scholarly journals Sustainable Bioleaching of Rare Earth Elements from Industrial Waste Materials Using Agricultural Wastes

2019 ◽  
Vol 7 (18) ◽  
pp. 15311-15319 ◽  
Author(s):  
Hongyue Jin ◽  
David W. Reed ◽  
Vicki S. Thompson ◽  
Yoshiko Fujita ◽  
Yongqin Jiao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Industrial Waste ◽  
Agricultural Wastes ◽  
Waste Materials

scholarly journals Techno-economic and Life Cycle Analysis for Bioleaching Rare-Earth Elements from Waste Materials

2017 ◽  
Vol 6 (2) ◽  
pp. 1602-1609 ◽  
Author(s):  
Vicki S. Thompson ◽  
Mayank Gupta ◽  
Hongyue Jin ◽  
Ehsan Vahidi ◽  
Matthew Yim ◽  
...  
Keyword(s):  
Rare Earth ◽  
Life Cycle ◽  
Rare Earth Elements ◽  
Life Cycle Analysis ◽  
Waste Materials

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 Phytochemical Characteristics Evaluation of Pleurotus species Cultivated on Agricultural Wastes in Chiro, Ethiopia

2021 ◽  
Author(s):  
Getachew Gashaw ◽  
Abebe Getu
Keyword(s):  
Industrial Waste ◽  
Food Source ◽  
Agricultural Wastes ◽  
Waste Materials ◽  
Total Phenolic ◽  
Aqueous Extracts ◽  
Methanolic Extracts ◽  
Pleurotus Species ◽  
Potential Sources ◽  
Qualitative Analyses

Background: Mushrooms are a nutritious food source, being rich in protein, vitamins and minerals. They are also contains substances that enhance the immune system, fight infectious disease. Mushrooms can be cultivated on a variety of substrates, including agricultural and agro-industrial waste materials. The current study was amid to evaluate the phytochemical characteristics of Pleurotus species cultivated on different agricultural wastes.Methods: Mushrooms Pleurotus ostreatus and Pleurotus florida were cultivated on different agricultural wastes for the screening of phytochemical characteristics. Qualitative analyses of the phytochemicals were evaluated in methanolic, ethanolic and aqueous extracts of both Pleurotus spp. Total phenolic and total flavonoid contents of the extracts were determined by using Folin-Ciocalteu method and Spectrophotometric method with aluminum chloride.Result: Qualitative analyses revealed the phytochemicals alkaloids, saponins, flavonoids and tannins were present in methanolic, ethanolic and aqueous extracts of both Pleurotus spp. while anthraquinones and Phlobatannins were absent in aqueous extracts. The highest concentration of phenols and flavonoids were recorded in methanolic extracts of P. ostreatus and P. florida (48.17 mg GAE/g of extract and 56.57 mg of RUE/g of extract and 46.73 mg GAE/g of extract and 55.58 mg of RUE/g of extract respectively). The results supported the methanolic extracts of P. ostreatus and P. florida might indeed be potential sources of phytochemicals. 

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth
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