1
|
Almohammed AH, Bhui UK, Ray D, Shukla AD, Madhavan N. Spectroscopic characterization of fluorite of Amba Dongar, Gujarat, India: Linking chemical composition with color. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 318:124464. [PMID: 38768538 DOI: 10.1016/j.saa.2024.124464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 05/06/2024] [Accepted: 05/12/2024] [Indexed: 05/22/2024]
Abstract
This work addresses the long-standing debate surrounding the origin of color variation in fluorite (CaF2) through a novel quantitative approach. By examining eight carefully selected fluorite samples having different hue of colors from the Amba Dongar mine in Gujarat, India, a rigorous quantitative analysis was conducted. This approach combined chemical compositional data and optical spectroscopic features to elucidate the relationship between elemental composition, concentration, and color variation in fluorite. Precise elemental concentration data for trace transition metals, alkali metals, and rare earth elements (REEs) were obtained through inductively coupled plasma mass spectroscopy (ICP-MS) analysis of powdered fluorite samples. Optical spectroscopic techniques, including UV-visible absorption, emission (photoluminescence and fluorescence), and Raman spectroscopy, were employed to capture characteristic spectral signatures for specific color of the study sample. The work unveils a strong correlation between specific elemental concentrations and observed spectral features, particularly influenced by alkaline metals, transition group elements, and REEs. Fluorite's optical absorption behavior lacks a clear pattern in UV and infrared wavelength ranges but correlates well with transition metal, alkaline element, and REE concentrations in visible wavelength regions, influencing coloration. Luminescent centers in the study fluorite samples correspond to specific REE concentrations, indicating a strong linkage between emission wavelengths with the presence of specific REE. UV-visible and fluorescence in fluorite result from trivalent REE or Eu2+ ions, with emission intensity affected by REE concentration and specific REE or combinations thereof. Raman spectroscopy identifies characteristic modes related to F-substitution and REE impurities, providing insights into fluorite's structural composition. This quantitative correlation between elemental composition and spectroscopic characteristics represents a novel contribution for understanding color variation mechanisms in fluorite. The comprehensive analysis of this present work underscores the intricate interplay of mineral composition, and element concentration particularly alkaline metals, transition group elements, and REEs, for variation in spectral signatures with variation in fluorite's visual attributes.
Collapse
Affiliation(s)
- Ali H Almohammed
- Department of Petroleum Engineering, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India; Applied Geology Department, Al-Baath University, Homs, Syria
| | - Uttam K Bhui
- Department of Petroleum Engineering, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India.
| | - Dwijesh Ray
- Geosciences Division, Physical Research Laboratory, Navarangpura, Ahmedabad - 380 009, Gujarat, India
| | - Anil D Shukla
- Geosciences Division, Physical Research Laboratory, Navarangpura, Ahmedabad - 380 009, Gujarat, India; Hemvati Nandan Bahuguna University Srinagar, Garhwal -246174
| | - N Madhavan
- Department of Petroleum Engineering, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India
| |
Collapse
|
2
|
Cao S, Li Y, Wu X, Li W, Yang X. Efficient recovery of highly pure CaF 2 from fluorine-containing wastewater using an icy lime solution. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2024; 90:32-44. [PMID: 39007305 DOI: 10.2166/wst.2024.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 06/07/2024] [Indexed: 07/16/2024]
Abstract
Developing a feasible and low-cost strategy for the recovery of calcium fluoride efficiently from fluoride-containing wastewater is very essential for the recycle of fluoride resources. Herein, a modified lime precipitation method was employed to recover CaF2 from fluorinated wastewater using a special icy lime solution. Intriguingly, the highest F- removal was greater than 95% under the optimal condition, leaving a fluoride concentration from 200 to 8.64 mg/L, while the lime dosage was much lower than that of industry. Importantly, spherical-shaped CaF2 particles with a 93.47% purity and size smaller than 600 nm were recovered, which has a high potential for the production of hydrofluoric acid. Besides, the precipitation was significantly affected by Ca/F molar ratio, stirring time, temperature, and solution pH. Furthermore, the thermodynamics and kinetics were investigated in detail to reveal the crystallization process. As a result, the defluorination reaction followed the pseudo-second order reaction kinetics model. Also, CO2 in the air adversely influenced the CaF2 purity. Based on this facile method, a high lime utilization efficiency was applied to defluorination, which contributed to protecting the environment and saving costs. This study, therefore, provides a feasible approach for the green recovery of fluorine resources and has significance for related research.
Collapse
Affiliation(s)
- Shuqin Cao
- Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan, Hubei 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| | - Yubiao Li
- Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan, Hubei 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Xiaoyong Wu
- Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan, Hubei 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| | - Wanqing Li
- Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan, Hubei 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| | - Xu Yang
- Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan, Hubei 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| |
Collapse
|
3
|
Wu H, Zhang C, Zhang J, Wang C, Chen P, Wang S. Investigating the Mechanism of Diethylenetriamine Pentamethylene Phosphonic Acid as a Depressant for Calcite Flotation of Fluorite. ACS OMEGA 2024; 9:17354-17367. [PMID: 38645314 PMCID: PMC11025071 DOI: 10.1021/acsomega.3c10400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/18/2024] [Accepted: 03/27/2024] [Indexed: 04/23/2024]
Abstract
Fluorite and calcite have been attracting research attention for a long time. This paper reports on an investigation of the use of diethylene triamine pentamethylphosphonic acid (DTPMPA) as a chelating inhibitor. DTPMPA was used as a chelating inhibitor to study the flotation, separation, and adsorption behaviors of fluorite and calcite minerals. The microflotation experiment showed that the maximum separation of fluorite and calcite can be achieved with a DTPMPA dosage of 1.5 × 10-4 mol/L under weakly alkaline conditions (pH = 8). Zeta potential measurement, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to confirm that DTPMPA was adsorbed on the surface of calcite, inhibiting NaOl adsorption. Additionally, density functional theory calculations showed that oxygen in the DTPMPA phosphate group formed the most stable bidentate binuclear adsorption configuration by chelating with calcium on the calcite surface. Through detection analysis and simulation calculations, the results showed that DTPMPA exhibited significantly weaker adsorption on fluorite compared to that on calcite, highlighting its selective inhibition ability on calcite.
Collapse
Affiliation(s)
- Haijun Wu
- College
of Environmental and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China
- School
of Mining and Mechanical Engineering, Liupanshui
Normal University, Liupanshui, Guizhou 553004, China
| | - Chenhu Zhang
- School
of Mining and Mechanical Engineering, Liupanshui
Normal University, Liupanshui, Guizhou 553004, China
| | - Jing Zhang
- College
of Environmental and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China
| | - Chengyong Wang
- School
of Mining and Mechanical Engineering, Liupanshui
Normal University, Liupanshui, Guizhou 553004, China
| | - Peng Chen
- School
of Mining and Mechanical Engineering, Liupanshui
Normal University, Liupanshui, Guizhou 553004, China
| | - Shiwei Wang
- School
of Mining and Mechanical Engineering, Liupanshui
Normal University, Liupanshui, Guizhou 553004, China
| |
Collapse
|
4
|
Liu P, Zhao Y, Wang X, Ni J, Dai Z. Study on lattice dynamics and thermal conductivity of fluorite AF 2 (A = Ca, Sr, Ba) based on first principles calculations. Phys Chem Chem Phys 2024; 26:10868-10879. [PMID: 38525602 DOI: 10.1039/d4cp00201f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Fluorite materials have received particular attention in electron optics due to their favorable optical properties. However, further exploration of these materials in the thermoelectric (TE) field is hampered by the lack of studies on their lattice thermal transport properties. In this work, we use first-principles calculations, combined with self-consistent phonon theory, compressive sensing lattice dynamics and the Boltzmann transport equation, to study the microscopic mechanism of lattice thermal transport properties in AF2 (A = Ca, Sr, Ba) with a fluorite structure. We investigate the effects of three-phonon and four-phonon scattering and quartic anharmonic renormalization of phonon frequencies on this system. The results show that the bonding strength of atoms A (Ca, Sr, and Ba) plays an important role in the thermal transport process, and the third-order anharmonicity also plays an important role in this system. Meanwhile, the role of the quartic anharmonicity cannot be ignored. Our findings not only fill in the gaps in the study of lattice thermal transport of fluorite materials, but also deepen the comprehensive understanding of the high κL value of fluorite materials.
Collapse
Affiliation(s)
- Peipei Liu
- Department of Physics, Yantai University, Yantai 264005, People's Republic of China.
| | - Yinchang Zhao
- Department of Physics, Yantai University, Yantai 264005, People's Republic of China.
| | - Xichang Wang
- Department of Physics, Yantai University, Yantai 264005, People's Republic of China.
| | - Jun Ni
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
- Frontier Science Center for Quantum Information, Beijing 100084, People's Republic of China
| | - Zhenhong Dai
- Department of Physics, Yantai University, Yantai 264005, People's Republic of China.
| |
Collapse
|
5
|
Xing D, Sun R, Ma S, Wen H, Wang Z, Deng J. Effect of Sulfuric Acid Corrosion on Flotation Performance of Calcite by Changing Surface Roughness. Molecules 2024; 29:1062. [PMID: 38474576 DOI: 10.3390/molecules29051062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/15/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
Surface roughness is a crucial factor that affects the flotation performance of minerals. In this study, the effect of sulfuric acid corrosion on the surface roughness of calcite flotation was investigated through microflotation tests, scanning electron microscopy (SEM-EDS), atomic force microscopy (AFM), Fourier transform infrared (FT-IR) spectroscopy, and contact angle analysis. Microflotation test results show that sulfuric acid treatment has a serious negative effect on the floatability of calcite. When the sulfuric acid dosage was 4 mL (3 mol/L), the flotation recovery of calcite was reduced to less than 19%. SEM-EDS and AFM results verified that the sulfuric acid treatment significantly changed the surface morphology of calcite, reduced the average surface roughness and surface area, and reduced the amount of active Ca2+ sites on the calcite surface. As characterized by FT-IR and contact angle analyses, the sulfuric acid treatment enhanced the hydrophilicity of the calcite surface and reduced the amount of sodium oleate adsorbed on the calcite surface. Consequently, sulfuric acid corrosion can reduce the average surface roughness of calcite and have a serious negative effect on the flotation performance of calcite.
Collapse
Affiliation(s)
- Dingquan Xing
- Inner Mongolia Research Institute of CUMTB, 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, School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
| | - Ruofan Sun
- Inner Mongolia Research Institute of CUMTB, 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, School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
| | - Shuai Ma
- Inner Mongolia Research Institute of CUMTB, 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, School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
| | - Heping Wen
- Yuxi Dahongshan Mining Co., Ltd., Yuxi 653405, China
| | - Zhongchi Wang
- School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Jiushuai Deng
- Inner Mongolia Research Institute of CUMTB, 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, School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
| |
Collapse
|
6
|
Yang H, Li S, Yu H, Liu H, Sun K, Chen X. Production of anhydrous hydrogen fluoride from fluorosilicic acid: a review. Front Chem 2024; 12:1372981. [PMID: 38476650 PMCID: PMC10927795 DOI: 10.3389/fchem.2024.1372981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 02/02/2024] [Indexed: 03/14/2024] Open
Abstract
Anhydrous hydrogen fluoride (AHF), a critical raw material for industries such as aluminum, pharmaceuticals, and petroleum, has traditionally been sourced from fluorite-a non-renewable mineral. The unsustainable reliance on fluorite has catalyzed the search for alternative AHF production methods. A promising substitute is fluorosilicic acid (FSA), a byproduct of the phosphate fertilizer industry previously deemed waste. Transforming fluorosilicic acid into AHF not only yields a valuable resource but also addresses the environmental and economic challenges associated with waste management. The innovative practice of producing AHF from fluorosilicic acid signals a shift towards sustainable chemical production by capitalizing on waste, potentially diminishing reliance on fluorite and reducing the industry's environmental impact. This review thoroughly dissects the AHF synthesis process from fluorosilicic acid. Despite the acknowledged importance of fluorinated compounds in numerous industrial applications, research on their synthesis from fluorosilicic acid is limited and fragmented. This review seeks to amalgamate this scattered information by closely scrutinizing diverse industrial processing methods. Additionally, it explores the current and future landscape, economic feasibility, and strategies to navigate the obstacles inherent in synthesizing AHF from fluorosilicic acid. It also assesses the environmental impact of these methods, thereby contributing to the dialogue in this emerging field. The primary aim of this manuscript is to foster further research and promote the industrial uptake of this sustainable process. Highlighting the challenges and proposing potential improvements, the review supports the responsible reuse of waste and advocates for advancements in industrial practices.
Collapse
Affiliation(s)
- Huachun Yang
- Do-Fluoride New Materials Co., Ltd., Jiaozuo, China
| | - Shijiang Li
- Do-Fluoride New Materials Co., Ltd., Jiaozuo, China
| | - Hehua Yu
- Do-Fluoride New Materials Co., Ltd., Jiaozuo, China
| | - Haixia Liu
- Do-Fluoride New Materials Co., Ltd., Jiaozuo, China
| | - Kai Sun
- College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Xiaolan Chen
- Do-Fluoride New Materials Co., Ltd., Jiaozuo, China
- College of Chemistry, Zhengzhou University, Zhengzhou, China
| |
Collapse
|
7
|
Xie R, Zhao Z, Wang X, Song Q, Tong X, Xie X. Flotation Separation of Fluorite from Calcite using an Efficient Depressant Nitrilotriacetic Acid in the NaOL System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:2624-2631. [PMID: 38284569 DOI: 10.1021/acs.langmuir.3c03083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Fluorite and calcite were separated with nitrilotriacetic acid (NTA) as a depressant. The single mineral flotation experiment confirmed that with 40 mg/L NaOL and 80 mg/L NTA, the fluorite recovery and calcite recovery were 24.37 and 94.13%, respectively, at pH 9. Meanwhile, in the fluorite-calcite binary mixed ore flotation experiment, the calcite recovery and fluorite recovery were 75.50 and 26.84%, respectively, and the CaCO3 and CaF2 grade in concentrate was 74.32 and 25.61%, respectively. The results confirmed that NTA could be used as a depressant to selectively inhibit fluorite flotation. The mechanism study illustrated that NTA was selectively reacted with fluorite by chemical interaction between O of NTA and Ca of fluorite. The adsorption of NTA on fluorite will impede the interaction between fluorite and NaOL. NTA could adsorb on fluorite in three ways, while the dominant two ways were the complex between double O of NTA and Ca of fluorite in a vertical model and the complex between double O of NTA and Ca of fluorite in a horizontal model.
Collapse
Affiliation(s)
- Ruiqi Xie
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
- State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102600, China
| | - Zhihui Zhao
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
- State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102600, China
| | - Xun Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
- State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102600, China
| | - Qiang Song
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
- State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102600, China
| | - Xiong Tong
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
- State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102600, China
| | - Xian Xie
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
- State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102600, China
| |
Collapse
|
8
|
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.
Collapse
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
| |
Collapse
|
9
|
Zhang H, Kou J, Sun C. Combing Seeding Crystallization with Flotation for Recovery of Fluorine from Wastewater: Experimental and Molecular Simulation Studies. Molecules 2023; 28:molecules28114490. [PMID: 37298965 DOI: 10.3390/molecules28114490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 05/28/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
For effective removal and utilization of fluorine resources from industrial wastewater, stepwise removal and recovery of fluorine were accomplished by seeding crystallization and flotation. The effects of seedings on the growth and morphology of CaF2 crystals were investigated by comparing the processes of chemical precipitation and seeding crystallization. The morphologies of the precipitates were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM) measurements. The seed crystal, fluorite, helps improve the growth of perfect CaF2 crystals. The solution and interfacial behaviors of the ions were calculated by molecular simulations. The existing perfect surface of fluorite was proven to provide the active sites for ion adhesion and formed a more ordered attachment layer than the precipitation procedure. The precipitates were then floated to recover calcium fluoride. By stepwise seeding crystallization and flotation, the products with a CaF2 purity of 64.42% can be used to replace parts of metallurgical-grade fluorite. Both removal of fluorine from wastewater and the reutilization of the fluorine resource were realized.
Collapse
Affiliation(s)
- Hao Zhang
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jue Kou
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Chunbao Sun
- School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
| |
Collapse
|
10
|
El-Bahi A, Taha Y, Ait-Khouia Y, Hakkou R, Benzaazoua M. Advancing phosphate ore minerals separation with sustainable flotation reagents: An investigation into highly selective biobased depressants. Adv Colloid Interface Sci 2023; 317:102921. [PMID: 37209485 DOI: 10.1016/j.cis.2023.102921] [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: 04/06/2023] [Revised: 05/09/2023] [Accepted: 05/13/2023] [Indexed: 05/22/2023]
Abstract
Froth flotation has been a commonly employed technique to enrich natural ores by removing impurities based on the surface properties of minerals. This process involves the use of various reagents, including collectors, depressants, frothers, and activators, which are often chemically synthesized and may represent environmental risks. Therefore, there is a growing need to develop biobased reagents that offer more sustainable alternatives. The aim of this review is to provide a comprehensive assessment of the potential of biobased depressants as a sustainable alternative to traditional reagents in selective flotation process for phosphate ore minerals. To achieve this objective, the review investigates the extraction and the purification methods of different biobased depressants, analyzes the specific conditions for reagent interaction with minerals, and assess the biobased depressants' performance through a range of fundamental studies. These studies aim to (i) provide a better understanding of the adsorption behavior of some biobased depressants onto the surfaces of apatite, calcite, dolomite, and quartz comprised in different mineral systems by measuring their zeta potential and analyzing their Fourier transform infrared spectra before and after contact with these reagents, (ii) determine the depressants' adsorption amounts, (iii) evaluate their effect on the contact angle of bare minerals, and (iv) assess their ability to inhibit the flotation of the studied minerals. The outcomes revealed the potential use and the promising applicability of these unconventional reagents since their performance is comparable to that of conventional reagents. In addition to their good effectiveness, these biobased depressants have the added advantages of being cost effective, biodegradable, non-toxic, and ecofriendly. Nevertheless, further research and investigations are required to improve the selectivity and, consequently, the effectiveness of biobased depressants.
Collapse
Affiliation(s)
- Asmae El-Bahi
- Geology & Sustainable Mining Institute (GSMI), Mohammed VI Polytechnic University, Lot 660. Hay Moulay Rachid, Ben Guerir 43150, Morocco
| | - Yassine Taha
- Geology & Sustainable Mining Institute (GSMI), Mohammed VI Polytechnic University, Lot 660. Hay Moulay Rachid, Ben Guerir 43150, Morocco.
| | - Yassine Ait-Khouia
- Geology & Sustainable Mining Institute (GSMI), Mohammed VI Polytechnic University, Lot 660. Hay Moulay Rachid, Ben Guerir 43150, Morocco
| | - Rachid Hakkou
- Geology & Sustainable Mining Institute (GSMI), Mohammed VI Polytechnic University, Lot 660. Hay Moulay Rachid, Ben Guerir 43150, Morocco; IMED-Lab, Faculty of Science and Technology, Cadi Ayyad University (UCA), BP 549, Marrakech 40000, Morocco
| | - Mostafa Benzaazoua
- Geology & Sustainable Mining Institute (GSMI), Mohammed VI Polytechnic University, Lot 660. Hay Moulay Rachid, Ben Guerir 43150, Morocco
| |
Collapse
|
11
|
Nie S, Guo Z, Tian M, Sun W. Selective flotation separation of cassiterite and calcite through using cinnamohydroxamic acid as the collector and Pb2+ as the activator. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
|
12
|
Shi D, Li W, Han Y. Fluorite flotation separation from bastnaesite via an eco-friendly polymer as a depressant and insight into its mechanism of adsorption. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
13
|
Evaluation of 2-phosphatebutane-1, 2, 4-tricarboxylic acid as a depressant in the flotation separation of fluorite from barite. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
14
|
Wu J, Ye R, Xu DJ, Wan L, Reina TR, Sun H, Ni Y, Zhou ZF, Deng X. Emerging natural and tailored perovskite-type mixed oxides–based catalysts for CO2 conversions. Front Chem 2022; 10:961355. [PMID: 35991607 PMCID: PMC9388861 DOI: 10.3389/fchem.2022.961355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 07/01/2022] [Indexed: 11/13/2022] Open
Abstract
The rapid economic and societal development have led to unprecedented energy demand and consumption resulting in the harmful emission of pollutants. Hence, the conversion of greenhouse gases into valuable chemicals and fuels has become an urgent challenge for the scientific community. In recent decades, perovskite-type mixed oxide-based catalysts have attracted significant attention as efficient CO2 conversion catalysts due to the characteristics of both reversible oxygen storage capacity and stable structure compared to traditional oxide-supported catalysts. In this review, we hand over a comprehensive overview of the research for CO2 conversion by these emerging perovskite-type mixed oxide-based catalysts. Three main CO2 conversions, namely reverse water gas shift reaction, CO2 methanation, and CO2 reforming of methane have been introduced over perovskite-type mixed oxide-based catalysts and their reaction mechanisms. Different approaches for promoting activity and resisting carbon deposition have also been discussed, involving increased oxygen vacancies, enhanced dispersion of active metal, and fine-tuning strong metal-support interactions. Finally, the current challenges are mooted, and we have proposed future research prospects in this field to inspire more sensational breakthroughs in the material and environment fields.
Collapse
Affiliation(s)
- Juan Wu
- Institute of Cotton, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Runping Ye
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, Institute of Applied Chemistry, School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China
- *Correspondence: Runping Ye, ; Zhang-Feng Zhou, ; Xiaonan Deng,
| | - Dong-Jie Xu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
| | - Lingzhong Wan
- Institute of Cotton, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Tomas Ramirez Reina
- Department of Chemical and Process Engineering, University of Surrey, Guildford, United Kingdom
- Department of Inorganic Chemistry and Materials Sciences Institute, University of Seville-CSIC, Seville, Spain
| | - Hui Sun
- Institute of Cotton, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Ying Ni
- Institute of Cotton, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Zhang-Feng Zhou
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
- *Correspondence: Runping Ye, ; Zhang-Feng Zhou, ; Xiaonan Deng,
| | - Xiaonan Deng
- Institute of Cotton, Anhui Academy of Agricultural Sciences, Hefei, China
- *Correspondence: Runping Ye, ; Zhang-Feng Zhou, ; Xiaonan Deng,
| |
Collapse
|
15
|
Difficulties and Recent Achievements in Flotation Separation of Fluorite from Calcite—An Overview. MINERALS 2022. [DOI: 10.3390/min12080957] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main beneficiation method for the concentration. Compared with the relatively easy operation for silicate-type fluorite ore, fluorite concentration from calcite has always been the most difficult challenge in the field of mineral processing. In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface properties of both calcium minerals to the deterioration by the interference of dissolved ions in the pulp during grinding and flotation. Recent achievements in the flotation separation of fluorite from calcite as the main contents are comprehensively summarized, covering all aspects of flotation reagents of collectors, depressants and modifiers. Finally, successful examples of industrial practices forfluorite and calcite flotation separation are introduced. This overview provides a detailed and comprehensive reference source for the current research status of fluorite and calcite flotation separation, and some suggestions for future research are provided.
Collapse
|
16
|
Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions. COLLOIDS AND INTERFACES 2022. [DOI: 10.3390/colloids6030041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
This study presents the equilibrium surface tension (ST), critical micelle concentration (CMC) and the dilational viscoelasticity of sodium dodecylbenzene sulfonate (SDBS)-adsorbed layers in the presence of NaCl, KCl, LiCl, CaCl2 and MgCl2 at 0.001–0.1 M salt concentration. The ST and surface dilational viscoelasticity were determined using bubble-shape analysis technique. To capture the complete profile of dilational viscoelastic properties of SDBS-adsorbed layers, experiments were conducted within a wide range of SDBS concentrations at a fixed oscillating frequency of 0.01 Hz. Salts were found to lower the ST and induce micellar formation at all concentrations. However, the addition of salts increased dilational viscoelastic modulus only at a certain range of SDBS concentration (below 0.01–0.02 mM SDBS). Above this concentration range, salts decreased dilational viscoelasticity due to the domination of the induced molecular exchange dampening the ST gradient. The dilational viscoelasticity of the salts of interest were in the order CaCl2 > MgCl2 > KCl > NaCl > LiCl. The charge density of ions was found as the corresponding factor for the higher impact of divalent ions compared to monovalent ions, while the impact of monovalent ions was assigned to the degree of matching in water affinities, and thereby the tendency for ion-pairing between SDBS head groups and monovalent ions.
Collapse
|
17
|
Pickering foams and parameters influencing their characteristics. Adv Colloid Interface Sci 2022; 301:102606. [PMID: 35182930 DOI: 10.1016/j.cis.2022.102606] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 11/21/2022]
Abstract
Pickering foams are available in many applications and have been continually gaining interest in the last two decades. Pickering foams are multifaceted, and their characteristics are highly dependent on many factors, such as particle size, charge, hydrophobicity and concentration as well as the charge and concentration of surfactants and salts available in the system. A literature review of these individual studies at first might seem confusing and somewhat contradictory, particularly in multi-component systems with particles and surfactants with different charges in the presence of salts. This paper provides a comprehensive overview of particle-stabilized foams, also known as Pickering foams and froths. Underlying mechanisms of foam stabilization by particles with different morphology, surface chemistry, size and type are reviewed and clarified. This paper also outlines the role of salts and different factors such as pH, temperature and gas type on Pickering foams. Further, we highlight recent developments in Pickering foams in different applications such as food, mining, oil and gas, and wastewater treatment industries, where Pickering foams are abundant. We conclude this overview by presenting important research avenues based on the gaps identified here. The focus of this review is limited to Pickering foams of surfactants with added salts and does not include studies on polymers, proteins, or other macromolecules.
Collapse
|
18
|
Liu C, Zhang X, Zheng Y, Ren Z, Fu W, Yang S. Utilization of water glass as a dispersant to improve the separation performance of fluorite from barite slimes. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
19
|
Adsorption and depression mechanism of an eco-friendly depressant dextrin onto fluorite and calcite for the efficiency flotation separation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127987] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
20
|
A selective flotation of fluorite from dolomite using caustic cassava starch and its adsorption mechanism: An experimental and DFT Study. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127876] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
21
|
Wang X, Yuan S, Liu J, Zhu Y, Han Y. Nanobubble-enhanced flotation of ultrafine molybdenite and the associated mechanism. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
22
|
Zhou L, Han Y, Li W, Zhu Y. Study on polymer-bridging flocculation performance of ultrafine specular hematite ore and its high gradient magnetic separation behavior: Description of floc microstructure and flocculation mechanism. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119304] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
23
|
Aarab I, Derqaoui M, El Amari K, Yaacoubi A, Abidi A, Etahiri A, Baçaoui A. Influence of surface dissolution on reagents’ adsorption on low-grade phosphate ore and its flotation selectivity. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127700] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
24
|
Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass. MINERALS 2021. [DOI: 10.3390/min11111203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
As a common depressant, acidified water glass (AWG) has strong inhibitory effects on fluorite and calcite. The inhibited fluorite is difficult to be recovered, thus resulting in the waste of resources and low flotation efficiency. In this study, the interaction of fluoride ions with fluorite and calcite surfaces was investigated, and its effects of AWG adsorption on mineral surfaces were evaluated. Micro-flotation experiments indicated that the flotation recovery of fluorite is 88.72% after fluoride ion treatment, that is, approximately fourfold with respect to that without fluoride ion modification. The results of solution chemical calculations showed that SiO(OH)3− is the main component to inhibit fluorite, and Si(OH)4 is the main component to inhibit calcite in AWG solution. XPS and ICP-MS results showed that fluoride ions can improve the floatability of fluorite by converting CaSiO3 on the surface of fluorite into CaF2, but the conversion ability of Si(OH)4 on the surface of calcite is weak, which increases the difference in floatability between fluorite and calcite. The above results were further verified by the analysis of flotation foam image and contact angle measurement. After fluorine ion treatment, the contact angle of fluorite increased, and it was more easily adsorbed on the foam. Therefore, the interaction of the fluoride ion with the fluorite surfaces eliminated the adsorption of AWG on fluorite, thereby resulting in the enhanced hydrophobicity of fluorite. Different from the traditional metal ions modification, the idea of anion modification in this paper is expected to be further studied.
Collapse
|
25
|
Liu C, Wang Q, Yang S. Effects of barite size on the fluorite flotation using the reagent scheme of GS/NaOl. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|