Article
Engineering, Chemical
G. T. Mohanraj, M. R. Rahman, S. B. Arya, Ranju Barman, P. Krishnendu, Sher Singh Meena
Summary: This study conducted characterization studies on low grade copper ore and optimized the leaching parameters and solvent extraction method to achieve efficient copper recovery.
ADVANCED POWDER TECHNOLOGY
(2022)
Review
Engineering, Chemical
Guilhem Arrachart, Julien Couturier, Sandrine Dourdain, Clement Levard, Stephane Pellet-Rostaing
Summary: Rare earth elements play crucial roles in advanced technologies, making the development of optimized processes for their recovery necessary. Ionic solvents, including ionic liquids and deep-eutectic solvents, have attracted much attention as an alternative to conventional processes for metal recovery. Significant studies in the last decade regarding the recovery of REEs are presented in this review.
Article
Engineering, Chemical
Kuifang Zhang, Bohan Wei, Jinzhang Tao, Xiaocong Zhong, Wei Zhu, Ruixiang Wang, Zhiqiang Liu
Summary: A novel method for the recovery of rare earth elements from deep-sea mud is proposed in this study. The optimized leaching conditions achieved high extraction percentages of REEs, and the subsequent separation and purification process successfully recovered a significant amount of REEs as highly enriched oxide.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
Tushar Gupta, Ahmad Nawab, Rick Honaker
Summary: In the metallurgical extraction of rare earth elements, the study investigated the removal of iron contamination from the feed by calcination followed by magnetic separation. The results showed that calcination at 400°C and magnetic removal at a field strength of 1.15 Tesla resulted in the rejection of 81% of the iron. Acid leaching tests showed higher iron recovery in the magnetic fraction compared to the untreated feed and non-magnetic fraction. However, the comparison of leachate elemental concentrations indicated that the magnetic removal step was unfavorable due to the slight reduction in iron content and REE loss.
Article
Environmental Sciences
Sabrina F. Lutke, Marcos L. S. Oliveira, Samuel R. Waechter, Luis F. O. Silva, Tito R. S. Cadaval, Fabio A. Duarte, Guilherme L. Dotto
Summary: This study investigates the leaching conditions and mechanisms of rare earth elements (REE) from phosphogypsum (PG). Through experimental design and optimization, high leaching efficiency values were obtained using sulfuric acid at a concentration of 2.9 mol L-1, a solid/liquid ratio of 1.7/20 g mL(-1), and a temperature of 55 C. The leaching kinetics results indicated that most REE reached equilibrium in about 20 minutes, and the mechanism investigation suggested that surface chemical reaction and diffusion through the boundary layer controlled the leaching process.
Article
Engineering, Environmental
Ghazaleh Shakiba, Roozbeh Saneie, Hadi Abdollahi, Ehsan Ebrahimi, Ali Rezaei, Mohsen Mohammadkhani
Summary: In this paper, deep eutectic solvents (DESs) were applied as a green replacement for conventional solvents in the leaching process of REEs from monazite. The DES comprised of 2ChCl:1PTSA exhibited the highest extraction efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Tushar Gupta, Ahmad Nawab, Rick Honaker
Summary: This study investigated the potential of low-temperature plasma oxidation as a pre-treatment method to improve rare earth element (REE) leachability from coal sources. The results showed that low-temperature plasma oxidation improved the leaching characteristics of REEs, especially heavy rare earth elements (HREEs) in the lighter density fractions of the coal samples.
Article
Materials Science, Multidisciplinary
Amilton Barbosa Botelho Junior, Denise Crocce Romano Espinosa, James Vaughan, Jorge Alberto Soares Tenorio
Summary: The European Union and several countries/regions have classified rare-earth elements (REEs) as critical due to supply interruption risks. The demand for REEs has led to increased interest in forgotten reserves. This study developed a new approach for extracting REEs from silicate-based ore and achieved promising results.
Article
Engineering, Chemical
Hossein Habibi, Mohammad Mokmeli, Sina Shakibania, Dorna Pirouzan, Ziaeddin Pourkarimi
Summary: In this study, a complete process for the recovery of titanium and rare earth elements (REEs) from red mud was developed. The process consists of four main stages: sample preparation, leaching, hydrolysis, and solvent extraction. The proposed process showed high efficiency in the dissolution and concentration of titanium and Sc, with the potential to be considered industrially due to its simplicity, high recovery yield, and utilization of low-cost reagents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Sadia Ilyas, Hyunjung Kim, Rajiv Ranjan Srivastava
Summary: The study examined the hydrometallurgical recycling of cerium from exhausted auto-catalyst secondary residue. By introducing HF into a 2.0 mol/L H2SO4 solution, cerium dissolution was significantly improved. Using Cyanex 923, high-purity cerium precipitate was obtained.
Article
Chemistry, Inorganic & Nuclear
Pankaj Kumar Parhi, Pramila Kumari Misra, Rajesh Kumar Jyothi
Summary: The Nd-Fe-B permanent magnet was processed using a hydrometallurgical approach to recover neodymium. The leaching kinetics of neodymium using dilute HCl was studied, and the process optimization was investigated. The obtained leach liquor was used for the recovery of Fe2O3 using slaked lime, and a bifunctional ionic liquid was introduced for the extraction of REMs (Nd and Pr) from the solution. The enriched neodymium oxalate was obtained through calcination of the stripping circuit product.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Tommee Larochelle, Aaron Noble, Kris Strickland, Allie Ahn, Paul Ziemkiewicz, James Constant, David Hoffman, Caitlin Glascock
Summary: This study compares the performance of traditional extractants and ionic liquids for the recovery of rare earth elements from acid mine drainage, finding that [c101][C572] performs better. Recommendations for further research on [c101][C572] include stripping tests, continuous pilot testing, and techno-economic analysis.
Review
Biochemistry & Molecular Biology
Laura Castro, Maria Luisa Blazquez, Felisa Gonzalez, Jesus angel Munoz
Summary: Biohydrometallurgy, a method of recovering metals through microbially mediated processes, has gained attention for extracting critical resources such as rare earth elements. The interest in rare earth elements is growing due to their applications in novel technologies and green economy, with biohydrometallurgy being used to extract resources from waste streams to support innovative mining and promote a circular economy.
Article
Metallurgy & Metallurgical Engineering
Raphael Cruz Alves, Marisa Nascimento, Jessica Frontino Paulino, Julio Carlos Afonso
Summary: This work focuses on processing a monazite concentrate containing iron mineral phases to recover rare earth elements, with the alkaline conversion route showing the best combined recovery and selectivity results for lanthanum and iron. Various experimental designs were used to determine the key variables for each processing route, with temperature playing a significant role in all three routes.
Article
Energy & Fuels
Si-Bei Lu, Warmadewanthi, Jhy-Chern Liu
Summary: This study examined the leaching of rare earth elements (REEs) from phosphogypsum (PG) using subcritical water extraction. Under experimental conditions of 0.1 mol/L HCl, 10 g/L PG, 100 degrees C, 10 kg/cm2, and 5 min, complete leaching of REEs (Y, La, Ce, Nd) was achieved. Subcritical water extraction proved to be an efficient and environmentally friendly technology for the recovery of REEs from PG.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Review
Environmental Sciences
S. Pradhan, R. Nayak, S. Mishra
Summary: The development of today's information-rich world relies on green technologies, with portable electronic devices playing a crucial role in information handling and communication. The widespread use of portable devices has made batteries an essential part of human life, increasing the demand for critical elements used in these devices. New approaches are being adopted to address supply challenges associated with metals used in portable electronic devices, with a focus on recovery and recycling efforts.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Susmita Prusty, Sanghamitra Pradhan, Sujata Mishra
Summary: Ionic liquids are potential extraction agents for rare earth metals such as Nd, Sm and Eu, showing interesting properties and high selectivity in liquid-liquid extraction. Their use in separation processes is based on ion exchange mechanism or neutral complexation pathway, depending on the type and functionalization of the ionic liquids.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Chemistry, Multidisciplinary
Nilam Swain, Sujata Mishra
Summary: This study aims to recycle rare earth and transition metals to reduce supply risks. Using organic solvent extraction achieved complete separation of samarium and cobalt. Experimental results show that 100% recovery of samarium can be achieved through specific conditions.
Review
Engineering, Chemical
Rakesh Kumar Sahu, Sanghamitra Pradhan, Sujata Mishra
Summary: Solvent extraction is an efficient technique for separating metal ions, utilizing their distribution between aqueous and organic phases. The physico-chemical properties of extractants and diluents play a crucial role in optimizing extraction conditions and evaluating extraction efficiency.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Susmita Prusty, Sanghamitra Pradhan, Sujata Mishra
Summary: In this study, solvent extraction of Nd (III), Sm (III), and Eu (III) using a bifunctional ionic liquid as extractant was successfully performed. The impact of various parameters on the extraction efficiency was investigated, and speciation analysis was carried out to determine the available metal species. The proposed extracted species was MHEDTA(TOA - D2) based on slope analysis and speciation studies.
Article
Chemistry, Multidisciplinary
Susmita Prusty, Sanghamitra Pradhan, Sujata Mishra
Summary: The study utilized bi-functional ionic liquid extractants to extract Nd(III), Sm(III), and Eu(III) from aqueous phase, with the highest extraction efficiency observed for Nd(III). The extraction percentages were analyzed under different conditions, with [TOAH](+)[OHex](-) showing higher extraction percentages compared to [TOAH](+)[ODec](-). The stripping process was quantitative with HNO3 and HCl, and speciation studies and FTIR spectra provided valuable information on the stoichiometry of the extracted species.
Article
Chemistry, Physical
Rakesh Kumar Sahu, Sanghamitra Pradhan, Sujata Mishra
Summary: In this study, the interaction between tri-n-octyl amine (TOA) and n-hexane was investigated by examining their physical and chemical properties at various temperatures. The results indicate that there is a limited interaction between these two components in the mixture, leading to a potentially efficient contribution towards metal solvent extraction.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Rakesh Kumar Sahu, Sanghamitra Pradhan, Sujata Mishra
Summary: The diluent has an impact on the interaction among the constituents during solvent extraction, and examining the physico-chemical properties can optimize the extraction conditions. The extraction efficiency is evaluated based on the interaction between extractant and diluent. Measurements of densities, dielectric constants, and refractive indices were conducted for the binary mixture of octanoic acid/tri-n-butyl phosphate (TBP) with n-hexane. The values were used to calculate molar polarization, molar refraction, correlation factor, and excess Gibbs free energy.
Article
Biotechnology & Applied Microbiology
Susmita Prusty, Sanghamitra Pradhan, Sujata Mishra
Summary: This study demonstrates the use of a novel deep eutectic solvent (DES) for the solvent extractive separation of Nd/Fe and Sm/Co from nitrate medium. The thermophysical attributes variations provide insight on their extraction behavior, DES efficiency, and separation feasibility. Complete separations of Nd(III)/Fe(III) and Sm(III)/Co(III) were achieved under multiple extraction conditions. Ali-Gly DES diluted in kerosene exhibited the highest selectivity for Nd, followed by Sm and Fe, without extracting cobalt.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Review
Integrative & Complementary Medicine
Sanghamitra Pradhan, Naresh Kumar Sahoo, Suryasatya Satapathy, Sujata Mishra
Summary: This paper provides an overview of the development of novel extraction techniques using choline chloride-based natural deep eutectic solvents for the extraction of flavonoids, secondary plant metabolites. It also reviews studies on the structural characterization and applications of flavonoids for the treatment of infections. Flavonoids possess diverse therapeutic properties, such as antioxidant and anti-inflammatory effects, and their comprehensive study is of great importance for understanding their therapeutic potential.
JOURNAL OF HERBAL MEDICINE
(2023)
Article
Engineering, Chemical
Sanghamitra Pradhan, Sujata Mishra
Summary: Neodymium is a critically scarce element used in sustainable technologies. Recycling end-of-life products is a viable alternative to its extraction from virgin ores. Magnets produced from recovered neodymium outperform those produced from virgin neodymium. This review discusses various technologies for neodymium recovery and summarizes their advantages and limitations, providing valuable insights for researchers in designing recovery strategies.
CHEMBIOENG REVIEWS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Itishree Panda, Sujata Mishra
Summary: This review analyzes the feasibility of using ionic liquids as green solvents for the recovery of heavy metal ions. Ionic liquids have advantages such as long-lasting and environmentally friendly properties, but there is still limited research and application in the field of hydrometallurgical methods. The parameters affecting the extraction efficiency in different extraction systems have been summarized.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Metallurgy & Metallurgical Engineering
Sanghamitra Pradhan, Muskan Ram, Sujata Mishra
Summary: With rapid economic progress worldwide, the demand for new material resources has become a top priority. The future demand for manganese alloys and compounds is expected to continue increasing, especially in the automotive and energy sectors where electrolytic manganese dioxide (EMD) is needed. Therefore, there is an urgent need to develop eco-friendly and efficient technologies for manganese production.
METALLURGICAL & MATERIALS ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Aishwarya Mishra, Nilam Swain, Sanghamitra Pradhan, Sujata Mishra
Summary: Cobalt criticality is increasing over time, and a strategy using tri-n-octylamine in kerosene for cobalt extraction has been developed. Potassium chloride was found to be beneficial for extraction, and high temperature favors the formation of extractable complexes.
JOURNAL OF METALS MATERIALS AND MINERALS
(2021)
Article
Engineering, Environmental
Ananya Jena, Sanghamitra Pradhan, Sujata Mishra, Naresh Kumar Sahoo
Summary: The study investigated the use of living cells of Deinococcus radiodurans for recovering Eu3+ from aquatic systems through biosorption. By evaluating various variables, it was found that the optimized conditions led to a removal efficiency of 81% for Eu3+ within 3 hours.
ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
