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Sharma A, Lee BS. Toxicity test profile for deep eutectic solvents: A detailed review and future prospects. CHEMOSPHERE 2024; 350:141097. [PMID: 38171392 DOI: 10.1016/j.chemosphere.2023.141097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/27/2023] [Accepted: 12/30/2023] [Indexed: 01/05/2024]
Abstract
Deep eutectic solvents (DESs) are preferable in terms of starting materials, storage and synthesis, simplicity, and component material affordability. In several industries ranging from chemical, electrochemical, biological, biotechnology, material science, etc., DES has demonstrated remarkable potential. Despite all these accomplishments, the safety issue with DES must be adequately addressed. Different DES interacts with the cellular membranes differently. It is not possible to classify all DES as easily biodegradable. By expanding the current understanding of the toxicity and biodegradation of DES, interactions between organisms and cellular membranes can be linked. The DES toxicity profile varies according to their concentration, the nature of the individual components, and how they interact with living things. Therefore, the results of this review can serve as a baseline for DES development in the future.
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Affiliation(s)
- Anshu Sharma
- Department of Chemical Engineering, Kangwon National University, Chuncheon, Kangwon 24341, Republic of Korea.
| | - Bong-Seop Lee
- Department of Chemical Engineering, Kangwon National University, Chuncheon, Kangwon 24341, Republic of Korea.
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2
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Bastos H, Schaeffer N, Pringle JM, Coutinho JAP, Pozo-Gonzalo C. Enhanced Dissolution of Metal Oxides in Hydroxylated Solvents - Towards Application in Lithium-Ion Battery Leaching. CHEMSUSCHEM 2023; 16:e202300455. [PMID: 37317672 DOI: 10.1002/cssc.202300455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/16/2023] [Indexed: 06/16/2023]
Abstract
The recovery of critical metals from spent lithium-ion batteries (LIBs) is rapidly growing. Current methods are energy-intensive and hazardous, while alternative solvent-based strategies require more studies on their 'green' character, metal dissolution mechanism and industrial applicability. Herein, we bridged this gap by studying the effect of dilute HCl solutions in hydroxylated solvents to dissolve Co, Ni and Mn oxides. Ethylene glycol emerged consistently as the most effective solvent, dissolving up to four times more Co and Ni oxides than using aqueous acidic media, attributed to improved chloro-complex formation and solvent effects. These effects had a significant contribution compared to acid type and concentration. The highest Co dissolution (0.27 M) was achieved in 0.5 M HCl in 25 % (v/v) glycerol in water, using less acid and a significant amount of water compared to other solvent systems, as well as mild temperatures (40 °C). This solvent was applied to dissolve battery cathode material, achieving 100 % dissolution of Co and Mn and 94 % dissolution of Ni, following what was concluded to be a mixed mechanism. These results offer a simple alternative to current leaching processes, reducing acid consumption, enhancing atomic efficiency, and paving the way for optimized industrial hydrometallurgical processes leaning to 'greener' strategies.
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Affiliation(s)
- Henrique Bastos
- Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria, 3125, Australia
| | - Nicolas Schaeffer
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 -, Aveiro, Portugal
| | - Jennifer M Pringle
- Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria, 3125, Australia
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 -, Aveiro, Portugal
| | - Cristina Pozo-Gonzalo
- Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria, 3125, Australia
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3
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Abranches DO, Coutinho JAP. Everything You Wanted to Know about Deep Eutectic Solvents but Were Afraid to Be Told. Annu Rev Chem Biomol Eng 2023; 14:141-163. [PMID: 36888992 DOI: 10.1146/annurev-chembioeng-101121-085323] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
Abstract
Are deep eutectic solvents (DESs) a promising alternative to conventional solvents? Perhaps, but their development is hindered by a plethora of misconceptions. These are carefully analyzed here, beginning with the very meaning of DESs, which has strayed far beyond its original scope of eutectic mixtures of Lewis or Brønsted acids and bases. Instead, a definition that is grounded on thermodynamic principles and distinguishes between eutectic and deep eutectic is encouraged, and the types of precursors that can be used to prepare DESs are reviewed. Landmark works surrounding the sustainability, stability, toxicity, and biodegradability of these solvents are also discussed, revealing piling evidence that numerous DESs reported thus far, particularly those that are choline based, lack sufficient sustainability-related traits to be considered green solvents. Finally, emerging DES applications are reviewed, emphasizing their most remarkable feature: the ability to liquefy a solid compound with a target property, allowing its use as a liquid solvent.
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Affiliation(s)
- Dinis O Abranches
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal; ,
| | - João A P Coutinho
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal; ,
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Makoś-Chełstowska P. VOCs absorption from gas streams using deep eutectic solvents - A review. JOURNAL OF HAZARDOUS MATERIALS 2023; 448:130957. [PMID: 36860043 DOI: 10.1016/j.jhazmat.2023.130957] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/27/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Volatile organic compounds (VOCs) are one of the most severe atmospheric pollutants. They are mainly emitted into the atmosphere from anthropogenic sources such as automobile exhaust, incomplete fuel combustion, and various industrial processes. VOCs not only cause hazards to human health or the environment but also adversely affect industrial installation components due to their specific properties, i.e., corrosive and reactivity. Therefore, much attention is being paid to developing new methods for capturing VOCs from gaseous streams, i.e., air, process streams, waste streams, or gaseous fuels. Among the available technologies, absorption based on deep eutectic solvents (DES) is widely studied as a green alternative to other commercial processes. This literature review presents a critical summary of the achievements in capturing individual VOCs using DES. The types of used DES and their physicochemical properties affecting absorption efficiency, available methods for evaluating the effectiveness of new technologies, and the possibility of regeneration of DES are described. In addition, critical comments on the new gas purification methods and future perspectives are included.
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Affiliation(s)
- Patrycja Makoś-Chełstowska
- Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, 80-233 Gdansk, Poland; EcoTech Center, Gdańsk University of Technology, 80-233 Gdańsk, Poland.
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Joarder S, Bansal D, Meena H, Kaushik N, Tomar J, Kumari K, Bahadur I, Ha Choi E, Kaushik NK, Singh P. Bioinspired green deep eutectic solvents: preparation, catalytic activity, and biocompatibility. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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6
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Martínez GM, Townley GG, Martínez-Espinosa RM. Controversy on the toxic nature of deep eutectic solvents and their potential contribution to environmental pollution. Heliyon 2022; 8:e12567. [PMID: 36619414 PMCID: PMC9813709 DOI: 10.1016/j.heliyon.2022.e12567] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 11/24/2022] [Accepted: 12/15/2022] [Indexed: 12/25/2022] Open
Abstract
Deep eutectic solvents (DES) are promising reaction media where interesting catalytic processes can be carried out. In theory, most of these mixtures are environmentally friendly, being an alternative to traditionally pollutant organic solvents used in several processes related to organic chemistry and biotechnology. However, recent studies show contradictory results regarding their toxicity. The method selected to perform toxicity studies could be significantly conditioned by some of the physical properties displayed by the DESs. Also, the metabolic capabilities of the organisms/cells used to monitor their toxicity are influenced by their physical properties. In this review, relevant physical-chemical properties for toxicity studies are summarized. The advantages/disadvantages of the used tests to monitor their toxicity and biodegradability in connection with the chosen organisms/cells are discussed, shedding light on their limitations. These findings could be taken as a starting point for designing more accurate DESs toxicity studies covering a wider spectrum of organisms and cells to be used as biomodels to monitor environmental pollution caused by DESs.
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Affiliation(s)
- Guillermo Martínez Martínez
- Biochemistry and Molecular Biology Division, Agrochemistry and Biochemistry Department, Faculty of Sciences, Ap. 99, E-03080, Alicante, Spain
- Multidisciplinary Institute for Environmental Studies (IMEM), University of Alicante, Ap. 99, E-03080, Alicante, Spain
| | - Gabriela Guillena Townley
- Organic Chemistry Department and Organic Synthesis Institute (ISO), University of Alicante, Ap. 99, E-03080, Alicante, Spain
| | - Rosa María Martínez-Espinosa
- Biochemistry and Molecular Biology Division, Agrochemistry and Biochemistry Department, Faculty of Sciences, Ap. 99, E-03080, Alicante, Spain
- Multidisciplinary Institute for Environmental Studies (IMEM), University of Alicante, Ap. 99, E-03080, Alicante, Spain
- Corresponding author.
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7
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Current methodologies for the assessment of deep eutectic systems toxicology: Challenges and perspectives. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Marchel M, Cieśliński H, Boczkaj G. Deep eutectic solvents microbial toxicity: Current state of art and critical evaluation of testing methods. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:127963. [PMID: 34896723 DOI: 10.1016/j.jhazmat.2021.127963] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/19/2021] [Accepted: 11/29/2021] [Indexed: 06/14/2023]
Abstract
Deep eutectic solvents (DESs) were described at the beginning of 21st century and they consist of a mixture of two or more solid components, which gives rise to a lower melting point compared to the starting materials. Over the years, DESs have proved to be a promising alternative to traditional organic solvents and ionic liquids (ILs) due to their low volatility, low inflammability, easy preparation, and usually low cost of compounds used in their preparation. All these properties encouraged researchers to use them in diverse fields and applications e.g., as extractants for biomolecules and solvents in pharmaceutical and cosmetic industries. Nevertheless, despite undeniable potential of DESs, there is still controversy about their toxicity. Besides the low number of studies on this topic, there are also some contradicting reports on biocompatibility of these solvents. Such misleading reports could be mainly attributed to the lack of well design standard protocol for DESs toxicity determination or the use of out-off-purpose methodology. Thus, to better apply DESs in green and sustainable chemistry, more studies on their impact on organisms at different trophic levels and the use of proper techniques are required. This review focuses on DESs toxicity towards microorganisms and is divided into three parts: The first part provides a brief general introduction to DESs, the second part discusses the methodologies used for assessment of DESs microbial toxicity and the obtained results, and finally in the third part the critical evaluation of the methods is provided, as well as suggestions and guidelines for future research.
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Affiliation(s)
- Mateusz Marchel
- Gdansk University of Technology, Faculty of Chemistry, Department of Process Engineering and Chemical Technology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland
| | - Hubert Cieśliński
- Gdansk University of Technology, Faculty of Chemistry, Department of Molecular Biotechnology and Microbiology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland
| | - Grzegorz Boczkaj
- Gdansk University of Technology, Faculty of Chemistry, Department of Process Engineering and Chemical Technology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland; EkoTech Center, Gdansk University of Technology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland.
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Abstract
Deep eutectic solvents (DESs) are a relatively new type of solvent that have attracted the attention of the scientific community due to their environmentally friendly properties and their versatility in many applications. Many possible DESs have been described and, thus, it is not easy to unequivocally characterize and generalize their properties. This is especially important in the case of the (eco)toxicity information that can be found for these mixtures. In this review, we collect data on the human and environmental toxicity of DESs, with the aim of gathering and exploring the behavioral patterns of DESs. The toxicity data found were analyzed attending to different factors: hydrogen bond donors or acceptors that form part of the eutectic mixture, pH, and the presence of organic acids in the DES molar ratio of the components, or interactions with natural compounds. In the case of ecotoxicity, results generally depend on the biomodel studied, along with other factors that have been also revised. Finally, we also carried out a revision of the biodegradation of DESs.
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Mohd Fuad F, Mohd Nadzir M, Harun@Kamaruddin A. Hydrophilic natural deep eutectic solvent : A review on physicochemical properties and extractability of bioactive compounds. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116923] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Rodríguez-Juan E, López S, Abia R, J. G. Muriana F, Fernández-Bolaños J, García-Borrego A. Antimicrobial activity on phytopathogenic bacteria and yeast, cytotoxicity and solubilizing capacity of deep eutectic solvents. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116343] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Schuur B, Brouwer T, Sprakel LMJ. Recent Developments in Solvent-Based Fluid Separations. Annu Rev Chem Biomol Eng 2021; 12:573-591. [PMID: 33852351 DOI: 10.1146/annurev-chembioeng-102620-015346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The most important developments in solvent-based fluid separations, separations involving at least one fluid phase, are reviewed. After a brief introduction and discussion on general solvent trends observed in all fields of application, several specific fields are discussed. Important solvent trends include replacement of traditional molecular solvents by ionic liquids and deep eutectic solvents and, more recently, increasing discussion around bio-based solvents in some application fields. Furthermore, stimuli-responsive systems are discussed; the most significant developments in this field are seen for CO2-switchable and redox-responsive solvents. Discussed fields of application include hydrocarbons separations, carbon capture, biorefineries, and metals separations. For all but the hydrocarbons separations, newly reported electrochemically mediated separations seem to offer exciting new windows of opportunities.
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Affiliation(s)
- Boelo Schuur
- Sustainable Process Technology Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands; , ,
| | - Thomas Brouwer
- Sustainable Process Technology Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands; , ,
| | - Lisette M J Sprakel
- Sustainable Process Technology Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands; , ,
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Zainal-Abidin MH, Hayyan M, Wong WF. Hydrophobic deep eutectic solvents: Current progress and future directions. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.03.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Lapeña D, Errazquin D, Lomba L, Lafuente C, Giner B. Ecotoxicity and biodegradability of pure and aqueous mixtures of deep eutectic solvents: glyceline, ethaline, and reline. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:8812-8821. [PMID: 33070294 DOI: 10.1007/s11356-020-11144-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 10/05/2020] [Indexed: 05/16/2023]
Abstract
Most of the works carried out on deep eutectic solvents (DESs) make reference to their physicochemical properties, and the analysis of their toxicological behavior on the environment and biodegradability are still limited. In this work, an exhaustive study on the ecotoxicity of three pure deep eutectic solvents (reline, glyceline, and ethaline) and their mixtures with water (reline-water, glyceline-water, and ethaline-water) was carried out in different biomodels: bacteria (A. fisheri), crustaceans (D. magna), and algae (S. capricornatum). In addition, the amount of chlorophyll in the algae after exposure to the DESs was analyzed. Finally, the biodegradability of the studied DESs was also analyzed. The ecotoxic behavior strongly depends on both the biomodel tested and the presence of water in the mixture, resulting in low toxicities in all cases. Furthermore, most of the deep eutectic solvents studied can be considered readily biodegradable. A comparison of the ecotoxicity and biodegradability of these solvents under other conditions has also been provided, and a complete analysis is given.
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Affiliation(s)
- David Lapeña
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autov A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Diego Errazquin
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autov A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Laura Lomba
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autov A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Carlos Lafuente
- Departamento Química Física, Facultad de Ciencias, Instituto Agroalimentario de Aragón-IA2, Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - Beatriz Giner
- Facultad de Ciencias de la Salud, Universidad San Jorge, Campus Universitario, Autov A23 km 299, 50830, Villanueva de Gállego, Zaragoza, Spain.
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Bystrzanowska M, Tobiszewski M. Assessment and design of greener deep eutectic solvents – A multicriteria decision analysis. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114878] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Seo D, Shin S, Oh S, Lee M, Seo S. Rapid eco-toxicity analysis of hazardous and noxious substances (HNS) using morphological change detection in Dunaliella tertiolecta. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Development of biocompatible DES/NADES as co-solvents for efficient biosynthesis of chiral alcohols. Bioprocess Biosyst Eng 2020; 43:1987-1997. [DOI: 10.1007/s00449-020-02387-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 06/01/2020] [Indexed: 12/27/2022]
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Giner B, Lafuente C, Lapeña D, Errazquin D, Lomba L. QSAR study for predicting the ecotoxicity of NADES towards Aliivibrio fischeri. Exploring the use of mixing rules. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 191:110004. [PMID: 31810589 DOI: 10.1016/j.ecoenv.2019.110004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/21/2019] [Accepted: 11/23/2019] [Indexed: 05/24/2023]
Abstract
(Eco)toxicological information of natural deep eutectic solvents (NADES) is scarce, and thus, quantitative structure activity relationship (QSAR) models are an important tool for achieving the prediction of toxicity in this case. For that reason, in this manuscript, a new QSAR model for predicting the ecotoxicity of NADES towards the Aliivibrio fischeri biomodel, using mixing rules, is proposed. The main advantage of the method is that the individual components of the mixtures are molecularly modelled, and then, a mixing rule is used, which simplifies the process. For developing the model, a total of 11 descriptors for each component is used: the dissociation constant, partition coefficient, Van der Waals volume, Van der Waals surface area, topological polar surface area, solvent accessible surface area, minimum projection area, maximum projection area, minimum projection radius, maximum projection radius and molecular weight. The final obtained model includes the topological polar surface area and the dissociation constant, mechanistically interpreted as the ability of a NADES to transport through biological membranes and the severe negative effect of pH on the toxicity and biological response of Aliivibrio fischeri bacteria. The OECD Guidance Document on the Validation of (Quantitative) Structure-Activity Relationships is followed to develop the mathematical model.
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Affiliation(s)
- Beatriz Giner
- Facultad de Ciencias de La Salud, Universidad San Jorge, Campus Universitario, Autov A23 Km 299, 50830, Villanueva de Gállego, Zaragoza, Spain.
| | - Carlos Lafuente
- Departamento Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - David Lapeña
- Facultad de Ciencias de La Salud, Universidad San Jorge, Campus Universitario, Autov A23 Km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Diego Errazquin
- Facultad de Ciencias de La Salud, Universidad San Jorge, Campus Universitario, Autov A23 Km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
| | - Laura Lomba
- Facultad de Ciencias de La Salud, Universidad San Jorge, Campus Universitario, Autov A23 Km 299, 50830, Villanueva de Gállego, Zaragoza, Spain
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van Osch DJGP, van Spronsen J, Esteves ACC, Tuinier R, Vis M. Oil-in-water emulsions based on hydrophobic eutectic systems. Phys Chem Chem Phys 2020; 22:2181-2187. [PMID: 31912861 DOI: 10.1039/c9cp06762k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We demonstrate that oil-in-water emulsions can be prepared from hydrophobic eutectic systems (ES). Light microscopy and dynamic light scattering show that droplets are formed and zeta potential measurements indicate sufficient stability against coalescence. We investigate whether Ostwald ripening occurs in these ES-in-water emulsions by following the droplet growth over time and comparing it with an emulsion comprising decane in water. At first sight, the Ostwald ripening rate of the ES-in-water emulsion is expected to be orders of magnitude larger than the ripening of the decane-in-water emulsion due to a much higher solubility of the dispersed phase. However, experimentally we find that the ES-in-water emulsion actually grows a factor of two slower than the decane-in-water emulsion. We attribute this to the two-component nature of the ES, since the growth rate is mainly set by the least-soluble component of the ES. Thus, ESs offer the advantage of creating liquid emulsions of solid components, while setting the emulsion stability through their composition.
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Affiliation(s)
- Dannie J G P van Osch
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap van Spronsen
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
| | - A Catarina C Esteves
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Remco Tuinier
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands and Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Faculty of Science, Utrecht University, Hugo R. Kruyt Building, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Mark Vis
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands and Laboratoire de Chimie, Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon CEDEX 07, France
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Zainal-Abidin MH, Hayyan M, Ngoh GC, Wong WF, Looi CY. Emerging frontiers of deep eutectic solvents in drug discovery and drug delivery systems. J Control Release 2019; 316:168-195. [DOI: 10.1016/j.jconrel.2019.09.019] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 09/23/2019] [Accepted: 09/23/2019] [Indexed: 01/02/2023]
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21
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Bioavailability and biological effects of bioactive compounds extracted with natural deep eutectic solvents and ionic liquids: advantages over conventional organic solvents. Curr Opin Food Sci 2019. [DOI: 10.1016/j.cofs.2019.03.002] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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