Article
Chemistry, Physical
Weiquan Zhan, Siyuan Yang, Shenxu Bao, Liuyi Ren, Cheng Liu
Summary: The interaction between talc and the depressor CMC was investigated through molecular dynamics simulation and density functional theory calculation. It was found that CMC showed stronger adsorption on the edge plane of talc due to enhanced interactions with polar groups and water molecules. The study also revealed specific interactions between H atoms in CMC and O atoms in the edge plane, as well as between O atoms in CMC and Si, Mg atoms in the edge plane. Hydration shells on the basal and edge planes of talc were examined to explain the phenomenon.
APPLIED CLAY SCIENCE
(2024)
Article
Engineering, Chemical
S. J. Neethling, D. Mesa, P. R. Brito-Parada
Summary: In this paper, a model for froth recovery that incorporates the effects of detachment and subsequent transport of particles is presented. The model is compared to experimental results and shown to accurately describe the evolution of froth recovery behavior under decreasing froth stability.
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
Chemistry, Physical
M. J. Martin-Alfonso, A. Mejia, F. J. Martinez-Boza, P. Partal
Summary: The drilling industry is facing new challenges to develop eco-friendlier drilling fluids. Organic modified sepiolite dispersed in oil can be an excellent additive with suitable rheological properties. This study investigated the effect of alkyl ammonium modifiers on the microstructure and rheological properties of sepiolite-vegetable oil dispersions under high-temperature and high-pressure conditions.
APPLIED CLAY SCIENCE
(2024)
Article
Engineering, Chemical
Wei Liu, Zhongqing Xiao, Subodh Das, Wencai Zhang
Summary: This study conducted direct acid leaching to recover rare earth elements from an allanite ore, and examined the effects of operational variables on the extraction efficiency. The results showed that under certain conditions, the extraction efficiency of rare earth elements was high.
MINERALS ENGINEERING
(2024)
Article
Engineering, Chemical
Haoyu Li, Qian Ren, Jinfeng Tian, Shihong Tian, Jun Wang, Xuejun Zhu, Yuanhong Shang, Jiayuan Liu, Liping Fu
Summary: This study compares the conventional leaching process with the ultrasound-H2O2 synergistic enhanced process for extracting residual vanadium from calcification roasted-acid leaching tailings, and optimizes the experimental parameters. The findings show that the ultrasound-H2O2 synergistic vanadium leaching process increases the leaching rate by 63.64% and reduces energy consumption by 50%. The enhancement mechanism is attributed to the effective decomposition of H2O2 into center dot OH radicals under ultrasound, which provides higher oxidation potential and accelerates the reaction process. The process also enhances cavitation effects and increases the reaction area by destroying the composite oxide structure on the surface of the tailing particles. In conclusion, the ultrasound-H2O2 synergistic vanadium leaching process holds great potential in the management and recovery of industrial tailings.
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
Geochemistry & Geophysics
Huichuan Liu, Alan R. Hastie, Chiara Maria Petrone
Summary: This study conducted isotope analyses on two ocean island basalt (OIB)-associated enriched mafic intrusions in the Yunnan-Burma region, and found that these rocks may have originated from the subduction recycling of marine sediments and altered oceanic crust.
Article
Materials Science, Multidisciplinary
Georg Klepp
Summary: One possibility for energy storage is using fuels like hydrogen or methane, but feasible storage methods are needed. Storage by adsorption in porous media using nano-carbons, metal-organic frameworks, or metal hydrides as adsorbents is an alternative to high-pressure or cryogenic gas storage. Digital twins based on machine learning are being developed to simplify the analysis and prediction of the models. Assessing the performance of the adsorption tanks requires considering mass and energy balance, phase equilibrium, and spatial distribution of properties.
Article
Geochemistry & Geophysics
Ali Aluc, Ilkay Kuscu, Alexey Ulyanov, David Selby, Clementine Antoine, Richard Spikings, Robert Moritz
Summary: The Kirazil deposit is an important ore deposit located in the Biga Peninsula, characterized by high-sulfidation and porphyry Cu mineralization. The study demonstrates a long-lasting Cenozoic magmatic and metallogenic evolution of the deposit. Furthermore, it shows that various hydrothermal and porphyry systems have been active at the same location during the extensional tectonics of the Biga Peninsula.
MINERALIUM DEPOSITA
(2023)
Article
Geochemistry & Geophysics
Liang Li, Wenjiao Xiao, Brian F. Windley, Guochun Zhao, He Yang, Miao Sang, Xiaoliang Jia
Summary: In this study, two dioritic plutons in the Harlik arc of the Altaids were examined to understand the accumulation-foundering cycles of dense ultramafic cumulates. By analyzing their age and composition, it was found that these plutons played a significant role in the formation of andesitic crust and contributed to the continental crustal growth in the Altaids.
Article
Chemistry, Physical
Amber Jie Yu, Xiaoju Lin, Jianxi Zhu, Hongping He, Long Li
Summary: Clay minerals have a significant impact on Earth's nitrogen cycle and the synthesis of organic compounds. We conducted laboratory experiments to examine the adsorption behavior of clay minerals under different environmental conditions. The results indicate that the adsorption capacity of clay minerals is dependent on the mineral type, pH, temperature, and salinity. Vermiculite and montmorillonite have higher adsorption capacities due to their ability to adsorb ammonium in interlayer sites.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
Gianfranco Ulian, Giovanni Valdre
Summary: This study provides a detailed characterization of the structural, vibrational, and electronic properties of 1M-phlogopite, specifically focusing on the influence of iron content. By using density functional theory simulations, it was found that the different phlogopite models agree well with experimental data and provide additional insights into atomic motions.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
Toshihiro Sakaki, Keisuke Sakabayashi, Ken Kawamoto, Thomas Spillmann
Summary: Sand-bentonite (SB) mixtures are commonly used as backfill materials in nuclear waste repositories. The dry density of the SB mixture plays a crucial role in determining its hydraulic and mechanical properties. Both laboratory and field studies demonstrate that dynamic compaction can result in significant variations in dry density, affecting the overall performance of the backfill. It is important to collect samples from different depths to accurately assess the global dry density.
APPLIED CLAY SCIENCE
(2023)
Article
Geochemistry & Geophysics
Rong Yin, Xiao-Long Huang, Ru-Cheng Wang, Gang-Jian Wei, Yi-Gang Xu, Yu Wang, Xiao-Ming Sun, Le Zhang, Xiao-Ping Xia
Summary: LCT-type pegmatites are characterized by zoning texture and extreme enrichment of rare-metals. Tourmaline is ubiquitously present in all textural zones and exhibits a range of compositions. The decreasing δ11B values of tourmalines from outer to inner zones are attributed to the separation of an immiscible fluid phase. The occurrence of hydrothermal tourmaline indicates the exsolution of fluids, facilitating the precipitation of rare-metal minerals. Fractional crystallization and exsolved fluids play significant roles in the formation of internal zones and rare-metal mineralization in LCT-type pegmatites.
Article
Chemistry, Physical
Hyeon-Ju Ryu, Ji-Hee Lee, J. Yoon Choi, Goeun Choi, N. Sanoj Rejinold, Jin-Ho Choy
Summary: In this study, an eco-friendly flame retardant was developed using polypropylene and ionic nanofillers, which were able to enhance the thermo-mechanical strength and significantly reduce the peak heat release rate of the original polypropylene.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
John de Bono, Glenn McDowell
Summary: The mechanical behavior of sands and clays under normal compression is similar despite the differences in inter-particle interactions. However, the hysteretic behavior of clay is very different, exhibiting springy hysteresis loops and ratchetting volumetric compaction.
APPLIED CLAY SCIENCE
(2023)
Article
Geochemistry & Geophysics
Barun Maity, Graham D. Layne, Fred J. Longstaffe
Summary: This study investigates the petrogenesis and tectonic environments of ca. 980 Ma potassic to ultrapotassic dykes (PUD) from the Canyon domain in central Grenville Province, Canada, using whole-rock Sr-Nd-Pb-O isotope data and previously published results. The results reveal the diverse origins of the PUD dykes, involving both fertile and depleted sources, and significant impact of ancient subduction. The latest phase of fluid/melt metasomatism during the late-Grenvillian tectonic setting also plays an important role.
Article
Geochemistry & Geophysics
Omer Faruk Celik, Rahmi Melih Cortuk, Mutlu Ozkan, Joshua H. F. L. Davies, Andrea Marzoli, Sarah C. Sherlock, Andrea Risplendente, Alison M. Halton, Morgann G. Perrot
Summary: This article examines the high pressure-low temperature metamorphic rocks in Tavs, Anli, and Afyon regions of western Turkey and finds that the metamorphic units in Korumaz and Hinzir mountains are connected to the Afyon and Tavs,anli zones. It also confirms the existence of the Inner Tauride Ocean.
Article
Geochemistry & Geophysics
Chang Zhang, Chuan-Zhou Liu, Wen-Bin Ji, Tong Liu, Zhen-Yu Zhang, Fu-Yuan Wu
Summary: Ridge subduction is an inevitable process during the evolution of a vanished ocean, and studying it can provide valuable insights into the evolution of oceanic lithosphere. This study reveals that certain rocks in ophiolitic melanges are formed under high geothermal gradients. Additionally, intruding dykes and their metamorphic soles have the same ages, indicating rapid exhumation of these rocks.
