Supercritical Fluid Extraction of Radionuclides: A Green Technology for Nuclear Waste Management

2006 ◽  
pp. 161-170 ◽  
Author(s):  
Chien M. Wai
Keyword(s):  
Waste Management ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Nuclear Waste ◽  
Green Technology ◽  
Nuclear Waste Management ◽  
Fluid Extraction ◽  
Extraction Of Radionuclides

Extraction of Actinides and Lanthanides by Supercritical Fluid

2010 ◽  
Vol 133 (5) ◽  
Author(s):  
Liyang Zhu ◽  
Wuhua Duan ◽  
Jingming Xu ◽  
Yongjun Zhu
Keyword(s):  
Waste Management ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Nuclear Waste ◽  
Industrial Application ◽  
Chemical Engineering ◽  
Liquid Waste ◽  
Nuclear Waste Management ◽  
Fluid Extraction ◽  
Extraction Technology

Reprocessing of used nuclear fuel and nuclear waste management are important issues for the sustainable development of nuclear energy. It is necessary to develop novel nuclear waste treatment technologies to meet the goal of minimizing the secondary liquid waste. Supercritical fluids are considered green solvents in chemical engineering process. Moreover, extraction of metal ions by supercritical fluid is achieved. It gains growing interest to treat nuclear waste using supercritical fluid extraction recently because it can greatly decrease the secondary liquid waste with high radioactivity. During the past 2 decades, extraction of actinides and lanthanides by supercritical fluid has been intensively studied in many countries, and many important progresses have been made. However, the prospect of industrial application of supercritical fluid extraction technology in nuclear waste management is still unclear. In this paper, extraction of actinides and lanthanides from various matrices or from their oxides by supercritical fluid including the experimental results, extraction mechanism, and kinetic process was reviewed. The engineering demonstration projects were introduced. The trend of industrial application of supercritical fluid extraction technology in nuclear waste management was also discussed.

Enzyme-assisted supercritical fluid extraction: an alternative and green technology for non-extractable polyphenols

2017 ◽  
Vol 409 (14) ◽  
pp. 3645-3655 ◽  
Author(s):  
Muhammad Mushtaq ◽  
Bushra Sultana ◽  
Sumia Akram ◽  
Farooq Anwar ◽  
Ahmad Adnan ◽  
...  
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Green Technology ◽  
Fluid Extraction

scholarly journals The Influence of Plant Material Enzymatic Hydrolysis and Extraction Conditions on the Polyphenolic Profiles and Antioxidant Activity of Extracts: A Green and Efficient Approach

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2074 ◽  
Author(s):  
Aneta Krakowska-Sieprawska ◽  
Katarzyna Rafińska ◽  
Justyna Walczak-Skierska ◽  
Bogusław Buszewski
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Fold Increase ◽  
Green Technology ◽  
Yerba Mate ◽  
Fluid Extraction ◽  
Agricultural Industry ◽  
Lupine Seed ◽  
Chemical Profiles ◽  
Yellow Lupine

The aim of this study was to develop a new comprehensive extraction protocol based on green technology for the enhanced release of polyphenolic compounds from plant cells. In this work, extracts from yerba mate and yellow lupine seed were obtained by using three different extraction techniques: maceration, supercritical fluid extraction with co-solvent (SFE) and enzyme assisted-supercritical fluid extraction with co-solvent (EA-SFE). Several experimental parameters such as time, type of solvent and co-solvent as well as CO2 flow rate were selected to obtain the highest extraction efficiency. The chemical profiles in the obtained extracts and their biological activity were evaluated. HPLC-MS/MS analysis indicated that the level of phenolic compounds in extracts from yerba mate obtained by EA-SFE was approximately five times higher than for maceration and 3.2 times higher than for SFE. In the case of extracts from yellow lupine seed an approximately 5.6-fold increase was observed in comparison with maceration and SFE with 96% MeOH, and 2.9 times for SFE with 96% EtOH. The developed protocol with a mix of enzymes commonly applied in the agricultural industry significantly raises the efficiency of liberation of secondary metabolites.

Extraction of Actinides and Lanthanides by Supercritical Fluid

2010 ◽  
Author(s):  
Liyang Zhu ◽  
Wuhua Duan ◽  
Jingming Xu ◽  
Yongjun Zhu
Keyword(s):  
Supercritical Fluid Extraction ◽  
Nuclear Fuel ◽  
Supercritical Fluid ◽  
Nuclear Waste ◽  
Industrial Application ◽  
Chemical Engineering ◽  
Liquid Waste ◽  
Fluid Extraction ◽  
Extraction Technology ◽  
Used Nuclear Fuel

Reprocessing of used nuclear fuel and treatment of nuclear waste are important issues for the sustainable development of nuclear energy. It is necessary to develop novel nuclear waste treatment technologies to meet the goal of minimizing the secondary liquid waste. Supercritical fluids are considered green solvents in chemical engineering process. It gains growing interest to treat nuclear waste using supercritical fluid extraction recently, because it can greatly decrease the secondary liquid waste with high radioactivity. During the past two decades, extraction of actinides and lanthanides by supercritical fluid has been intensively studied in some countries, and many important progresses have been made. However, the prospect of industrial application of supercritical fluid extraction technology in reprocessing of used nuclear fuel and treatment of nuclear waste is still unclear. In this paper, extraction of actinides and lanthanides from various matrixes or from their oxides by supercritical fluid including the experimental results, extraction mechanism and kinetic process was reviewed. The engineering demonstration projects were introduced. The trend of industrial application of supercritical fluid extraction technology in nuclear waste management was also discussed.

scholarly journals Promising Green Technology in Obtaining Functional Plant Preparations: Combined Enzyme-Assisted Supercritical Fluid Extraction of Flavonoids Isolation from Medicago Sativa Leaves

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2724
Author(s):  
Aneta Krakowska-Sieprawska ◽  
Katarzyna Rafińska ◽  
Justyna Walczak-Skierska ◽  
Anna Kiełbasa ◽  
Bogusław Buszewski
Keyword(s):  
Medicago Sativa ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Plant Material ◽  
Free Radical Scavenger ◽  
Polyphenolic Compounds ◽  
Green Technology ◽  
Biologically Active ◽  
Radical Scavenger ◽  
Fluid Extraction

To elaborate a complete extraction protocol for the enhanced release of biologically active compounds from plant cells, this study aimed to optimize together the parameters of the supercritical fluid extraction (SFE) process (temperature, pressure, and percentage of cosolvent) and enzymatic treatment of plant material (pH, enzyme concentration, time, and temperature) by response surface methodology (RSM). Medicago sativa L. was selected as a plant material due to its richness in phenolics and flavonoids. HPLC-MS/MS analysis allowed evaluating the content of individual bioactive compounds in obtained extracts. The total content of polyphenolic compounds in the extract obtained after two-step optimization was much higher (546 ± 21 µg/g) than in the extract obtained from non-hydrolyzed material (275 ± 23 µg/g) and in the extract obtained by maceration (162 ± 20 µg/g). Furthermore, it was evidenced that extract with the highest content of polyphenolic compounds can support the cellular antioxidant system both as a free radical scavenger and by stimulating the antioxidant enzyme system.

scholarly journals Economic evaluation of herb extraction using supercritical fluid

2009 ◽  
Vol 15 (3) ◽  
pp. 143-148 ◽  
Author(s):  
Mojtaba Shariaty-Niassar ◽  
Behdad Aminzadeh ◽  
Pouya Azadi ◽  
Saeed Soltanali
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Steam Distillation ◽  
Feasibility Studies ◽  
Green Technology ◽  
Environmental Conservation ◽  
Fluid Extraction ◽  
Economical Analysis ◽  
New Methods ◽  
Procedural Method

Due to the climate diversity in different parts of Iran, a variety of plants grow across the country, many of them having pharmaceutical applications. At present, only a few companies are producing herbal essence, all of them are technically based on conventional methods of extraction such as steam distillation and others. Because of the current serious concern with respect to the environmental conservation law the use of green technology seems imperative. The supercritical fluid extraction is considered as a practical and procedural method which has become under serious consideration in recent years. For this, an economical analysis is made of herb extractions using a supercritical fluid. The results of such a survey can clarify the new methods to be of great concern. The aim of this paper is to present the feasibility studies of supercritical fluid extraction units used for producing a different plant extract and especially that of rosemary.

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