the skills of researchers, including experimental methods, the use of statistics, and the ability to find suitable equations by referring to published literature. There is potential to increase the value to society of the results of such work by insisting upon the acquisition of truly meaningful results, in addition to accurately following research strategies laid out in published work. Examples related to adsorption onto cellulosic materials are emphasized in this article.
{"title":"Insisting upon Meaningful Results from Adsorption Experiments","authors":"M. Hubbe","doi":"10.1080/15422119.2021.1888299","DOIUrl":"https://doi.org/10.1080/15422119.2021.1888299","url":null,"abstract":"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. Three broad areas of concern are considered in this article: mistakes related to the experimental conditions selected, mistakes related to modeling of results, and mistakes related to the mind-set of the investigators. Adsorption experiments can be perceived as an excellent training ground within which to hone the skills of researchers, including experimental methods, the use of statistics, and the ability to find suitable equations by referring to published literature. There is potential to increase the value to society of the results of such work by insisting upon the acquisition of truly meaningful results, in addition to accurately following research strategies laid out in published work. Examples related to adsorption onto cellulosic materials are emphasized in this article.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89827162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/15422119.2019.1609986
Jeremy Lewis, Maram A. Q. Al-sayaghi, Chris Buelke, A. Alshami
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 and thoroughly reviewed, a review of activated carbon (AC) as a filler has thus far been minimal. This review intends to fill this gap via critically analyzing the state-of-the-art on AC as a filler in MMMs. Aspects of AC-MMM research, with emphasis on AC fabrication from biomass pyrolysis, AC-MMM fabrication and resulting properties, and influence of AC on MMM performance are thoroughly elucidated. Furthermore, the various applications that have been investigated with AC-MMM membranes, and several predictive models that have been specifically utilized for AC-MMMs are also discussed.
{"title":"Activated carbon in mixed-matrix membranes","authors":"Jeremy Lewis, Maram A. Q. Al-sayaghi, Chris Buelke, A. Alshami","doi":"10.1080/15422119.2019.1609986","DOIUrl":"https://doi.org/10.1080/15422119.2019.1609986","url":null,"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 and thoroughly reviewed, a review of activated carbon (AC) as a filler has thus far been minimal. This review intends to fill this gap via critically analyzing the state-of-the-art on AC as a filler in MMMs. Aspects of AC-MMM research, with emphasis on AC fabrication from biomass pyrolysis, AC-MMM fabrication and resulting properties, and influence of AC on MMM performance are thoroughly elucidated. Furthermore, the various applications that have been investigated with AC-MMM membranes, and several predictive models that have been specifically utilized for AC-MMMs are also discussed.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88991781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-02DOI: 10.1080/15422119.2019.1648294
Swagatika Dash, S. Mohanty
This paper gives an overview of the major research carried out on mathematical modeling for solvent extraction of metals, primarily in the last one decade. The basic theory of solvent extraction as well as, the operational mechanism of various extractors (mixer-settler, column extractors, and liquid membranes) have been described. It discusses different approaches of mathematical modeling for studying solvent extraction of metals, starting from the simple empirical models to more rigorous transport phenomena models. Further, theoretical studies using molecular level modeling techniques such as molecular mechanics (MM), density functional theory, quantum mechanics/MM and Our own N-layered integrated molecular orbital and molecular mechanics (ONIOM) methods implemented for studying metal-ligand complexation have been reviewed.
{"title":"Mathematical Modeling Aspect in Solvent Extraction of Metals","authors":"Swagatika Dash, S. Mohanty","doi":"10.1080/15422119.2019.1648294","DOIUrl":"https://doi.org/10.1080/15422119.2019.1648294","url":null,"abstract":"This paper gives an overview of the major research carried out on mathematical modeling for solvent extraction of metals, primarily in the last one decade. The basic theory of solvent extraction as well as, the operational mechanism of various extractors (mixer-settler, column extractors, and liquid membranes) have been described. It discusses different approaches of mathematical modeling for studying solvent extraction of metals, starting from the simple empirical models to more rigorous transport phenomena models. Further, theoretical studies using molecular level modeling techniques such as molecular mechanics (MM), density functional theory, quantum mechanics/MM and Our own N-layered integrated molecular orbital and molecular mechanics (ONIOM) methods implemented for studying metal-ligand complexation have been reviewed.","PeriodicalId":21744,"journal":{"name":"Separation & Purification Reviews","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79849960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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