Article
Engineering, Chemical
Jinping Meng, Longhua Xu, Donghui Wang, Kai Xue, Liping Luo, Xinzhang Shi
Summary: The study of the interaction mechanism between metal ions and spodumene is of great significance for spodumene flotation. This research investigated the activation ability of Fe3+, Mg2+, and Ca2+ on spodumene flotation with NaOL. The results showed that Mg2+ and Ca2+ had superior activation ability compared to Fe3+. The activation mechanism of metal ions was explored through various analyses, revealing that metal ions not only provide more active sites for NaOL adsorption, but also form colloidal complexes with NaOL.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Hao Lai, Jiushuai Deng, Quanjun Liu, Shuming Wen, Qiang Song
Summary: This study investigated the surface chemistry differences between minerals in lead concentrate and tailings in complex flotation circuits of lead-zinc sulfide ores. The results showed that the adsorption of lead ions onto specific mineral surfaces was an important reason for the failed separation of minerals from galena. The surface chemical evidence provided by this study helps to better understand the selective separation mechanism of lead-zinc sulfide ores.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Wil Gardner, David A. Winkler, Suzanne M. Cutts, Steven A. Torney, Geoffrey A. Pietersz, Benjamin W. Muir, Paul J. Pigram
Summary: Feature extraction algorithms are important for reducing data dimensionality, but most methods do not consider spatial information. This study introduces a convolutional autoencoder algorithm that can be applied to hyperspectral ToF-SIMS imaging and achieves better results.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Wil Gardner, David A. Winkler, Suzanne M. Cutts, Steven A. Torney, Geoffrey A. Pietersz, Benjamin W. Muir, Paul J. Pigram
Summary: Feature extraction algorithms are important for reducing data dimensionality, but most methods do not consider spatial information. This study introduces a convolutional autoencoder (CNNAE) specifically designed for hyperspectral ToF-SIMS imaging data, which incorporates pixel neighborhood information through convolutional layers. Compared to other methods, the CNNAE produces features with higher contrast and autocorrelation, accurately representing histologically recognizable features in the data. Additionally, the extension of CNNAE to 3D ToF-SIMS images provides a proof of principle for analyzing more complex 3D datasets.
ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Agnieszka Kaminska, Magdalena E. Marzec, Ewa L. Stepien
Summary: This study tested and optimized silicon surface functionalization procedures for capturing urinary extracellular vesicles (uEVs), investigating the influence of silane type and protein concentration on binding efficiency, observing changes in the biosensor surface using surface characterization techniques, purifying uEVs by a low-vacuum filtration method and concentrating them by ultracentrifugation, and determining physical parameters of uEVs post-isolation. Results showed gradual growth of the molecular layer after modification stages, with no significant changes in characteristic peaks of amino acids and lipids in positive and negative polarization. The optimal concentration of lactadherin protein for the tested system was found to be 25 μg/mL.
Article
Materials Science, Multidisciplinary
A. Franquet, V. Spampinato, S. Kayser, W. Vandervorst, P. van der Heide
Summary: Shrinking semiconductor device dimensions require new methods and technologies for materials characterization. SF-SIMS and OrbitrapTM-SIMS methods have been demonstrated to accurately quantify impurities in small structures.
Article
Materials Science, Multidisciplinary
M. Bousseksou, G. Gutierrez, Y. Pipon, D. Gosset, N. Moncoffre
Summary: This study aims to investigate the Li diffusion in B4C. The results showed that the thermal diffusion into the grain boundaries in B4C is about four orders of magnitude higher than into the grains. These findings are of great importance for material selection and safety control in nuclear reactors.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Chemistry, Analytical
Aljoscha Korber, Joel D. Keelor, Britt S. R. Claes, Ron M. A. Heeren, Ian G. M. Anthony
Summary: In this study, a new method called fast mass microscopy is proposed, which combines a Timepix3 detector with continuously sampling secondary ion mass spectrometry mass microscope to achieve high throughput imaging at lower mass resolution compared to conventional MSI. This method enables the acquisition of submicron, gigapixel images of fingerprints and rat tissue at significantly faster speeds than traditional microprobe-mode MSI.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Satoka Aoyagi, Yukio Fujiwara, Akio Takano, Jean-Luc Vorng, Ian S. Gilmore, Yung-Chen Wang, Elke Tallarek, Birgit Hagenhoff, Shin-Ichi Iida, Andreas Luch, Harald Jungnickel, Yusheng Lang, Hyun Kyong Shon, Tae Geol Lee, Zhanping Li, Kazuhiro Matsuda, Ichiro Mihara, Ako Miisho, Yohei Murayama, Takaharu Nagatomi, Reiko Ikeda, Masayuki Okamoto, Kunio Saiga, Toshihiko Tsuchiya, Shigeaki Uemura
Summary: This study conducted an interlaboratory research on the identification of peptide sample TOF-SIMS spectra using machine learning. The results showed that Random Forest prediction can effectively determine the amino acids in unknown peptides, and achieve high prediction accuracy for trained peptides.
ANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Coatings & Films
Wil Gardner, David A. Winkler, David L. J. Alexander, Davide Ballabio, Benjamin W. Muir, Paul J. Pigram
Summary: In this study, two different ToF-SIMS imaging datasets were used to evaluate the impact of data preprocessing methods and SOM hyperparameters on the performance of SOM. It was found that preprocessing is generally more important than hyperparameter selection, and there are complex interactions between different parameters. The results of this study are important for understanding the effects of data processing on hyperspectral imaging data.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Environmental Sciences
Antoine Aynard, Cecile Courreges, Javier Jimenez-Lamana, Anassya Raad, Christelle Miqueu, Bruno Grassl, Stephanie Reynaud
Summary: The mass and volume concentration of nanoplastics are low, but their surface area is high, which can increase their toxicity by adsorbing chemical co-pollutants such as trace metals. This study investigated the interactions between carboxylated nanoplastics and copper, and confirmed that nanoplastics can act as carriers for metal pollutants through both adsorption and absorption processes.
ENVIRONMENTAL POLLUTION
(2023)
Article
Physics, Applied
A. A. Murthy, J. Lee, C. Kopas, M. J. Reagor, A. P. McFadden, D. P. Pappas, M. Checchin, A. Grassellino, A. Romanenko
Summary: This study investigates the impacts of fabrication procedures on the dissipation mechanisms in superconducting qubits using time-of-flight secondary ion mass spectrometry. The results show that the formation of oxide and silicide regions and the incorporation of impurity species, such as niobium hydrides and carbides, affect the superconducting properties of the Nb thin film. It also reveals the presence of halogen species in the patterned thin films. Understanding the source of these impurities can contribute to intelligent fabrication of superconducting qubits and prolong coherence times.
APPLIED PHYSICS LETTERS
(2022)
Article
Spectroscopy
Qing Li, Yan Fang, Jianghua Liu, Chengrong Zhang, Zheng Wang
Summary: In this study, LA-ICP-MS was utilized to map the elemental images of curved surface samples by segmenting and recombining. The investigation also focused on the influence of parameters on lateral resolution. The method was applied to imaging analysis of lanthanum in an alumina ceramic tube, revealing non-uniform distribution of lanthanum within the tube.
ATOMIC SPECTROSCOPY
(2021)
Article
Nanoscience & Nanotechnology
Haw-Ming Huang, Ping-Han Wu, Po-Chien Chou, Wen-Tien Hsiao, Hsin-Ta Wang, Hsin-Pei Chiang, Chi-Ming Lee, Shwu-Huey Wang, Yu-Cheng Hsiao
Summary: The study shows that LMWHA-IONPs can effectively enhance MRI contrast for the early diagnosis of glioblastoma, with good targeting ability and biocompatibility towards tumor cells.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2021)
Article
Chemistry, Physical
Katarzyna Gajos, Andrzej Budkowski, Panagiota Petrou, Sotirios Kakabakos
Summary: The biosensor interface is crucial for biosensing devices and point-of-need platforms. Traditional biosensor response cannot differentiate between different surface modifications, while Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) can provide microanalysis and chemical imaging to solve this problem. ToF-SIMS allows control over molecular orientation and conformation, and can be used to optimize biosensor surface composition and biofunctionalization protocols. It provides more accurate characterization of molecular composition and allows verification of applied protocols and optimization of assay conditions. Furthermore, ToF-SIMS imaging can be used to study biomolecules printed into microarrays, biosensor arrays or separate biosensor components on a chip. It is hoped that these experimental developments using ToF-SIMS analysis methods will inspire future research in understanding complex surface phenomena.
APPLIED SURFACE SCIENCE
(2022)
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)