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Liu C, Xu L, Deng J, Tian J, Wang D, Xue K, Zhang X, Wang Y, Fang J, Liu J. A review of flotation reagents for bastnäsite-(Ce) rare earth ore. Adv Colloid Interface Sci 2023; 321:103029. [PMID: 37866120 DOI: 10.1016/j.cis.2023.103029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 10/08/2023] [Accepted: 10/15/2023] [Indexed: 10/24/2023]
Abstract
Given the indispensability and immense value of rare earth elements for scientific and technological advancements in the 21st century, extracting high-quality rare earth resources from nature has become a global priority. Bastnäsite-(Ce) is one of the known rare earth minerals with high rare earth content and wide distribution, which occupies a pivotal position in human life and high-end production activities, making its efficient development and utilization crucial. In recent years, research on separating bastnäsite-(Ce) from gangue minerals has focused on the flotation process, with flotation reagents playing a critical role in achieving effective separation. This paper provides a detailed summary of current research on the behavior of bastnäsite-(Ce) flotation agents on minerals, their interaction with mineral surfaces during flotation separation, and outlines future prospects for further research.
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Affiliation(s)
- Chang Liu
- Key Laboratory of Separation and Processing of Symbiotic-Associated Mineral Resources in Non-ferrous Metal Industry, Engineering Technology Research Center for Comprehensive Utilization of Rare Earth - Rare Metal - Rare Scattered in Non-ferrous Metal Industry, Inner Mongolia Research Institute, School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China; Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
| | - Longhua Xu
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China.
| | - Jiushuai Deng
- Key Laboratory of Separation and Processing of Symbiotic-Associated Mineral Resources in Non-ferrous Metal Industry, Engineering Technology Research Center for Comprehensive Utilization of Rare Earth - Rare Metal - Rare Scattered in Non-ferrous Metal Industry, Inner Mongolia Research Institute, School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Jia Tian
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
| | - Donghui Wang
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China; State Key Laboratory of Mineral Processing, Beijing 100160, China
| | - Kai Xue
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
| | - Xi Zhang
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
| | - Yan Wang
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
| | - Jinmei Fang
- Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
| | - Jiongtian Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
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Marion C, Li R, Waters KE. A review of reagents applied to rare-earth mineral flotation. Adv Colloid Interface Sci 2020; 279:102142. [PMID: 32244063 DOI: 10.1016/j.cis.2020.102142] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 10/24/2022]
Abstract
The rare-earth elements (REE), which encompass the fifteen metallic elements of the lanthanoid series of the periodic table, yttrium and occasionally scandium, have gained enormous public, economic and scientific attention in recent years. These elements, which have been found in over 250 minerals, are of high economic and strategic importance to many high-technology industries. As such they have been designated as critical materials by several countries and many new deposits are being developed. Rare-earth mineral (REM) deposits can be broadly classified into four geological environments: carbonates, alkaline/peralkaline igneous rocks, placers and ion adsorption clays. Apart from ion adsorption clay deposits, which require no mineral processing steps, froth flotation is the most applied beneficiation technique. This paper reviews the flotation of REM, covering their surface chemical properties as well as the various flotation reagents which have been employed.
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Alaimo AA, Koumousi ES, Cunha-Silva L, McCormick LJ, Teat SJ, Psycharis V, Raptopoulou CP, Mukherjee S, Li C, Gupta SD, Escuer A, Christou G, Stamatatos TC. Structural Diversities in Heterometallic Mn–Ca Cluster Chemistry from the Use of Salicylhydroxamic Acid: {MnIII4Ca2}, {MnII/III6Ca2}, {MnIII/IV8Ca}, and {MnIII8Ca2} Complexes with Relevance to Both High- and Low-Valent States of the Oxygen-Evolving Complex. Inorg Chem 2017; 56:10760-10774. [DOI: 10.1021/acs.inorgchem.7b01740] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alysha A. Alaimo
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, L2S 3A1 St. Catharines, Ontario, Canada
| | | | - Luís Cunha-Silva
- REQUIMTE-LAQV & Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Laura J. McCormick
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Simon J. Teat
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Vassilis Psycharis
- Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, 15310 Agia Paraskevi, Attikis, Greece
| | - Catherine P. Raptopoulou
- Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, 15310 Agia Paraskevi, Attikis, Greece
| | - Shreya Mukherjee
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Chaoran Li
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Sayak Das Gupta
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Albert Escuer
- Departament
de Quimica Inorganica and Institut de Nanociencia i Nanotecnologia
(IN2UB), Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Theocharis C. Stamatatos
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, L2S 3A1 St. Catharines, Ontario, Canada
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AGNES at vibrated gold microwire electrode for the direct quantification of free copper concentrations. Anal Chim Acta 2016; 920:29-36. [PMID: 27114220 DOI: 10.1016/j.aca.2016.03.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/09/2016] [Accepted: 03/23/2016] [Indexed: 11/23/2022]
Abstract
The free metal ion concentration and the dynamic features of the metal species are recognized as key to predict metal bioavailability and toxicity to aquatic organisms. Quantification of the former is, however, still challenging. In this paper, it is shown for the first time that the concentration of free copper (Cu(2+)) can be quantified by applying AGNES (Absence of Gradients and Nernstian equilibrium stripping) at a solid gold electrode. It was found that: i) the amount of deposited Cu follows a Nernstian relationship with the applied deposition potential, and ii) the stripping signal is linearly related with the free metal ion concentration. The performance of AGNES at the vibrating gold microwire electrode (VGME) was assessed for two labile systems: Cu-malonic acid and Cu-iminodiacetic acid at ionic strength 0.01 M and a range of pH values from 4.0 to 6.0. The free Cu concentrations and conditional stability constants obtained by AGNES were in good agreement with stripping scanned voltammetry and thermodynamic theoretical predictions obtained by Visual MinteQ. This work highlights the suitability of gold electrodes for the quantification of free metal ion concentrations by AGNES. It also strongly suggests that other solid electrodes may be well appropriate for such task. This new application of AGNES is a first step towards a range of applications for a number of metals in speciation, toxicological and environmental studies for the direct determination of the key parameter that is the free metal ion concentration.
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Alaimo AA, Takahashi D, Cunha-Silva L, Christou G, Stamatatos TC. Emissive {Mn4IIICa} Clusters with Square Pyramidal Topologies: Syntheses and Structural, Spectroscopic, and Physicochemical Characterization. Inorg Chem 2014; 54:2137-51. [DOI: 10.1021/ic502492x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Alysha A. Alaimo
- Department of Chemistry, Brock University, St. Catharines L2S 3A1, Ontario, Canada
| | - Daisuke Takahashi
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Luís Cunha-Silva
- REQUIMTE & Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - George Christou
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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Árus D, Nagy NV, Dancs Á, Jancsó A, Berkecz R, Gajda T. A minimalist chemical model of matrix metalloproteinases--can small peptides mimic the more rigid metal binding sites of proteins? J Inorg Biochem 2013; 126:61-9. [PMID: 23787141 DOI: 10.1016/j.jinorgbio.2013.05.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 05/27/2013] [Accepted: 05/27/2013] [Indexed: 11/24/2022]
Abstract
In order to mimic the active center of matrix metalloproteinases (MMPs), we synthesized a pentadecapeptide (Ac-KAHEFGHSLGLDHSK-NH2) corresponding to the catalytic zinc(II) binding site of human MMP-13. The multi-domain structural organization of MMPs fundamentally determines their metal binding affinity, catalytic activity and selectivity. Our potentiometric, UV-visible, CD, EPR, NMR, mass spectrometric and kinetic studies are aimed to explore the usefulness of such flexible peptides to mimic the more rigid metal binding sites of proteins, to examine the intrinsic metal binding properties of this naked sequence, as well as to contribute to the development of a minimalist, peptide-based chemical model of MMPs, including the catalytic properties. Since the multiimidazole environment is also characteristic for copper(II), and recently copper(II) containing variants of MMPs have been identified, we also studied the copper(II) complexes of the above peptide. Around pH 6-7 the peptide, similarly to MMPs, offers a {3Nim} coordination binding site for both zinc(II) and copper(II). In the case of copper(II), the formation of amide coordinated species at higher pH abolished the analogy with the copper(II) containing MMP variant. On the other hand, the zinc(II)-peptide system mimics some basic features of the MMP active sites: the main species around pH7 (ZnH2L) possesses a {3Nim,H2O} coordination environment, the deprotonation of the zinc-bound water takes place near the physiological pH, it forms relatively stable ternary complexes with hydroxamic acids, and the species ZnH2L(OH) and ZnH2L(OH)2 have notable hydrolytic activity between pH7 and 9.
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Affiliation(s)
- Dávid Árus
- Bioinorganic Chemistry Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
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Farkas E, Szabó O. Co(II) and Co(III) hydroxamate systems: A solution equilibrium study. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.03.045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wiebke J, Weigand A, Weissmann D, Glorius M, Moll H, Bernhard G, Dolg M. Combined Computational and Experimental Study of Uranyl(VI) 1:2 Complexation by Aromatic Acids. Inorg Chem 2010; 49:6428-35. [DOI: 10.1021/ic902496u] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jonas Wiebke
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| | - Anna Weigand
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| | - Daniel Weissmann
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| | - Maja Glorius
- Forschungszentrum Dresden−Rossendorf e.V., Institut für Radiochemie, P.O. Box 510119, D-01314 Dresden, Germany
| | - Henry Moll
- Forschungszentrum Dresden−Rossendorf e.V., Institut für Radiochemie, P.O. Box 510119, D-01314 Dresden, Germany
| | - Gert Bernhard
- Forschungszentrum Dresden−Rossendorf e.V., Institut für Radiochemie, P.O. Box 510119, D-01314 Dresden, Germany
| | - Michael Dolg
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
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Glorius M, Moll H, Bernhard G. Complexation of curium(III) with hydroxamic acids investigated by time-resolved laser-induced fluorescence spectroscopy. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.04.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Complexation of uranium(VI) with aromatic acids such as hydroxamic and benzoic acid investigated by TRLFS. J Radioanal Nucl Chem 2008. [DOI: 10.1007/s10967-007-7082-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Paunovic I, Schulin R, Nowack B. Evaluation of immobilized metal-ion affinity chromatography for the fractionation of natural Cu complexing ligands. J Chromatogr A 2005; 1100:176-84. [PMID: 16223503 DOI: 10.1016/j.chroma.2005.09.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2005] [Revised: 09/19/2005] [Accepted: 09/23/2005] [Indexed: 11/15/2022]
Abstract
An immobilized metal-ion affinity chromatography (IMAC) method has been developed and validated for the separation of copper complexing ligands from soil solution. We first investigated the retention behavior of simple model ligands on the IMAC column and found that the ability to form ternary complexes of the structure Cu-IDA-ligand was the dominant factor influencing ligand retention on the IMAC column. The logK value of the Cu-complex was found to have only a minor influence on the retention. Legends containing only carboxylic acid functional groups were not retained on the column. To optimize reproducibility and quantitative recovery of copper ligands from soil solution, different composition and pH values of eluting buffer were tested. Soil solution chromatograms exhibited one non-retained fraction and two retained fractions. The elution times of the retained fractions were characteristic of peptides and proteins (first peak) and for compounds containing aromatic amines (second peak). The results show that IMAC is an effective tool for the fractionation of copper complexing ligands that are capable of forming ternary complexes.
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Affiliation(s)
- Irena Paunovic
- Institute of Terrestrial Ecology, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
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Erk B, Dilmac A, Baran Y, Balaban A. Preparation, Characterization and Kinetics of Formation of Some Schiff Base Chelates of Sn(II) and UO2(V1). ACTA ACUST UNITED AC 2000. [DOI: 10.1080/00945710009351879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Bugella-Altamirano E, González-Pérez J, Sicilia Zafra A, Niclós-Gutiérrez J, Castiñeiras-Campos A. Metal chelates of N-carbamoylmethyl-iminodiacetate(2−) ion. Polyhedron 2000. [DOI: 10.1016/s0277-5387(00)00547-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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O'Brien EC, Farkas E, Gil MJ, Fitzgerald D, Castineras A, Nolan KB. Metal complexes of salicylhydroxamic acid (H2Sha), anthranilic hydroxamic acid and benzohydroxamic acid. Crystal and molecular structure of [Cu(phen)2(Cl)]Cl x H2Sha, a model for a peroxidase-inhibitor complex. J Inorg Biochem 2000; 79:47-51. [PMID: 10830846 DOI: 10.1016/s0162-0134(99)00245-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Stability constants of iron(III), copper(II), nickel(II) and zinc(II) complexes of salicylhydroxamic acid (H2Sha), anthranilic hydroxamic acid (HAha) and benzohydroxamic acid (HBha) have been determined at 25.0 degrees C, I=0.2 mol dm(-3) KCl in aqueous solution. The complex stability order, iron(III) >> copper(II) > nickel(II) approximately = zinc(II) was observed whilst complexes of H2Sha were found to be more stable than those of the other two ligands. In the preparation of ternary metal ion complexes of these ligands and 1,10-phenanthroline (phen) the crystalline complex [Cu(phen)2(Cl)]Cl x H2Sha was obtained and its crystal structure determined. This complex is a model for hydroxamate-peroxidase inhibitor interactions.
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Affiliation(s)
- E C O'Brien
- Department of Chemistry, Royal College of Surgeons in Ireland, Dublin
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O'Brien EC, Le Roy S, Levaillain J, Fitzgerald DJ, Nolan KB. Metal complexes of salicylhydroxamic acid and O-acetylsalicylhydroxamic acid. Inorganica Chim Acta 1997. [DOI: 10.1016/s0020-1693(97)05536-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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