Article
Geochemistry & Geophysics
Asif Ali, Yi Wai Chiang, Rafael M. Santos
Summary: X-ray diffraction (XRD) is an important and widely used material characterization technique, but further improvements are needed in its characterization capabilities, especially for complex mineral structures. This review comprehensively discusses the principles, applications, uncertainties, and safety precautions of XRD, and explores the future research directions of using artificial intelligence and machine learning tools to enhance the effectiveness and accuracy of XRD technique.
Article
Geochemistry & Geophysics
Karen L. Scrivener, Ruben Snellings
Summary: This chapter tells the story of Portland cement, from its invention to its development today. The success of Portland cement lies in its abundant raw materials, the reactivity of high-temperature clinker with water, and the properties of the hydration products. However, reducing CO2 emissions remains a major challenge, and options include replacing clinker with low-carbon resources, efficient use of cement and concrete products, and carbon capture and storage or use.
Article
Geochemistry & Geophysics
Liming Qiu, Yi Zhu, Dazhao Song, Xueqiu He, Weixiang Wang, Yang Liu, Yuzhe Xiao, Menghan Wei, Shan Yin, Qiang Liu
Summary: Coal and rock dynamic disasters pose a serious threat to miner safety and industrial production. The refined nonlinear characteristics of electromagnetic radiation (EMR) and acoustic emission (AE) during coal splitting failure were studied using Hilbert-H and multifractal theory, revealing valuable information about coal fracture law. The research showed that EMR and AE during coal splitting failure are related to the process of coal crack propagation, with similar initiation time and frequency band. However, EMR has a longer signal duration and lower frequency compared to AE. The research provides an effective method for studying the nonlinear refinement characteristics of coal EMR and AE.
Article
Engineering, Chemical
Xun Wang, Bing Zhao, Jie Liu, Yimin Zhu, Yuexin Han
Summary: In this study, dithiouracil was successfully used as a chalcopyrite depressant to separate molybdenite, with the mechanism of depression explored through various analytical methods. The results indicate that dithiouracil can be a highly effective depressant for chalcopyrite, offering potential for Cu-Mo flotation separation.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Wei Ding, Shenxu Bao, Yimin Zhang, Junhui Xiao
Summary: This study systematically investigated the effect and mechanism of ultrasound on the leaching of gallium and zinc from corundum flue dust (CFD). The results showed that ultrasound could significantly increase the leaching efficiencies of gallium and zinc. The enhancement of ultrasound was attributed to the breaking of particle agglomerates, improving sulfuric acid diffusion, and accelerating the reaction between sulfuric acid and amorphous silicate.
MINERALS ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Jiajian Li, Shuai Cao, Erol Yilmaz
Summary: This study investigated the macro and micromechanical properties of backfilling materials made using solid wastes. The findings identified factors that affect the mechanical properties of these materials. The research results provide valuable scientific reference for the preparation of backfilling materials.
Review
Chemistry, Physical
Dorsaf Cheikh, Hatem Majdoub, Margarita Darder
Summary: By functionalizing clay-polymer nanocomposites with natural bioactive compounds found in plants, the physicochemical and functional properties of resulting films and coatings can be improved for potential applications in food protection. The presence of clays in food packaging provides advantages such as stabilizing bioactive compounds, controlled release, moisture barrier properties, and enhancing mechanical properties of the polymer matrix. This review highlights insights on functionalizing clay-based nanocomposites with natural additives extracted from plants for food quality and safety applications.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Lianyang Zhang, Yue Meng, Tiantian Dai, Yiyang Yao, Hui Shen, Bo Xie, Zheming Ni, Shengjie Xia
Summary: The construction of a BiVO4@LDHs Z-scheme heterojunction, with BiVO4 as the core and LDHs as the shell, enables efficient photocatalytic degradation of norfloxacin. The optimized conditions achieved a removal rate of 90.3%. The core-shell structure enhances the specific surface area, improves the band structure alignment, and produces enough radicals for efficient degradation.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Bingxiang Yuan, Weijie Chen, Jin Zhao, Lijuan Li, Feng Liu, Yongchang Guo, Baifa Zhang
Summary: This paper investigates possible methods to reinforce granite residual soil (GRS) using fiber and/or alkaline solutions. The study finds that specific molar ratios of alkaline solutions significantly enhance the static mechanical properties of GRS, and glass fibers outperform basalt fibers in improving the impact resistance of GRS. The findings suggest that appropriately reinforced waste GRS could be used for constructing high-strength foundations and embankments.
APPLIED CLAY SCIENCE
(2022)
Review
Engineering, Chemical
Deniz Talan, Qingqing Huang
Summary: Rare earth elements (REEs) are crucial for technology and defense industries, but the environmental impact of rare earth mining has not been thoroughly studied. This review summarizes the environmental consequences of rare earth extraction processes and discusses separation techniques for radioactive materials from rare earths.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Jamal Ait Brahim, Sara Ait Hak, Brahim Achiou, Rachid Boulif, Redouane Beniazza, Rachid Benhida
Summary: This review focuses on the kinetics of extracting REEs from secondary resources, providing insights into leaching kinetics and mechanisms. The study reviews various kinetics approaches, models, and parameters influencing kinetics. Comparative analysis of different REEs secondary resources is also conducted.
MINERALS ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Marco Brenna, Shane J. Cronin, Ian E. M. Smith, Alessio Pontesilli, Manuela Tost, Simon Barker, Sisi Tonga'onevai, Taaniela Kula, Rennie Vaiomounga
Summary: Intra-oceanic arcs are typically associated with intermediate cone volcanoes, but caldera volcanoes may also form in these settings. Hunga volcano is a large mainly submarine edifice that produced a series of caldera-forming eruptions. Numerous smaller-scale eruptions have occurred since then, forming new islands in 2009 and 2014/15. The composition of the recent eruptions is similar to the caldera-forming episodes.
Article
Engineering, Chemical
Lei Zhang, Xue-yi Guo, Qing-hua Tian, Dong Li, Shui-ping Zhong, Hong Qin
Summary: Non-cyanide gold leaching combined with mechanical activation and the addition of sodium lignosulfonate proved to be an efficient and promising method for gold extraction, showing potential for scaling up.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Yan Zhang, Mingyao Cui, Jianguo Wang, Xiaoliang Liu, Xianjun Lyu
Summary: Cyanide is highly toxic and poses environmental risks in gold extraction. Extensive research has been conducted to find eco-friendly alternatives, leading to the successful development of novel synthetic gold lixiviants (NESGLs) such as Jinchan. These NESGLs are less toxic compared to cyanide and have achieved comparable gold recoveries without altering the cyanidation process. The growing industrial applications of NESGLs suggest a potential shift away from cyanide dominance.
MINERALS ENGINEERING
(2022)
Review
Chemistry, Physical
Dina Ewis, Muneer M. Ba-Abbad, Abdelbaki Benamor, Muftah H. El-Naas
Summary: This review assesses the application of clay and clay mineral composites in treating organic water pollutants and discusses the impact of the composites' physicochemical properties on their adsorption performance and regeneration methods. It also summarizes the current progress in this field and outlines future research directions.
APPLIED CLAY SCIENCE
(2022)
Article
Engineering, Chemical
Wenjuan Zhao, Meili Wang, Bin Yang, Qicheng Feng, Dianwen Liu
Summary: Copper-ammonium species were introduced to improve surface sulfidization and flotation performance, showing superior activation compared to individual copper ions. This improved reactivity between the mineral surface and sulfide and xanthate species. The research results provide a potential technology for efficient recovery of zinc oxide minerals through sulfidization xanthate flotation.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Ahmad Hassanzadeh, Mehdi Safari, Duong H. Hoang, Hamid Khoshdast, Boris Albijanic, Przemyslaw B. Kowalczuk
Summary: This paper critically evaluates the two different strategies in ore flotation processing: the classical mechanical flotation cells and the new flotation apparatuses. Through a comprehensive comparative study, it is found that the traditional mechanical cells are suitable for fine particle flotation, while the new apparatuses such as Jameson and RefluxTM flotation cells are highly efficient in recovering fine particles. In addition, fluidized bed and HydroFloatTM cells are suitable for coarse particle recovery.
MINERALS ENGINEERING
(2022)
Article
Chemistry, Physical
Jiaqi Chang, Xiaodong Fan, Zhenxue Jiang, Xingmeng Wang, Lei Chen, Jitong Li, Lin Zhu, Chengxiang Wan, Zhixiang Chen
Summary: This study investigated the effects of organic matter, clay minerals and organo-clay composites on the pore structure and pore complexity of shale reservoirs. The results showed that the type and maturity of macerals, illite, kaolinite, and organo-clay composites are the main factors influencing shale pore development. The study also found that different clay mineral types have different effects on shale pore structure and pore complexity.
APPLIED CLAY SCIENCE
(2022)
Article
Geochemistry & Geophysics
Jeffrey W. Hedenquist, Antonio Arribas
Summary: This article examines the formation environments of advanced argillic minerals and their significance in the exploration and assessment of hydrothermal ore deposits. Five different geological environments are identified as the sources of these minerals, which play a crucial role in the formation of hydrothermal ore deposits at depths below 500 meters.
Article
Geochemistry & Geophysics
Panlao Zhao, Shunda Yuan, Anthony E. Williams-Jones, Rolf L. Romer, Chen Yan, Shiwei Song, Jingwen Mao
Summary: Tungsten and Sn behave similarly during magmatic processes and are commonly associated with highly evolved granites. However, they typically form separate deposits, possibly due to metal fractionation or differential mobility during partial melting of the metasedimentary protolith. New age data shows that W and Sn mineralization occurred at different times, ruling out fractionation as an explanation for their spatial separation. The different melting paths of the granites suggest that W and Sn were mobilized differently during partial melting, resulting in their spatial separation.
