Article
Engineering, Chemical
Daniel Lay, Fengnian Shi, Christian Antonio
Summary: High Voltage Pulse (HVP) enabled ore preconcentration has the potential to save energy and improve the grade of Run-of-Mine ores. A patented grizzly-electrode design integrating pulse discharges for particle breakage and size-based separation has been developed to scale up the concept from laboratory to industrial application. The initial evaluation using synthetic particles and a low-grade gold-copper ore showed successful preconcentration and identified factors affecting system performance and limitations of the grizzly electrodes.
MINERALS ENGINEERING
(2023)
Article
Geology
Mathis Warlo, Glenn Bark, Christina Wanhainen, Iris McElroy, Alexander Bjorling, Ulf Johansson
Summary: In order to maximize profit and sustainability in mining operations, understanding the chemistry, mineralogy, texture, and structure of ores is essential. Synchrotron radiation X-ray fluorescence mapping provides high-resolution analysis potential for trace elements, but challenges in data acquisition and processing require careful human examination for complex geological samples.
ORE GEOLOGY REVIEWS
(2022)
Article
Environmental Sciences
Abdul Qayoom Memon, Shoaib Ahmed, Zulfiqar Ali Bhatti, Ghulamullah Maitlo, Abdul Karim Shah, Shaukat Ali Mazari, Atta Muhammad, Abdul Sattar Jatoi, Ghulam Abbas Kandhro
Summary: The indigenous hematite iron ore was chemically activated to remove arsenic efficiently under specific conditions. Langmuir and Freundlich isotherms were used to evaluate adsorption potential, with a maximum adsorption capacity observed through Langmuir isotherm. Kinetics of arsenic adsorption showed the best fit with pseudo-first-order kinetics. Characterization of the hematite iron ore before and after arsenic adsorption was conducted using XRD, SEM, and EDX.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Physics, Fluids & Plasmas
J. R. Wubs, U. Macherius, K-D Weltmann, X. Lue, B. Roeben, K. Biermann, L. Schrottke, H. T. Grahn, J. H. van Helden
Summary: This paper describes the first application of terahertz quantum cascade lasers for high-resolution absorption spectroscopy on plasmas. Absolute densities of ground state atomic oxygen were directly obtained by using the fine structure transition at approximately 4.75 THz. The presented method is well suited to measure atomic oxygen densities and closes the THz gap for quantitative atomic density measurements in harsh environments such as plasmas.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yun Xue, Yi-Min Wen, Zhong-Man Duan, Wei Zhang, Fen-Liang Liu
Summary: The study demonstrates that using the envelope removal method and spectral absorption characteristics of high-concentration samples can effectively invert the chlorophyll-a concentration in water bodies. The uncapped inversion model improves prediction accuracy, and the envelope removal method significantly amplifies the absorption characteristics of the spectrum.
Review
Environmental Sciences
Xuecheng Wu, Jianrong Wang, Chenxin Cai, Yingchun Wu, Chenghang Zheng, Yongxin Zhang, Xiang Gao
Summary: This article reviews measurement techniques for SO3 in flue gas, covering both chemical and spectroscopic methods. While chemical methods focus on efficient extraction and non-destructive measurement, spectroscopic methods stand out for their real-time response and detection limits.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Analytical
Tengpeng Liu, Jixin Liu, Xuefei Mao, Xudong Huang, Yongzhong Qian
Summary: In this work, a novel composite Pt/Ni trap was fabricated to trap Hg and Cd simultaneously, and a solid sampling Hg-Cd analyzer was developed using an MCH, a composite Pt/Ni trap, and an AFS. The Pt/Ni trap fulfilled the complete trapping and fast release of Hg and Cd. Under optimized conditions, the method detection limits of Hg and Cd reached 0.4 μg/kg and 0.04 μg/kg, the RSDs were within 12% and 8%, and the recoveries ranged from 96% to 105%. The proposed Hg-Cd analyzer is suitable for rapid detection of Hg and Cd in soil samples.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Fredrik Wikstrom, Carl Olsson, Bonita Palm, Niclas Roxhed, Lena Backlund, Martin Schalling, Olof Beck
Summary: The use of dried blood spots for the determination of lithium concentration is a feasible and accurate method for individual monitoring of lithium treatment. The volumetric technique for home-sampling can save resources, improve compliance, and enhance the safety of treatment. This method is particularly useful in regions where monitoring via venous blood sampling is difficult.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Ibrahim A. Darwish, Zongzhi Wang, Ryhan J. Darling, Nourah Z. Alzoman
Summary: This study describes the development of two highly sensitive and selective sensor-assisted fluorescence immunoassays for the trace determination of copper ions, Cu(ii) residues, in food samples. Both assays showed satisfactory accuracy and precision, and had significant advantages over conventional atomic spectrometric methods.
Article
Spectroscopy
Ignacio Lopez-Garcia, Maria J. Munoz-Sandoval, Manuel Hernandez-Cordoba
Summary: Silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) can be extracted from their ions using magnetic dispersive micro-solid phase extraction with non-functionalised ferrite particles. The extraction is based on controlling the acidity of the medium, without involving oxidation-reduction processes. The analytes are desorbed and determined by electrothermal atomization atomic absorption spectrometry. The method has a high enrichment factor, low detection limits, and good reproducibility.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Spectroscopy
Joanna Dobrzynska, Marzena Dabrowska, Ryszard Dobrowolski, Kinga Morlo
Summary: Pt(IV) ion-imprinted thiocyanato-functionalized SBA-15 material (Pt(IV)S1) was used for preconcentration of Pt(IV) ions from digested geological samples before ETAAS determination. The ion-imprinted material showed high adsorption affinity and selectivity towards Pt(IV) ions. The proposed procedure achieved a high enrichment factor of 38 and a low limit of quantification of 0.079 mg kg-1.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Review
Virology
Victoria Turzynski, Indra Monsees, Cristina Moraru, Alexander J. Probst
Summary: Viruses are the most abundant biological entities on Earth with profound impacts on global biogeochemical cycles through influencing microbial communities and host genome evolution. Imaging techniques play a crucial role in understanding virus biology and lifestyle, but uncultivated viruses are still poorly characterized.
Article
Chemistry, Analytical
Huimin Sun, Chunzhen Yang, Hong Wang
Summary: A simple, sensitive, and portable surface acoustic wave (SAW) biosensor was developed for the detection of mercury ions (Hg2+) with high sensitivity and selectivity. The linear detection range of the biosensor was 10 pM to 1 nM, with a low limit of detection (LOD) of 6.3 pM. This study provides a new strategy for the preparation of portable devices that can monitor toxic heavy metal ions.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Dong Zhi, Yu Chang, Long Huang, Wei Chen, Yunfei Li, Luping Wang, Lunhua Deng
Summary: This study utilized the alternating-current glow discharge technique to generate stable oxygen atom samples, and determined their absolute number density through absorption spectroscopy, making them suitable as standardized samples for concentration calibration.
Article
Spectroscopy
Yan Wu, Dingming Huang, Tong Feng, Lanlan Jin, Dan Xiong, Jie Yu, Qian Xu, Ruimin Huang, Shenghong Hu
Summary: An effective method for trace silver detection in geological samples was developed using aerosol dilution inductively coupled plasma-mass spectrometry after extraction with inverse aqua regia to reduce interference from Nb and Zr. The method was successfully applied to determine silver levels in various geological samples with promising accuracy.
ATOMIC SPECTROSCOPY
(2021)
Article
Spectroscopy
Laurence Whitty-Leveille, Elisabeth Drouin, Marc Constantin, Claude Bazin, Dominic Lariviere
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2016)
Article
Geochemistry & Geophysics
Brian Cousens, Dominique Weis, Marc Constantin, Steve Scott
GEOCHIMICA ET COSMOCHIMICA ACTA
(2017)
Article
Spectroscopy
Kheireddine Rifai, Marcel Laflamme, Marc Constantin, Francois Vidal, Mohamad Sabsabi, Alain Blouin, Paul Bouchard, Konstantinos Fytas, Maryline Castello, Blandine Nguegang Kamwa
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2017)
Article
Engineering, Environmental
Ali Nowamooz, J. Christian Dupuis, Georges Beaudoin, John Molson, Jean-Michel Lemieux, Micha Horswill, Richard Fortier, Faical Larachi, Xavier Maldague, Marc Constantin, Josee Duchesne, Rene Therrien
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Geochemistry & Geophysics
Gabriel Cote, Abdelali Moukhsil, Marc Constantin, Jean David
Article
Geochemistry & Geophysics
Nessrine Mohamed, Kheireddine Rifai, Samira Selmani, Marc Constantin, Francois R. Doucet, Lutfu C. Ozcan, Mohamad Sabsabi, Francois Vidal
Summary: The emerging fast laser-induced breakdown spectroscopy (LIBS) technique shows great potential for mineral exploration, providing direct, fast, and high-resolution mapping of chemical and mineral composition. LIBS has the advantages of faster speed and greater sensitivity to trace elements (e.g., Pd) and low atomic number elements.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2021)
Article
Geochemistry & Geophysics
Kheireddine Rifai, Marc Constantin, Adnan Yilmaz, Luetfue C. Ozcan, Francois R. Doucet, Nawfel Azami
Summary: This article reports on the quantification of lithium and mineralogical mapping in crushed lithium ore using laser-induced breakdown spectroscopy (LIBS) with two different calibration methods. The results demonstrate the feasibility of using LIBS for analyzing crushed ore samples and mapping the mineral distribution.
Article
Spectroscopy
Samira Selmani, Nessrine Mohamed, Ismail Elhamdaoui, Jordan Fernandes, Paul Bouchard, Marc Constantin, Mohamad Sabsabi, Francois Vidal
Summary: This study demonstrates the applicability of laser-induced breakdown spectroscopy (LIBS) as a large-scale, high-performance analyzer for assessing the palladium content in ore. The analysis reveals the significant heterogeneity of palladium distribution on the ore's surface.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Instruments & Instrumentation
Ismail Elhamdaoui, Samira Selmani, Mohamad Sabsabi, Marc Constantin, Paul Bouchard, Francois Vidal
Summary: The measurement of platinum and palladium concentrations using laser-induced breakdown spectroscopy assisted by laser-induced fluorescence (LIBS-LIF) method was studied. The method showed good linearity and low detection limit for platinum, while the conventional LIBS method failed to meet the requirements. The platinum concentrations obtained from LIBS-LIF on solid ore were generally in agreement with laboratory measurements, while the results for palladium showed less satisfactory agreement.
APPLIED SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Ismail Elhamdaoui, Nessrine Mohamed, Samira Selmani, Paul Bouchard, Mohamad Sabsabi, Marc Constantin, Francois Vidal
Summary: This paper discusses the use of conventional LIBS and LIBS-LIF techniques for measuring trace amounts of palladium in solid ore samples. The study optimized the performances of LIBS-LIF for spectrochemical analysis of palladium by studying the combination of excitation/fluorescence of Pd lines and plasma creation conditions. Calibration curves were established using reference materials doped with a palladium solution. The results demonstrated that LIBS-LIF could rapidly measure sub-ppm levels of palladium in solid ore samples without any sample preparation, and it could resolve the spectral interference which is problematic with conventional LIBS.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Proceedings Paper
Green & Sustainable Science & Technology
Georges Beaudoin, Ali Nowamooz, Gnouyaro Palla Assima, Karl Lechat, Antoine Gras, Ali Entezari, El Hadji Babacar Kandji, Akue-Sylvette Awoh, Micha Horswill, Sara Turcotte, Faical Larachi, Christian Dupuis, John Molson, Jean-Michel Lemieux, Xavier Maldague, Benoit Plante, Bruno Bussiere, Marc Constantin, Josee Duchesne, Rene Therrin, Richard Fortier
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
(2017)
Proceedings Paper
Geology
Maryline Castello, Marc Constantin, Marcel Laflamme, Kheireddine Rifai, Blandine Nguegang Kamwa
MINERAL RESOURCES TO DISCOVER, VOLS 1-4
(2017)
Proceedings Paper
Geology
Blandine Nguegang Kamwa, Marcel Laflamme, Marc Constantin, Kheireddine Rifai, Maryline Castello, Konstantinos Fytas
MINERAL RESOURCES TO DISCOVER, VOLS 1-4
(2017)
Proceedings Paper
Geology
Anne-Aurelie Sappin, Georges Beaudoin, Ross Stevenson, Marc Constantin
MINERAL RESOURCES TO DISCOVER, VOLS 1-4
(2017)
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)
