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  • Progress in the Pretreatment and Analysis of Flavonoids: An Update since 2013
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-08-04
    Yu Bian; Yuan Zhang; Yu Zhou; Guo-Hui Li; Xue-Song Feng

    Flavonoids, among the major bioactive ingredients in many traditional Chinese medicines, have been widely considered due to their pharmacological and biochemical effects: antioxidant, anti-vascular disease and anti-inflammatory effects. To get a better understanding of the role of flavonoids in medicine, food safety and public health, valid and sensitive methods for their pretreatment and determination

  • Hypericin: Source, Determination, Separation, and Properties
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-07-29
    Jie Zhang; Ling Gao; Jie Hu; Chongjun Wang; Peter-Leon Hagedoorn; Ning Li; Xing Zhou

    Hypericin is a naturally occurring compound synthesized by certain species of the genus Hypericum, with various pharmacological effects. It is used as a natural photosensitizing agent with great potential in photodynamic therapy. This review discusses the latest results about the biosynthetic pathways and chemical synthetic routes to obtain hypericin. Although many analysis methods can be used for

  • Internal Components Optimization in Cyclone Separators: Systematic Classification and Meta-analysis
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-07-20
    Zhuwei Gao; Yaodong Wei; Zhongxin Liu; Chunman Jia; Juan Wang; Jiangyun Wang; Yu Mao

    Current studies on improving the separation performance of cyclone separators focus on five aspects: i] geometry-structure optimization, ii] geometry-parameter optimization, iii] operation-parameter optimization, iv] operating-condition optimization, and v] internal component optimization. Many scholars work on the design and use of internal components in a cyclone separator to solve various industrial

  • Extraction and Separation of Rare Earth Elements by Adsorption Approaches: Current Status and Future Trends
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-07-20
    Mehdi Asadollahzadeh; Rezvan Torkaman; Meisam Torab-Mostaedi

    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 earth materials. Every year, innovations appear in sectors such as modern technology, green energy, or communication technologies needing more strategic metals to increase in the investment profitability

  • Hydrogel materials as an emerging platform for desalination and the production of purified water
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-07-14
    Ali Akbar Salehi; Mohammad Ghannadi-Maragheh; Meisam Torab-Mostaedi; Rezvan Torkaman; Mehdi Asadollahzadeh

    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 bacteria life to the formation of the continents. Today, efforts for the desalination of seawater and brackish water are critical to produce drinking water. In recent years, a novel material: hydrogel, was considered

  • Sedimentation Field-flow Fractionation in Thin Channels and Rotating Coiled Columns: From Analytical to Preparative Scale Separations
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-07-13
    Alexandr I. Ivaneev; Mikhail S. Ermolin; Petr S. Fedotov; Stéphane Faucher; Gaëtane Lespes

    Theoretical background, instrumentation, and applications of “conventional” sedimentation field-flow fractionation in thin channels (SdFFF) and “non-conventional” sedimentation coiled-tube field-flow fractionation (CTFFF) in rotating columns are summarized and compared. Applications are classified into three main groups: environmental studies, material science, and biological studies. SdFFF is a versatile

  • Chemically Modified Polysaccharides for Hexavalent Chromium Adsorption
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-06-28
    Martín Esteban González-López; Cesar Mario Laureano-Anzaldo; Aida Alejandra Pérez-Fonseca; Martín Arellano; Jorge Ramón Robledo-Ortíz

    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 metals, Cr(VI) is relevant due to its high toxicity, and its required concentration limit between 50 and 100 µg/L in water for human consumption. Several adsorbents, including silica, zeolites, clays, and carbon

  • Synthesis of Rare Earth Compounds from Phosphor Coating of Spent Fluorescent Lamps
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-05-18
    Amit Anand

    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, individually or mixed in certain weight ratio, are used as phosphor. Phosphor prepared from rare earth (RE) compounds is energy-efficient. Various components including phosphor are meant to be recycled from FLs once

  • Affinity Chromatography: A Powerful Tool in Drug Discovery for Investigating Ligand/membrane Protein Interactions
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-04-22
    Lucile Lecas; Vincent Dugas; Claire Demesmay

    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 NMR or surface plasmon resonance methods, among others. However, in order to face challenges related to the use of membrane proteins in drug discovery, alternative and/or complementary methods are welcome

  • Current Advances in Separation and Purification of Second-Generation Lactic Acid
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-04-01
    Regiane Alves De Oliveira; Maria Alexandri; Andrea Komesu; Joachim Venus; Carlos Eduardo Vaz Rossell; Rubens Maciel Filho

    Lactic acid is an important chemical as starting chiral material in various applications. It has increased value in the global market. Different studies have presented the possibility to obtain rich lactic acid solutions with high isomeric purity (S-form) from second-generation (2G) feedstocks. The used downstream process is crucial, not only in terms of the overall cost but also for the achievement

  • Lipases: From Production to Applications
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-01-11
    Natália B. Melani; Elias B. Tambourgi; Edgar Silveira

    Lipases (triacylglycerol hydrolases E.C. are enzymes produced by mammals, plants, fungi and bacteria that catalyze the hydrolysis of triacylglycerols into glycerol and fatty acids. Lipases are versatile in lipid biotechnology due to their selective properties, which have been applied in recent years in emulsifiers, pharmaceuticals, cosmetics, flavors, fragrances, as well as for the pretreatment

  • Gas-Particle Cyclonic Separation Dynamics: Modeling and Characterization
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-10-25
    Bingtao Zhao; Dongshen Wang; Yaxin Su; Hua-Lin Wang

    As a stationary intensification processing technology, cyclonic separation has been widely used for multiphase gas-particle separation in the fields of fluidized processing, energy utilization, material synthesis and aerosol classification. The mathematical characterization of gas-particle dynamics inside a cyclone separator is vital in implementing performance prediction, structural design, parameter

  • Oil-In-Water Microemulsion Liquid Chromatography
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-11-19
    Ester Peris-García; Nikita Pankajkumar-Patel; María José Ruiz-Angel; Samuel Carda-Broch; María Celia García-Alvarez-Coque

    Oil-in-water microemulsions (O/W MEs) are obtained spontaneously by mixing two immiscible liquids (water and oil) in the presence of a surfactant. A co-surfactant is also often needed for ME stabilization. The surfactant provides a microstructure with a definite boundary between oil and water phases. O/W MEs are used as mobile phases in a chromatographic mode known as microemulsion liquid chromatography

  • Remediation of Arsenic by Metal/ Metal Oxide Based Nanocomposites/ Nanohybrids: Contamination Scenario in Groundwater, Practical Challenges, and Future Perspectives
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-04-14
    Ajay Kumar; Himanshu Joshi; Anil Kumar

    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 the scientific community from the past two and a half decades. Nanotechnology-based water treatment systems are a logical choice concerning resources and energy efficiency. The literature contains many cases

  • Porous Graphene-based Membranes: Preparation and Properties of a Unique Two-dimensional Nanomaterial Membrane for Water Purification
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-02-17
    Sanjay Remanan; Nagarajan Padmavathy; Sabyasachi Ghosh; Subhadip Mondal; Suryasarathi Bose; Narayan Ch. Das

    Fabrication of nanoporous membranes from two-dimensional nanomaterial has recently gained increased research interest because of their flexibility, freestanding film formability, selectivity, and ability to withstand the applied transmembrane pressure. Among various 2D materials, graphene and its derivatives are widely employed for the preparation of next-generation membranes due to their excellent

  • Recent Research on Development and Modification of Nontoxic Semiconductor for Environmental Application
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2020-01-29
    Muhammad Imran Din; Rida Khalid; Zaib Hussain

    Today various wastewater treatment methodologies such as chemical oxidation, biological treatment, chemical precipitation, fenton technology, and advanced oxidation processes are used to resolve water scarcity concerns. The advanced oxidation processes are considered to be suitable for solving some water issues due to their enhanced features in photo-oxidation of organic compounds. Recent nanoparticle-mediated

  • Membrane-Based Technologies for the Up-Concentration of Municipal Wastewater: A Review of Pretreatment Intensification
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-06-06
    Thiago A. Nascimento; Fernando Fdz-Polanco; Mar Peña

    Municipal wastewater has a high content of recoverable energy, distributed within particulate and soluble organic matters. It is estimated that the anaerobic treatment of that content and the recovery of biogas energy could supply at least enough power to render a wastewater treatment plant electrically self-sufficient. Therefore, an intensification of wastewater pretreatment could separate and concentrate

  • Bio-Inspired Supramolecular Membranes: A Pathway to Separation and Purification of Emerging Pollutants
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-08-13
    Faran Nabeel; Tahir Rasheed; Muhammad Bilal; Chuanlong Li; Chunyang Yu; Hafiz M. N. Iqbal

    Supramolecular membranes based separation and/or purification is an emerging technology with tunable capabilities for several applications. The proposed applications include water desalination, wastewater treatment, and separation and purification of emerging pollutants alleviating the global issue of freshwater scarcity. Advanced water purification and separation methods are required on priority to

  • Membrane-based Separation in Flow Analysis for Environmental and Food Applications
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-08-20
    Inês C. Santos; Raquel B. R. Mesquita; António O. S. S. Rangel

    Membrane-based separation techniques have been used as an efficient process for analyte separation or enrichment and matrix removal. By coupling these techniques to flow-based analysis, sample preparation and analyte detection can be automated and miniaturized. Different membrane separation techniques are available but the most used in flow analysis are gas diffusion, dialysis, supported liquid membranes

  • ASTM Standard Modified Fouling Index for Seawater Reverse Osmosis Desalination Process: Status, Limitations, and Perspectives
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-09-19
    Yongxun Jin; Hyunkyung Lee; Chanhyuk Park; Seungkwan Hong

    Fouling indices have been extensively investigated in membrane applications, for evaluating the feed-water fouling potential and providing guidelines for the pretreatment process. For the past few decades, the silt density index (SDI) has been adopted as the most mature fouling index in many seawater reverse osmosis desalination plants. Recently, a modified fouling index (MFI) has gained attention

  • Boron Removal from Silicon Using Secondary Refining Techniques by Metallurgical Method
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-10-01
    Jijun Wu; Ding Yang; Min Xu; Wenhui Ma; Qiang Zhou; Zhenfei Xia; Yun Lei; Kuixian Wei; Shaoyuan Li; Zhenjie Chen; Keqiang Xie

    Impurity removal, the purification process from metallurgical grade silicon (MG-Si) required to obtain solar grade silicon (SoG-Si), is crucial to the preparation of silicon-based solar cells. Some processes for boron removal by metallurgical method were reviewed. Secondary refining techniques, including gas blowing, slag treatment, plasma refining, solvent refining and other refining silicon techniques

  • An Overview of Proteases: Production, Downstream Processes and Industrial Applications
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-10-19
    Nathiele Contrera Gimenes; Edgar Silveira; Elias Basile Tambourgi

    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 provides an update of protease characteristics, production, downstream processes and industrial applications. Proteases are predominantly produced by microorganisms using submerged and solid-state fermentations

  • Progress in Pretreatment and Analysis of Fatty Acids in Foods: An Update since 2012
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-10-16
    Xiao-Min Liu; Yuan Zhang; Yu Zhou; Guo-Hui Li; Ben-Qing Zeng; Jian-Wei Zhang; Xue-Song Feng

    Fatty acids (FAs) are a class of lipids found in everyday foods that are closely related to human health. These chemicals are involved in many physiological functions. The establishment of methods for the analysis of FAs in different foods is necessary. In this review, an updated overview of the pretreatment and analysis methods that have been reported since 2012 is given. Sample preparation methods

  • Mathematical Modeling Aspect in Solvent Extraction of Metals
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-09-07
    Swagatika Dash; Swati 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

  • Remediation of Thorium (IV) from Wastewater: Current Status and Way Forward
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-07-12
    Eli Syafiqah Aziman; Ahmad Hayaton Jamely Mohd Salehuddin; Aznan Fazli Ismail

    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-earth extraction, and others. If this waste is not handled properly, thorium may leak and cause water contamination. This review summarises the methods of thorium removal from wastewater. The article addresses

  • High hydrostatic pressure for recovery of anthocyanins: effects, performance, and applications
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-06-27
    Julia Martín; Agustin G. Asuero

    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, pH, and copigmentation complicate its extraction and purification. The use of high hydrostatic pressure (HHP) assisted extraction has proven to be a good alternative to conventional techniques as it combines

  • Current Perspectives and Future Prospects of Nano-Biotechnology in Wastewater Treatment
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-06-25
    J. N. Sahu; Rama Rao Karri; Hossain M. Zabed; Shahriar Shams; Xianghui Qi

    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 could be a promising approach in mitigating the pollution. Nano-biotechnology (NBT), which is an emerging technology, has excellent potential in wastewater treatment. Nano-materials have the ability to remove

  • Application of Si-Based Solvents to the Purification of Metallurgical Grade-Silicon
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-06-05
    Yaqiong Li; Lifeng Zhang

    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 systems such as Si–Al, Si–Sn, and Si–Fe are reviewed along with the Si separation method. The effects of solvent refining processing parameters, such as the solvent metal, cooling rate, heating method, and

  • Forward Osmosis Process: State-Of-The-Art of Membranes
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-05-30
    Issa Ndiaye; Sébastien Vaudreuil; Tijani Bounahmidi

    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. Water transport results in the dilution of the draw solution which is reconcentrated using a recovery process. Different from the reverse osmosis process, FO requires lower grade energy and has other advantages

  • Purification of Natural Products by Selective Precipitation Using Supercritical/Gas Antisolvent Techniques (SAS/GAS)
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-05-21
    Alicia Gil-Ramírez; Irene Rodriguez-Meizoso

    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 and to remove impurities by the Supercritical Antisolvent technique (SAS). The present decade has experienced a considerable increase in the number of publications that apply this technique to natural extracts

  • Ionic Separation in Electrodeionization System: Mass Transfer Mechanism and Factor Affecting Separation Performance
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-05-09
    A.N. Hakim; K. Khoiruddin; D. Ariono; I.G. Wenten

    Electrodeionization (EDI), which combines the advantages of electrodialysis (ED) and conventional ion-exchange (IX) processes, has been successfully applied in the production of ultrapure water. With an ability to perform continuous and deep deionization process without regenerating chemicals, EDI has found a number of new interesting applications such as in wastewater treatment, separation and purification

  • Ceramic Membrane Distillation for Desalination
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-05-08
    Zhong Sheng Tai; Mohd Haiqal Abd Aziz; Mohd Hafiz Dzarfan Othman; Mohd Irfan Hatim Mohamed Dzahir; Nur Awanis Hashim; Khong Nee Koo; Siti Khadijah Hubadillah; Ahmad Fauzi Ismail; Mukhlis A Rahman; Juhana Jaafar

    Membrane distillation (MD) is a thermally driven membranous process and in the recent years, it has received increasing attention in desalination. Generally, polymeric membranes have dominated the MD studies due to their intrinsic hydrophobic properties and high availability. On the other hand, the development of ceramic membranes for MD desalination is developing, gradually replacing their polymeric

  • Activated carbon in mixed-matrix membranes
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-05-05
    Jeremy Lewis; Maram A. Q. Al-sayaghi; Chris Buelke; Ali 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

  • Recent Progresses on the Adsorption and Separation of Ions by Imprinting Routes
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-03-30
    Li Chen; Jingwen Dai; Bo Hu; Jixiang Wang; Yilin Wu; Jiangdong Dai; Minjia Meng; Chunxiang Li; Yongsheng Yan

    Imprinting techniques have been investigated extensively for the selective recognition of molecules and ions. However, few reviews focused on the state-of-the-art developments in ion imprinting technique. Ions and their analogs have a charge and usually similar physical and chemical properties, but less functional groups than molecules. The slight differences in charges, sizes and shapes of ions determine

  • Nanomaterials in Protein Sample Preparation
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-03-01
    Estefanía González-García; María Luisa Marina; María Concepción García

    Protein sample preparation is the most critical step in protein analysis of complex samples and is constituted by tedious, time-consuming, and difficult-to-automate steps that usually involve the use of high volumes of solvents. In recent years, novel extraction or digestion nanomaterials (NMs) have been developed aiming to overcome these drawbacks. In this review, we have grouped the recent works

  • Removal of Radionuclides from Fukushima Daiichi Waste Effluents
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-01-10
    Jukka Lehto, Risto Koivula, Heikki Leinonen, Esko Tusa, Risto Harjula

    This paper describes the processes used at the Fukushima Daiichi plant, Japan, to purify the waste effluents generated in the cooling of damaged reactors. These include primary cesium removal with the Kurion zeolite system and the SARRY system utilizing silicotitanate to remove radiocesium from water recirculated to reactors for cooling. Another process is the ALPS system to purify the retentates of

  • Sustainable Production of Biofuels through Membrane-Integrated Systems
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2019-01-03
    Ramesh Kumar; Alak Kumar Ghosh; Parimal Pal

    Literature on biodiesel production over the last 10 years (2007–2018) has been critically reviewed directing further research toward membrane-based sustainable and green production. The manuscript discusses how biodiesel production strategies have evolved in the recent years through adoption of better feedstock, better catalysts, more efficient reactor technology, and through incorporation of more

  • Quantitative Analysis of Artemisinin Derivatives: Applications and Techniques
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-12-28
    Lili Zhang, Yanyan Jiang, Ning Li, Yiqiong Pu, Tong Zhang, Bing Wang

    Research on artemisinin and its derivatives (ARTDs) were initiated due to their outstanding anti-malarial effects. In the past few decades, considerable efforts have been made to extend the clinical applications of ARTDs. However, some ARTDs have a low aqueous solubility, short half-life in vivo and instability due to an endoperoxide bridge in their structures that also contributes to a poor bioavailability

  • Economic Framework of Membrane Technologies for Natural Gas Applications
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-10-25
    V. Martin-Gil, M.Z. Ahmad, R. Castro-Muñoz, V. Fila

    Natural gas is one of the most highly used resources, not only as a fuel but also as a raw material for many industrial processes. In addition, it is an environmental friendly fuel due to its lower greenhouse gas emission than that of coal or oil. However, it is a nonrenewable energy source and the quality of the available resources is expected to deplete continuously. In this scenario, membrane technologies

  • Nanocomposite membranes for organic solvent nanofiltration
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-10-08
    Mohammad Hossein Davood Abadi Farahani; Dangchen Ma; Pegah Nazemizadeh Ardakani

    Organic solvent nanofiltration (OSN) is a molecular separation method which offers a sustainable and reliable solution compared to the conventional energy-intensive separation processes. OSN can be successfully applied to several applications, such as food, pharmaceutical, petrochemical and fine-chemical industries. Current research on OSN membranes mainly focuses on polymeric materials due to the

  • EOV Editorial board
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-09-20

    (2018). EOV Editorial board. Separation & Purification Reviews: Vol. 47, No. 4, pp. 355-355.

  • Separation Technologies for Salty Wastewater Reduction in the Dairy Industry
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-07-23
    G. Q. Chen, S. L. Gras, S. E. Kentish

    The wastewater discharged by cheese manufacturing processes is highly saline. This waste is generated from whey demineralization, chromatography and clean-in-place processes. Salty effluent can be diluted with other effluents and discharged as trade waste but the high salinity can trigger penalties imposed by local water authorities. Alternatively, such waste can be sent to evaporation ponds, but in

  • Microfiber Nonwovens as Potential Membranes
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-05-31
    Yasar Kiyak, Benoît Mazé, Behnam Pourdeyhimi

    This article provides an overview of the membrane bioreactor technology where nonwovens can be applied as an alternative medium for separation. The main objective is to identify the nonwoven characteristics leading to higher removal efficiency, higher flux, and lower fouling behavior. The general limitations associated with common nonwoven separation media are related to the large pore and wide pore

  • Nanoporous Materials as H2S Adsorbents for Biogas Purification: a Review
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-05-24
    Antonio Peluso, Nicola Gargiulo, Paolo Aprea, Francesco Pepe, Domenico Caputo

    Biogas is one of the most promising renewable sources of energy. However, it is also a gas mixture containing acidic gases, such as H2S, useless for energetic purposes, environmentally harmful and damaging for energy conversion devices. This review focuses on nanoporous materials as adsorbents of H2S for biogas purification processes. Cation-exchanged zeolites and impregnated activated carbons have

  • Natural Surfactants and Their Applications for Heavy Oil Removal in Industry
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-05-22
    Nathalia Maria P. Rocha e Silva, Hugo M. Meira, Fabíola Carolina G. Almeida, Rita de Cássia F. Soares da Silva, Darne G. Almeida, Juliana M. Luna, Raquel D. Rufino, Valdemir A. Santos, Leonie A. Sarubbo

    The cleaning of machinery, petroleum storage tanks and equipment leads to the accumulation of petroleum products in the environment. The removal of grease adhered to motors is a specific challenge. Cleaning processes require direct application of surfactants or solvents, which most often generate further environmental problems due to the accumulation of these toxic substances. The majority of available

  • Techno-Economic Feasibility Analysis for Minor Elements Valorization from Desalination Concentrates
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-05-09
    Paloma Ortiz-Albo, Saúl Torres-Ortega, María González Prieto, Ane Urtiaga, Raquel Ibañez

    Water and raw materials scarcity are challenges that our society faces today. Seawater desalination has become essential for the supply of fresh water mainly due to the development of seawater reverse osmosis (SWRO). The depletion of conventional extractable resources and the increase in the use of certain metals encourage the development of nonconventional sources. Attending to the increasing global

  • On the Performance of Free Radicals Combined Electrocoagulation Treatment Processes
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-04-09
    Zakaria Al-Qodah, Mohammad Al-Shannag

    The electrocoagulation (EC) combined treatment processes have shown promising performances in which the removal of pollutants from industrial wastewater was greatly enhanced. The integration of a free radical producing step with EC has been considered as one of these new combinations that show synergy and improvements in the overall cleaning process performance. This review is devoted to discuss and

  • Recent trends in replacement of disperser solvent in dispersive liquid-liquid microextraction methods
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-04-09
    Hassan Sereshti, Parisa Khorram, Nina Nouri

    Since its innovation in 2006, the dispersive liquid-liquid microextraction (DLLME) method has attracted the attention of analytical chemists in the field of sample preparation. This method has been successfully applied to determine trace amounts of pollutants in various matrices, but the restriction in the choice of suitable disperser and extraction solvents, and high disperser solvent consumption

  • Recent Applications of Molecularly Imprinted Polymers in Analytical Chemistry
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-04-06
    Muhammad Imran Malik, Huma Shaikh, Ghulam Mustafa, Muhammad Iqbal Bhanger

    The increased complexity of sample matrices resulted in the requirement of specific and sensitive molecular recognition systems. Although molecular imprinting is an old idea, its potential as molecular recognition tool in analytical chemistry has been revived in recent times. This review intended to comprehensively discuss and evaluate the recent progress in the applications of molecularly imprinted

  • Processes developed for the separation of europium (Eu) from various resources
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-03-30
    Archana Kumari, Manis Kumar Jha, Devendra Deo Pathak, Sanchita Chakravarty, Jae-chun Lee

    Europium (Eu), one of the most significant rare earth (RE) elements, has wide applications as functional material in phosphor production, majorly used in fluorescent lamps, computer monitors, televisions etc. Eu is one of the three divalent lanthanides (along with Yb and Sm) having a reduction potential higher than −2 V. This possibility of Eu reduction is attributed to a relatively stable half-filled

  • Fundamentals of 2, 4 Dichlorophenoxyacetic Acid Removal from Aqueous Solutions
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-03-19
    Nikhilesh S. Trivedi, Sachin A. Mandavgane

    Herbicides are widely used in farmlands worldwide. However, after their application on farmlands, they accumulate in high amounts in continental and marine waters. Herbicides are endocrine disruptors, and are known to cause toxicity, carcinogenicity and mutagenicity. Besides, they also spoil the taste and odor of water bodies. To prevent these effects, it is necessary to perform an in-depth study on

  • Separation and purification of scandium: From industry to medicine
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-01-26
    Krystyna Pyrzyńska, Krzysztof Kilian, Mateusz Pęgier

    Scandium and its compounds are used in many modern industrial fields due to its unique chemical and physical properties. It is mainly recovered from residues and wastes in the production of other metals. The exploitation of the ores and wastes could contaminate water and soil creating environmental problems. This paper discusses recent developments and tendencies in scandium separation, purification

  • Recent Developments and Applications of Three-Phase Partitioning for the Recovery of Proteins
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-01-18
    Kit Wayne Chew, Tau Chuan Ling, Pau Loke Show

    Three-phase partitioning (TPP) is rapidly developing as a novel bioseparation technique for the separation and purification of biomolecules. TPP has been applied in a wide range of applications including enzyme stability and enhancement of its catalytic activity. The partitioning into three phases is mainly dependent on the concentration of alcohol and salt used. TPP provides high enzyme recovery and

  • Optimizing Geometric Parameters in Hydrocyclones for Enhanced Separations: A Review and Perspective
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2018-01-05
    Long Ni, Jinyi Tian, Tao Song, Yongson Jong, Jianing Zhao

    Hydrocyclones have been extensively applied for solid–liquid or liquid–liquid separations in various industries. However, the exact mechanisms underlying the enhanced separation technologies based on the optimization of geometric parameters of hydrocyclones remain unclear, and a number of research teams have performed numerous studies to enlarge the application scope of hydrocyclones by optimizing

  • Synthesis and Applications of Functionalized Magnetic Nanomaterials in Enantioseparation
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2017-12-26
    Xiaojuan Deng, Wenbin Li, Guosheng Ding, Tao Xue, Xiaoping Chen

    Efficient enantioselective separation is a challenging task due to the identical physical and chemical properties of enantiomers. Functionalized magnetic nanomaterials modified with chiral ligands on their surface possess both magnetic property and chiral recognition ability, and have demonstrated great potential in chiral discrimination. This review summarizes the applications of magnetic nanomaterials

  • Surface-Modified Nanocomposite Membranes
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2017-12-19
    Sonia R. Lakhotia, Mausumi Mukhopadhyay, Premlata Kumari

    Access to enough clean and safe water requires improvement over the current state of filtration technology. Membrane technology is one of the best tools for removing dissolved matters and/or particulates during the cleaning process, but some unavoidable intrinsic properties, like flux decline and fouling, reduce the membrane life, stability and separation capacity. To improve membrane performances

  • “Smart” Polymers: Physicochemical Characteristics and Applications in Bio-Separation Strategies
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2017-12-07
    Gustavo Hernández-Vargas, César Alejandro Ponce-Ponce de León, José González-Valdez, Hafiz M. N. Iqbal

    In recent years, smart polymers (SPs), which are also referred to as bio-responsive polymers, have gained considerable attention as a unique class of polymers and their applications have been increasing significantly. These so-called “smart” polymers, either synthetic or biological, have been defined as “polymers designed to respond or undergo physical and structural conformational changes/rearrangement

  • Regeneration of Chitosan-Based Adsorbents for Eliminating Dyes from Aqueous Solutions
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2017-12-06
    Mohammadtaghi Vakili, Shubo Deng, Lu Shen, Danna Shan, Dengchao Liu, Gang Yu

    Chitosan and its derivatives are effective for adsorbing dye molecules from aqueous solutions. However, their use can be limited by environmental concerns on their fate after adsorbent saturation. Desorbing dye molecules and regenerating adsorbents are alternatives to disposing spent adsorbent. In this review, most research topics related to regenerating chitosan-based adsorbents for dye removal are

  • Inorganic Membranes for Hydrogen Separation
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2017-12-04
    Simão P Cardoso, Ivo S Azenha, Zhi Lin, Inês Portugal, Alírio E Rodrigues, Carlos M Silva

    Hydrogen, one of the most promising energy carriers for the future, is currently produced mainly by natural gas reforming or coal gasification, where mixtures containing H2, CO2 and contaminants like CO, H2S and CH4 are obtained. Among other methods, membrane technology has received special attention due to its potential efficiency for hydrogen separation, simplicity of operation, low energy consumption

  • Inorganic Ion Exchangers for Cesium Removal from Radioactive Wastewater
    Sep. Purif. Rev. (IF 5.324) Pub Date : 2017-12-04
    Bruno R Figueiredo, Simão P Cardoso, Inês Portugal, João Rocha, Carlos Manuel Silva

    Ion exchange is a proven process for radioactive wastewater decontamination, where inorganic sorbents are ideal due to their thermal, chemical and radiation stability. This review focuses on the removal of Cs+ by inorganic exchangers, viz. zeolites, titanosilicates, hexacyanoferrates metal oxides and hydrous metal oxides, bentonite/clays and the key family of ammonium phosphomolybdates (AMPs). The

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