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Applied Sciences
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Advanced Extraction, Separation and Purification Processes
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Advanced Extraction, Separation and Purification Processes

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: closed (15 June 2021) | Viewed by 13157

Special Issue Editors

Dr. Marcos Fallanza Torices

E-Mail Website
Guest Editor
Department of Chemical and Biomolecular Engineering, University of Cantabria, 39005 Santander, Cantabria, Spain
Interests: membranes; ionic liquids; microfluidics; advanced separations; (bio)sensors
Dr. Lucía Gómez-Coma

E-Mail Website
Guest Editor
Departamento de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avenida de los Castros s/n, 39005 Santander, Cantabria, Spain
Interests: CO2 capture; membranes; electrochemistry; catalytic reactor; (bio)sensors; reverse electrodialysis; wastewater management
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special issue on “Advanced Extraction, Separation and Purification Processes” of Applied Sciences covers a set of cutting-edge research topics related to the separation or recovery of compounds paying special attention to recent advances with respect to the current state of the art and its implementation towards the achievement of the objectives of sustainable development. This Special Issue intends to gather medium-sized review papers or original research articles featuring relevant and recent developments or achievements in advanced separation processes and their applications in different fields. Papers can cover experimental or theoretical aspects or both.

Dr. Marcos Fallanza Torices
Dr. Lucía Gómez-Coma
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Separation processes
  • Mass and heat transport
  • Simulation and optimization
  • Advanced materials
  • Circular economy
  • Energy and resource efficiency
  • Sustainability
  • Microfluidics
  • Membranes
  • Extraction
  • Green chemistry

Published Papers (5 papers)

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Research

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14 pages, 2989 KiB  
Article
Non-Enzymatic Amperometric Glucose Screen-Printed Sensors Based on Copper and Copper Oxide Particles
by Carlota Guati, Lucía Gomez-Coma, Marcos Fallanza and Inmaculada Ortiz
Appl. Sci. 2021, 11(22), 10830; https://doi.org/10.3390/app112210830 - 17 Nov 2021
Cited by 8 | Viewed by 2439
Abstract
Non-enzymatic amperometric glucose sensors have gained much attention in the past decade because of the better chemical and thermal stability and biocompatibility compared to conventional sensors based on the use of biomolecules. This study focuses on a novel copper and copper oxide-based glucose [...] Read more.
Non-enzymatic amperometric glucose sensors have gained much attention in the past decade because of the better chemical and thermal stability and biocompatibility compared to conventional sensors based on the use of biomolecules. This study focuses on a novel copper and copper oxide-based glucose sensor synthesized by an electrodeposition technique through a rigorous protocol which reports an excellent analytical performance due to its structure and its increased active area. In addition, the linear response range, detection limit and sensitivity were 0.5–5.0 mmol L−1, 0.002 mmol L−1, 904 μA mmol−1 L−1 cm−2, respectively. Results show a reliable electrode as it is chemically stable, exhibits rapid and excellent sensitivity, and it is not significantly affected by coexisting species present in the blood samples; furthermore, it reports a maximum relative standard deviation error (RSD) of 6%, and showed long operating life as the electrode was used for thousand measurements of 4.0 mmol L−1 glucose solution during three days. Full article
(This article belongs to the Special Issue Advanced Extraction, Separation and Purification Processes)
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17 pages, 3044 KiB  
Article
Chemical and Energy Recovery Alternatives in SWRO Desalination through Electro-Membrane Technologies
by Marta Herrero-Gonzalez and Raquel Ibañez
Appl. Sci. 2021, 11(17), 8100; https://doi.org/10.3390/app11178100 - 31 Aug 2021
Cited by 8 | Viewed by 2402
Abstract
Electro-membrane technologies are versatile processes that could contribute towards more sustainable seawater reverse osmosis (SWRO) desalination in both freshwater production and brine management, facilitating the recovery of materials and energy and driving the introduction of the circular economy paradigm in the desalination industry. [...] Read more.
Electro-membrane technologies are versatile processes that could contribute towards more sustainable seawater reverse osmosis (SWRO) desalination in both freshwater production and brine management, facilitating the recovery of materials and energy and driving the introduction of the circular economy paradigm in the desalination industry. Besides the potential possibilities, the implementation of electro-membrane technologies remains a challenge. The aim of this work is to present and evaluate different alternatives for harvesting renewable energy and the recovery of chemicals on an SWRO facility by means of electro-membrane technology. Acid and base self-supply by means of electrodialysis with bipolar membranes is considered, together with salinity gradient energy harvesting by means of reverse electrodialysis and pH gradient energy by means of reverse electrodialysis with bipolar membranes. The potential benefits of the proposed alternatives rely on environmental impact reduction is three-fold: (a) water bodies protection, as direct brine discharge is avoided, (b) improvements in the climate change indicator, as the recovery of renewable energy reduces the indirect emissions related to energy production, and (c) reduction of raw material consumption, as the main chemicals used in the facility are produced in-situ. Moreover, further development towards an increase in their technology readiness level (TRL) and cost reduction are the main challenges to face. Full article
(This article belongs to the Special Issue Advanced Extraction, Separation and Purification Processes)
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18 pages, 1166 KiB  
Article
Impact of Extraction Process in Non-Compliant ‘Bravo de Esmolfe’ Apples towards the Development of Natural Antioxidant Extracts
by Ana A. Vilas-Boas, Ana Oliveira, Tânia B. Ribeiro, Sónia Ribeiro, Catarina Nunes, Ricardo Gómez-García, João Nunes and Manuela Pintado
Appl. Sci. 2021, 11(13), 5916; https://doi.org/10.3390/app11135916 - 25 Jun 2021
Cited by 12 | Viewed by 2282
Abstract
The ‘Bravo de Esmolfe’ apple (BE) is rich in antioxidants and represents one of the most important traditional cultivars in Portugal. A large amount of non-compliant BE, with no market value, it is generated every year. Thus, an effort to find value-added solutions [...] Read more.
The ‘Bravo de Esmolfe’ apple (BE) is rich in antioxidants and represents one of the most important traditional cultivars in Portugal. A large amount of non-compliant BE, with no market value, it is generated every year. Thus, an effort to find value-added solutions is of utmost importance. For the first time, green extraction (microwave-assisted-extraction (MAE) and ultrasound-assisted-extraction (UAE)) were compared against conventional extraction (with (CET) and without temperature (CE)) to select the most efficient process to produce a natural antioxidant extract from non-compliant BE. The results showed that MAE and CET are good methodologies for developing a BE antioxidant extract. However, MAE is more sustainable than CET, requiring less time to reach high temperatures. The MAE-extract showed great antioxidant activity (14.80 ± 0.70 mg TE/g DE by ORAC, 3.92 ± 0.25 mg AAE/g DE by ABTS, and 5.11 ± 0.13 mg TE/g DE by DPPH). This extract revealed high amount of chlorogenic acid (0.48 ± 0.07 mg/g DE), (−)-epicatechin (0.30 ± 0.02 mg/g DE) and phloridzin (0.13 ± 0.01 mg/g DE). This study shows that non-compliant BE is a useful source of antioxidants, being a sustainable way for the recovery of value-added compounds from the rejected fruit in line with sustainable and circular bioeconomy principles. Full article
(This article belongs to the Special Issue Advanced Extraction, Separation and Purification Processes)
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9 pages, 1085 KiB  
Article
Migration Groups: A Poorly Explored Point of View for Genetic Damage Assessment Using Comet Assay in Human Lymphocytes
by Mónica Reynoso-Silva, Carlos Álvarez-Moya, Rafael Ramírez-Velasco, Alexis Gerardo Sámano-León, Erandi Arvizu-Hernández, Hugo Castañeda-Vásquez and Mario Alberto Ruíz-Lopez
Appl. Sci. 2021, 11(9), 4094; https://doi.org/10.3390/app11094094 - 30 Apr 2021
Cited by 3 | Viewed by 1471
Abstract
A new point of view for genetic damage assessment using the comet assay is proposed based on the number of migration groups, the number of comets in each group, and the groups with the highest number of comets. Human lymphocytes were exposed to [...] Read more.
A new point of view for genetic damage assessment using the comet assay is proposed based on the number of migration groups, the number of comets in each group, and the groups with the highest number of comets. Human lymphocytes were exposed to different concentrations of Methyl Methane Sulfonate (MMS), Maleic Hydrazide (MH), 2,4-Dichlorophenoxyacetic (2,4-D), and N-nitroso diethylamine (NDEA). Using comet assay, the migration means of the comets were determined and later grouped arbitrarily in migration groups with no higher differences than 1 µc. The number of migration groups, the number of comets in each group, and the groups with the highest number of comets (modes) were determined. All four of the genotoxic agents studied showed a significant increase (p < 0.05) in the tail length and the number of migration groups compared to the negative control. The number of migration groups did not show a significant variation between the four-genotoxic agents nor within their different concentrations. However, the comparison of the modes did show differences between the genotoxic agents, but not within the concentrations of a same genotoxic agent, which indicated a determined chemical interaction on the DNA. These parameters can improve the detection of genetic damage associated with certain genotoxic agents. Full article
(This article belongs to the Special Issue Advanced Extraction, Separation and Purification Processes)
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Review

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14 pages, 3685 KiB  
Review
Rare Earth Magnet Recycling and Materialization for a Circular Economy—A Korean Perspective
by Mohammad Zarar Rasheed, Myung-suk Song, Sang-min Park, Sun-woo Nam, Javid Hussain and Taek-Soo Kim
Appl. Sci. 2021, 11(15), 6739; https://doi.org/10.3390/app11156739 - 22 Jul 2021
Cited by 4 | Viewed by 3552
Abstract
The Republic of Korea is one of the largest consumers and a leading exporter of electronics, medical appliances, and heavy and light vehicles. Rare-earth (RE)-based magnets are indispensable for these technologies, and Korea is totally dependent on imports of compounds or composites of [...] Read more.
The Republic of Korea is one of the largest consumers and a leading exporter of electronics, medical appliances, and heavy and light vehicles. Rare-earth (RE)-based magnets are indispensable for these technologies, and Korea is totally dependent on imports of compounds or composites of REEs, as the country lacks natural resources. Effect on rare earth supply chain significantly affects Korea’s transition towards a green economy. This study investigates the Republic of Korea’s approach to developing a secure rare earth supply chain for REE magnets via a recycling and materialization process known as ReMaT. It investigates the progress Korea has made so far regarding ReMaT from both technical and non-technical perspectives. Rare earth elements are successfully recycled as part of this process while experiments at the industrial scale is carried out. In this paper, the research results in terms of the extraction efficiency of rare earth elements are discussed and a comparison with previous relevant studies is provided. This study also highlights the opportunities and challenges regarding the implementation of the ReMaT process in order to create a downstream rare earth value chain based on circular economy principles. Full article
(This article belongs to the Special Issue Advanced Extraction, Separation and Purification Processes)
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