scholarly journals Use of Ionic Liquids and Deep Eutectic Solvents in Polysaccharides Dissolution and Extraction Processes towards Sustainable Biomass Valorization

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3652 ◽  
Author(s):  
Eduarda S. Morais ◽  
André M. da Costa Lopes ◽  
Mara G. Freire ◽  
Carmen S. R. Freire ◽  
João A. P. Coutinho ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Performance ◽  
Deep Eutectic Solvents ◽  
Selective Extraction ◽  
Development Stage ◽  
Ultrasound Assisted Extraction ◽  
Biomass Valorization ◽  
Advantages And Disadvantages ◽  
Extraction Processes ◽  
Food Residues

A shift to a bioeconomy development model has been evolving, conducting the scientific community to investigate new ways of producing chemicals, materials and fuels from renewable resources, i.e., biomass. Specifically, technologies that provide high performance and maximal use of biomass feedstocks into commodities with reduced environmental impact have been highly pursued. A key example comprises the extraction and/or dissolution of polysaccharides, one of the most abundant fractions of biomass, which still need to be improved regarding these processes’ efficiency and selectivity parameters. In this context, the use of alternative solvents and the application of less energy-intensive processes in the extraction of polysaccharides might play an important role to reach higher efficiency and sustainability in biomass valorization. This review debates the latest achievements in sustainable processes for the extraction of polysaccharides from a myriad of biomass resources, including lignocellulosic materials and food residues. Particularly, the ability of ionic liquids (ILs) and deep eutectic solvents (DESs) to dissolve and extract the most abundant polysaccharides from natural sources, namely cellulose, chitin, starch, hemicelluloses and pectins, is scrutinized and the efficiencies between solvents are compared. The interaction mechanisms between solvent and polysaccharide are described, paving the way for the design of selective extraction processes. A detailed discussion of the work developed for each polysaccharide as well as the innovation degree and the development stage of dissolution and extraction technologies is presented. Their advantages and disadvantages are also identified, and possible synergies by integrating microwave- and ultrasound-assisted extraction (MAE and UAE) or a combination of both (UMAE) are briefly described. Overall, this review provides key information towards the design of more efficient, selective and sustainable extraction and dissolution processes of polysaccharides from biomass.

scholarly journals Natural Deep Eutectic Solvents for Simultaneous Extraction of Multi-Bioactive Components from Jinqi Jiangtang Preparations

Pharmaceutics ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 18 ◽  
Author(s):  
Lele Yang ◽  
Ling Li ◽  
Hao Hu ◽  
Jianbo Wan ◽  
Peng Li
Keyword(s):  
High Performance ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Bioactive Components ◽  
Operational Parameters ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Natural Deep Eutectic Solvents ◽  
Quantification Analysis ◽  
Chemical Profiles

Natural deep eutectic solvents (NADESs), composed of natural primary metabolites, are now widely used as green and sustainable extraction solvents of bioactive components. In the present study, various NADESs were prepared to extract multi-components from different preparations of an herbal formula (Chinese name: Jinqi Jiangtang, JQJT) using ultrasound-assisted extraction (UAE). Results showed that most prepared NADESs provided more effective extraction of phenolic acids and alkaloids from JQJT preparations than conventional solvents. Among the tested NADESs, the solvent formed by choline chloride and laevulinic acid was selected to optimize the operational parameters using response surface methodology. The optimized extraction method was successfully applied to extract six major components in four commercial JQJT products, and quantification analysis was performed by the validated high-performance liquid chromatography with ultraviolet detection (HPLC-UV) method. The quantitative results indicated that preparations from different manufacturers showed different chemical profiles. In conclusion, NADESs-based UAE shows considerable potential as an efficient and green method for extraction of multi-bioactive components from commercial herbal preparations.

scholarly journals Biomass delignification with green solvents towards lignin valorisation: ionic liquids vs deep eutectic solvents

2021 ◽  
pp. 64-78
Author(s):  
André M. da Costa Lopes
Keyword(s):  
Ionic Liquids ◽  
Technology Development ◽  
Deep Eutectic Solvents ◽  
Environmental Benefits ◽  
Raw Material ◽  
Green Solvents ◽  
Advantages And Disadvantages ◽  
Biomass Fractionation ◽  
Cascade Processes ◽  
Biomass Valorisation

The use of renewable resources as feedstocks to ensure the production of goods and commodities for society has been explored in the last decades to switch off the overexploited and pollutant fossil-based economy. Today there is a strong movement to set bioeconomy as priority, but there are still challenges and technical limitations that must be overcome in the first place, particularly on biomass fractionation. For biomass to be an appellative raw material, an efficient and sustainable separation of its major components must be achieved. On the other hand, the technology development for biomass valorisation must follow green chemistry practices towards eco-friendly processes, otherwise no environmental leverage over traditional petrochemical technologies will be acquired. In this context, the application of green solvents, such as ionic liquids (ILs) and deep eutectic solvents (DES), in biomass fractionation is envisaged as promising technology that encompasses not only efficiency and environmental benefits, but also selectivity, which is a crucial demand to undertake cascade processes at biorefinery level. In particular, this article briefly discusses the disruptive achievements upon the application of ILs and DES in biomass delignification step towards an effective and selective separation of lignin from polysaccharides. The different physicochemical properties of these solvents, their interactions with lignin and their delignification capacity will be scrutinized, while some highlights will be given to the important characteristics of isolated lignin fractions for further valorisation. The advantages and disadvantages between ILs and DES in biomass delignification will be contrasted as well along the article.

scholarly journals Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1202
Author(s):  
Guilhem Arrachart ◽  
Julien Couturier ◽  
Sandrine Dourdain ◽  
Clément Levard ◽  
Stéphane Pellet-Rostaing
Keyword(s):  
Ionic Liquids ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
End Of Life ◽  
Mine Tailings ◽  
Industrial Waste ◽  
Deep Eutectic Solvents ◽  
Secondary Sources ◽  
Advanced Technologies ◽  
Extraction Processes

Rare earth elements (REEs) are becoming more and more significant as they play crucial roles in many advanced technologies. Therefore, the development of optimized processes for their recovery, whether from primary resources or from secondary sources, has become necessary, including recovery from mine tailings, recycling of end-of-life products and urban and industrial waste. Ionic solvents, including ionic liquids (ILs) and deep-eutectic solvents (DESs), have attracted much attention since they represent an alternative to conventional processes for metal recovery. These systems are used as reactive agents in leaching and extraction processes. The most significant studies reported in the last decade regarding the recovery of REEs are presented in this review.

scholarly journals Deep Eutectic Solvents for Pretreatment, Extraction, and Catalysis of Biomass and Food Waste

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4012 ◽  
Author(s):  
Payam Kalhor ◽  
Khashayar Ghandi
Keyword(s):  
Ionic Liquids ◽  
Lignocellulosic Biomass ◽  
Food Waste ◽  
Deep Eutectic Solvents ◽  
Modern World ◽  
Great Promise ◽  
Natural Deep Eutectic Solvents ◽  
Extraction Solvents ◽  
Food Residues ◽  
Biobased Economy

Valorization of lignocellulosic biomass and food residues to obtain valuable chemicals is essential to the establishment of a sustainable and biobased economy in the modern world. The latest and greenest generation of ionic liquids (ILs) are deep eutectic solvents (DESs) and natural deep eutectic solvents (NADESs); these have shown great promise for various applications and have attracted considerable attention from researchers who seek versatile solvents with pretreatment, extraction, and catalysis capabilities in biomass- and biowaste-to-bioenergy conversion processes. The present work aimed to review the use of DESs and NADESs in the valorization of biomass and biowaste as pretreatment or extraction solvents or catalysis agents.

scholarly journals Phytomass Valorization by Deep Eutectic Solvents—Achievements, Perspectives, and Limitations

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 800 ◽  
Author(s):  
Michal Jablonský ◽  
Jozef Šima
Keyword(s):  
Ionic Liquids ◽  
Plant Biomass ◽  
Value Added ◽  
Deep Eutectic Solvents ◽  
Green Solvents ◽  
Alphabetical Order ◽  
Biomass Waste ◽  
Production And Consumption ◽  
Original Plant ◽  
Extraction Processes

In recent years, a plethora of extraction processes have been performed by a novel class of green solvents known as deep eutectic solvents (DESs), possessing several environmental, operational, and economic advantages proven by experience when compared to organic solvents and ionic liquids. The present review provides an organized overview of the use of DESs as extraction agents for the recovery of valuable substances and compounds from the original plant biomass, waste from its processing, and waste from the production and consumption of plant-based food. For the sake of simplicity and speed of orientation, the data are, as far as possible, arranged in a table in alphabetical order of the extracted substances. However, in some cases, the isolation of several substances is described in one paper and they are, therefore, listed together. The table further contains a description of the extracted phytomass, DES composition, extraction conditions, and literature sources. With regard to extracted value-added substances, this review addresses their pharmacological, therapeutic, and nutritional aspects. The review also includes an evaluation of the possibilities and limitations of using DESs to obtain value-added substances from phytomass.

QuEChERS with ultrasound-assisted extraction combined with high-performance liquid chromatography for the determination of 16 polycyclic aromatic hydrocarbons in sediment

2021 ◽  
Author(s):  
Ling Wu ◽  
Qiurong He ◽  
Jing Zhang ◽  
Yongxin Li ◽  
Weiqing Yang ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
Ultrasound Assisted Extraction ◽  
Sediment Samples ◽  
Assisted Extraction ◽  
Polycyclic Aromatic ◽  
Ultrasound Assisted

Abstract Background Polycyclic aromatic hydrocarbons (PAHs) have attracted worldwide attention due to their carcinogenic, teratogenic and mutagenic effects, environmental persistence and bioaccumulation characteristics. Therefore, the sensitive, reliable and rapid detection of PAHs in sediment is of great importance. Objective To develop a high-performance liquid chromatography (HPLC) with fluorescence and ultraviolet detection after QuEChERS treatment for simultaneous determination of 16 U.S. Environmental Protection Agency priority PAHs in sediment samples. Methods The samples were ultrasonically extracted with acetone and then the supernatant was purified with a modified QuEChERS method. After centrifugation, the supernatant was injected into the HPLC system for analysis. The separation was accomplished on a ZORBAX Eclipse PAH column (150 × 4.6 mm, 3.5 μm) and the column temperature was set at 30 °C. The flow rate of the mobile phase consisting of water and acetonitrile in gradient elution mode was fixed at 0.9 mL/min. Detection was conducted on an ultraviolet detector and a fluorescence detector simultaneously. The qualitative analysis was based on retention time and the quantification was based on standard curves. Results Under the optimal conditions, this method showed good linearities in the range of 10–200 μg/L with correlation coefficients greater than 0.9993. The method had the limits of detection (LODs) ranging from 0.00108 to 0.314 ng/g. The mean recoveries ranged from 78.4 to 117% with the intra-day and inter-day relative standard deviations (RSDs) of 0.592–10.7 and 1.01–13.0%, respectively. The proposed method was successfully applied to the detection of 16 PAHs in sediment samples collected from the Funan River in Chengdu, China with the total contents of 431 to 2143 ng/g·dw. Conclusions The established method is simple, rapid, environment-friendly and cost- effective. It can be applied to the analysis of 16 PAHs in sediment samples. Highlights A method of QuEChERS with ultrasound-assisted extraction combined with HPLC has been established for the analysis of 16 PAHs in sediment samples and the proposed method has been successfully applied to the analysis PAHs in real sediment samples.

scholarly journals Inorganic Synthesis Using Reactions of Ionic Liquids and Deep Eutectic Solvents

2021 ◽  
Author(s):  
Tao Zhang ◽  
Thomas Doert ◽  
Hui Wang ◽  
Suojiang Zhang ◽  
Michael Ruck
Keyword(s):  
Ionic Liquids ◽  
Deep Eutectic Solvents ◽  
Inorganic Synthesis
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