Article
Spectroscopy
Piyali Deb Barman, Ashok Kumar Maurya, Subhendu Ghosh, Ankit Roy, Mukul Madaan
Summary: In X-ray spectroscopic studies, K beta 1,3 lines have been used to examine the chemical states of 3d transition metals, but are not suitable for characterizing iron oxides. Instead, FeL-lines, which involve the valence shell 3d electrons, were inspected and found to provide information on the chemical states of iron. The study established a linear relationship between the chemical shift of FeL beta 1 line and spin multiplicity, allowing for the speciation of iron.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2024)
Article
Chemistry, Multidisciplinary
Luca Bellucci, Lorenzo Fioravanti, Lidia Armelao, Gregorio Bottaro, Fabio Marchetti, Francesco Pineider, Giordano Poneti, Simona Samaritani, Luca Labella
Summary: This study demonstrates the site selectivity of hetero-lanthanide tetranuclear complexes using the simple ligand pyterpyNO. The selectivity is directly dependent on the difference in ionic radii of the ions and is not exclusively governed by electrostatic interactions related to size dimensions.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Materials Science, Ceramics
I. Antunes, L. C. M. Ruivo, L. A. C. Tarelho, A. A. Yaremchenko, J. R. Frade
Summary: In this study, the brownmillerite phase Ca2Fe2O5 was synthesized by reactive firing of calcite and siderite. The decomposition of precursors and its dependence on heating rate and atmosphere were investigated using thermogravimetry and X-ray diffraction. The study found that by adjusting the firing conditions, high conversion and crystallinity of Ca2Fe2O5 could be achieved.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Lihui Liu, Qinfu Liu, Shuai Zhang, Yakui Li, Longtao Yang
Summary: Pyrite, a common and important mineral in coal and coal gangue, undergoes thermal transformation during combustion, impacting the environment and coal utilization. This study reveals that during coal gangue combustion, pyrite transforms into hematite and releases SO2 gas.
Article
Chemistry, Multidisciplinary
Dmitry V. Karpinsky, Maxim V. Silibin, Siarhei I. Latushka, Dmitry V. Zhaludkevich, Vadim V. Sikolenko, Hanan Al-Ghamdi, Aljawhara H. Almuqrin, M. I. Sayyed, Alexei A. Belik
Summary: The crystal structure and magnetic state of the (1 - x)BiFeO3-(x)BiMnO3 solid solution were analyzed. It was found that increasing the dopant concentration led to structural and magnetic transitions at room temperature, resulting in a two-phase structure. Irreversible temperature-driven structural transitions favored the stabilization of high-temperature structural phases.
Article
Thermodynamics
Lucas Malone Ferreira de Castro, Marluce Oliveira da Guarda Souza
Summary: This study investigated the effects of adding mango residue on the combustion process and properties of iron nitrate-urea mixtures. The results showed that this addition can alter the structure, morphology, and textural properties of the products, particularly leading to a significant increase in specific surface area in the closed system-produced material.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Inorganic & Nuclear
A. L. Zinnatullin, I. Yu Nosov, M. A. Cherosov, A. G. Kiiamov, F. G. Vagizov
Summary: This study reports the effect of doping with europium ions on the magnetic properties of bismuth ferrite. Through various methods, the researchers gained a deeper understanding of the mechanisms behind the changes in magnetic response caused by doping. It was found that within a certain doping range, the crystal structure parameters remained stable, but beyond that range, the crystal structure changed. Additionally, the magnetic properties were found to be correlated with the crystal structure.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Geochemistry & Geophysics
Dewashish Upadhyay, Suman Mondal, Ashim K. Patel, Biswajit Mishra, Kamal L. Pruseth, S. K. Bhushan
Summary: The study documents complex microtextures of REE mineralization in calciocarbonatites from the Kamthai alkaline complex in western India, possibly originating from interactions during low-temperature hydrothermal alteration. A new mechanism of REE precipitation in magnetite-rich carbonatites involving influx of acidic hydrothermal fluids is proposed, resulting in significant rock porosity and fluid-rock reactions.
Article
Chemistry, Physical
Xi Shi, Udo Eckstein, Yizhe Li, David Hall, Neamul H. Khansur
Summary: In situ, spatially-resolved synchrotron X-ray diffraction was used to investigate the electric field-induced phase transformation of nonergodic relaxor 0.93Na(1/2)Bi(1/2)TiO(3)-0.07BaTiO(3) ceramics. The study found that the copper electrode side coated by aerosol deposition exhibited more significant lattice strain and domain texture compared to the platinum side deposited by sputter deposition.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Glen. G. G. Briand, Tanner George, Gregory. A. A. MacNeil, Jason. D. D. Masuda, Brian. J. J. MacLean, Michael W. R. Mosher, Gregory. M. M. Sandala, Padmapriya Srinivasan, Alexander. H. H. Stockli, Rachel. L. L. Vanderkloet, Charles. J. J. Walsby
Summary: Organoindium compounds with redox active 1,2-benzenedithiolate and 2-amidobenzenethiolate ligands were synthesized and tested for reactivity against mild oxidants. The reactivity of these compounds varied with different oxidants and exhibited structural differences.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Emily Siska, Dean Smith, Ashkan Salamat, Keith V. Lawler, Barbara Lavina, Frederic Poineau, Paul M. Forster
Summary: The synthesis and phase stability of TcN, Tc2N, and a substoichiometric TcNx were demonstrated under high pressure and temperature conditions, with a previously unpredicted structure identified for TcN through crystal structure prediction.
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Tim Platte, Nicolas Finck, Frank Heberling, Robert Polly, Tim Pruessmann, Kathy Dardenne, Horst Geckeis
Summary: Research shows that green rust chloride (GR-Cl) can retain iodide at low ionic strengths and pH levels between 7.5 and 8.5. The sorption of iodide by GR-Cl is influenced by ion exchange and the transformation of GR-Cl/I phases to magnetite. The presence of sulfate anions inhibits the uptake of iodide.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shuo Feng, Rajesh Kumar Singh, Yucheng Fu, Zhuo Li, Yulong Wang, Jie Bao, Zhijie Xu, Guosheng Li, Cassidy Anderson, Lili Shi, Yuehe Lin, Peter G. Khalifah, Wei Wang, Jun Liu, Jie Xiao, Dongping Lu
Summary: In this study, a simple strategy was demonstrated for constructing low-tortuosity through-pores in both vertical and planar directions of electrodes by casting large particles into single-particle-layer electrodes. Through multi-scale characterizations and simulations, correlations between material/electrode structures, electrolyte permeability, polysulfide migration, and sulfur reactions were elucidated. The high-loading and dense sulfur cathode fabricated by this method delivers a high specific capacity at a very low electrolyte/sulfur ratio.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Spectroscopy
Zhenqi Zhu, Yujing Bian, Xun Zhang, Ruonan Zeng, Bin Yang
Summary: This study characterized the thermal chemical reactions of L-Glutamic acid using terahertz time domain spectroscopy (THz-TDS). The results showed that the reaction rate of dehydration and racemization is significantly influenced by temperature. The absorption intensity at 0.97 and 1.55 THz was found to have a nonlinear relationship with reaction temperature and time.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Physics, Applied
T. Firoz Khan, U. Naresh, T. Ramprasad, R. Jeevan Kumar
Summary: A series of cobalt-doped nickel ferrite nanoparticles were successfully synthesized using a low-temperature hydrothermal method, and their structural, morphological, and magnetic properties were examined. Analysis through X-ray diffraction and energy-dispersive spectrum confirmed the composition and purity of the nanoparticles, while field emission scanning electron microscopy revealed the morphology of the particles. The study demonstrated that these materials exhibit good magnetic properties suitable for memory device applications, showing characteristics of superparamagnetism.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2021)
Article
Engineering, Chemical
V. P. Ponomar, N. O. Dudchenko, A. B. Brik
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2017)
Article
Materials Science, Multidisciplinary
V. P. Ponomar, N. O. Dudchenko, A. B. Brik
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2017)
Article
Chemistry, Physical
V. P. Ponomar
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Engineering, Chemical
V. P. Ponomar
MINERALS ENGINEERING
(2018)
Article
Engineering, Chemical
V. P. Ponomar, O. B. Brik, Yu Cherevko, V. V. Ousienko
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2019)
Article
Mineralogy
T. S. Antonenko, A. B. Brik, O. Yu Tsymbal, N. O. Dudchenko, V. V. Ovsienko, Yu Cherevko
Summary: The study investigated phase transformations of natural and synthetic hematite under the influence of microwave radiation in Fe (II)-containing aqueous medium at temperatures ranging from room temperature to 260 degrees C and pressure of 6 MPa. The saturation magnetization of samples significantly increased to 27 A.m(2)/kg after phase transformations, showing transformation into magnetite.Furthermore, the high saturation magnetization of the obtained magnetic particles opens up promising applications in various fields such as adsorbents for radioactive waste and carriers for magnetic drug targeting.
MINERALOGICAL JOURNAL-UKRAINE
(2021)
Article
Mineralogy
M. M. Bagmut, T. G. Kalinichenko, A. B. Brik, N. O. Dudchenko, M. O. Kalinichenko
Summary: The mineral components of powdered samples of cortical dense bone tissue of domestic animals were studied using electron paramagnetic resonance (EPR). After heat treatment and X-ray irradiation, multicomponent EPR signals were observed, indicating a more complex phosphate structure in bone tissue compared to synthetic hydroxyapatite.
MINERALOGICAL JOURNAL-UKRAINE
(2021)
Article
Mineralogy
T. S. Antonenko, A. B. Brik, N. O. Dudchenko
MINERALOGICAL JOURNAL-UKRAINE
(2019)
Article
Mineralogy
T. S. Antonenko, A. B. Brik, V. P. Ponomar, N. O. Dudchenko
MINERALOGICAL JOURNAL-UKRAINE
(2018)
Proceedings Paper
Nanoscience & Nanotechnology
V. P. Ponomar, N. O. Dudchenko, A. B. Brik
PROCEEDINGS OF THE 2017 IEEE 7TH INTERNATIONAL CONFERENCE NANOMATERIALS: APPLICATION & PROPERTIES (NAP)
(2017)
Article
Geosciences, Multidisciplinary
V. P. Ponomar, N. O. Dudchenko, A. B. Brik
DNIPROPETROVSK UNIVERSITY BULLETIN SERIES-GEOLOGY GEOGRAPHY
(2017)
Article
Mineralogy
V. P. Ponomar, A. B. Brik, Yu Cherevko, V. V. Ovsienko
MINERALOGICAL JOURNAL-UKRAINE
(2017)
Article
Engineering, Chemical
Benjamin De Castro, Mostafa Benzaazoua, Soumali Roychowdhury, Aurelie Chopard, Francis Quintal Lauzon, Benoit Plante
Summary: This study proposes an innovative method using deep learning algorithm and reflected light optical imaging to automatically detect all particles and minerals in acrylic resin polished sections. The experimental results show that this method can accurately detect all mineral particles, including transparent minerals, under reflected light optical microscopy, and provide unbiased mineralogical quantification.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Qiushi Song, Xinyu Du, Changlu Shan, Hongwei Xie, Zhiqiang Ning, Kai Yu
Summary: This study investigated the effect of magnetic stirring on the microstructure of Co deposits during electrowinning in a chloride solution. It was found that magnetic stirring effectively reduced the negative influence of H2 bubbles on the structure of Co deposits and changed their nucleation and growth behavior, resulting in the preparation of high-quality columnar Co crystals.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Tao Ge, Xiaowei Zhou, Liang Xu, Yan Sun, Cheng Yang, Yongpan Tian, Zhuo Zhao
Summary: In this study, the extraction performance and complexation mechanism of p-di-ethyl-amino-methylthiacalix[4]arene (L) towards Pt(IV) were investigated. The results indicated that L had excellent complexation ability towards Pt(IV) and could selectively extract it from a solution containing multiple competing ions.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yuan Li, Dirk van Zyl
Summary: This paper presents a modified Kynch's approach to explain the hindered settling behavior of suspensions impacted by segregation. The experimental data and predicted results confirm the effectiveness of the proposed method.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yi Fang, Aurora Robledo-Cabrera, Changsheng Peng, Shan Huang, Qi Xiao, Alejandro Lopez-Valdivieso
Summary: With the assistance of mechanical ball milling, the partially oxidized micro-sponge iron (micro-Fe0@Fe2O3) achieves significantly improved removal of Cr(VI) across a broad pH range. Mechanical force eliminates the surface oxide layer and exposes the Fe0 core, leading to sustained reduction of Cr(VI). The efficiency of micro-Fe0@Fe2O3 is strongly influenced by dissolved oxygen, with higher DO resulting in the generation of stable reductant Fe(II) under acidic conditions, while DO consumption hinders the reduction of Cr(VI) under alkaline conditions due to increased pH. Parameters of ball milling operation, especially rotation speed, have a significant impact on the removal of Cr(VI).
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Alton F. Grabsch, Phillip D. Fawell, Michael G. Davies
Summary: High molecular weight partially hydrolysed polyacrylamide (PHPA) is commonly used in mineral exploration drilling to increase fluid viscosity and help maintain the suspension of fine particles. However, clarifying these suspensions can be difficult, and previous studies have found that anionic flocculants are ineffective. This study confirmed that nonionic flocculants can successfully aggregate the particles, indicating that the charged tails of adsorbed PHPA prevent anionic flocculants from accessing the particle surfaces.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
J. S. Guiral-Vega, L. Perez-Barnuevo, J. Bouchard, A. Ure, E. Poulin, C. Du Breuil
Summary: This paper introduces an approach that combines particle properties and process modeling to describe the behavior of iron ore in a laboratory-scale drum-type magnetic separator. Early information on iron ore processing behavior can be obtained through laboratory testing, automated mineralogy analysis, and process modeling.
MINERALS ENGINEERING
(2024)
Review
Engineering, Chemical
Sayed Janishar Anzoom, Ghislain Bournival, Seher Ata
Summary: This review discusses the benefits and challenges of coarse particle flotation, as well as recent developments in improving the process. Coarse particle flotation has various applications and offers advantages in technical, economic, and sustainability aspects. However, it also faces challenges such as particle detachment, transfer between phases, and persistence in the froth phase. Technological advancements, such as fluidized-bed flotation and processes enhancing bubble-particle attachment, have shown promising results in efficiently recovering larger particles.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Yimei Xiao, Jinchan Feng, Bingqiao Yang, Huihua Luo, Fang Zhou
Summary: In this study, the use of fulvic acid as a depressant for the flotation separation of chalcopyrite from arsenopyrite was investigated. It was found that fulvic acid strongly depressed arsenopyrite while having little influence on chalcopyrite flotation. The addition of calcium hypochlorite facilitated the adsorption of fulvic acid on arsenopyrite surface.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Bo Hao, Minqiang Fan
Summary: Particle-bubble attachment is crucial in coal and mineral flotation processes. In this study, the attachment process of low-rank coal particles to the bubble surface was simulated, revealing the important role of water film rupture in particle attachment.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Shuwei Wu, Shuai Wang, Guoqiang Wang, Longfei Fan, Jianbo Guo, Zhengbin Liu, Haoyan Zhang, Wei Guan, Yukuan Wang, Yewei Wu
Summary: This study analyzes the motion mode of eccentric roller crushers and proposes a calculation method for productivity. Through laboratory experiments, the results indicate that the proposed method can effectively estimate the productivity of eccentric roll crushers.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Hanna Miettinen, Malin Bomberg, Ozlem Bicak, Zafir Ekmekci, Paivi Kinnunen
Summary: Mineral processing requires large amounts of water, and reducing water consumption through recirculation and closing water loops is important. However, this can lead to the accumulation of contaminants in the process water, which can negatively affect the process performance. In this study, the impact of microorganisms on flotation performance was investigated, and ion exchange was evaluated for removing dissolved sulfur species and microorganisms from water. The results showed that adding microorganisms had a positive effect on flotation selectivity, especially for nickel. Different water types, process water and final tailings water, behaved slightly differently. Ion exchange proved to be effective in removing sulfur species and microorganisms, and dissolved air flotation was a successful pretreatment for ion exchange in removing microorganisms.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Canneng Chen, Song Zhang, Quanjun Liu, Luzheng Chen, Yongjun Xian, Yijie Wang
Summary: This study introduces the use of ultrasonic pretreatment to enhance the flotation separation of elemental sulfur and silver-bearing lead minerals from ultrafine residue. The results show that ultrasonic pretreatment effectively liberates associated sulfur and improves the separation of sulfur and silver-bearing lead minerals. Under optimized conditions, ultrasonic pretreatment significantly improves the recovery and grade of sulfur in the concentrate, as well as the recovery of lead and silver in the tailings.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Genzhuang Li, Fisher Wang, Bern Klein, Michael Deal, Aaron Wright, Hector Mezquita
Summary: This paper presents a stress-based approach for predicting and improving large-scale HIG mill performance through experimental testing and model calibration.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Runpeng Liao, Shuming Wen, Jian Liu, Shaojun Bai, Qicheng Feng
Summary: This study demonstrates that the use of a DDA/DDTC mixed collector system can significantly improve the flotation performance of smithsonite. The synergistic effect between DDA and DDTC is confirmed, and the mixed collector system contributes to a decrease in solution surface tension. The use of FT-IR and XPS confirms the simultaneous physisorption and chemisorption of DDA and DDTC on the smithsonite surface, and contact angle measurements show that the mixed collector effectively enhances the hydrophobicity of smithsonite. Molecular dynamics simulations reveal the multilayer adsorption of DDTC and DDA on the smithsonite surface, with DDTC promoting the adsorption of DDA.
MINERALS ENGINEERING
(2024)