Article
Energy & Fuels
Ali Ihsan Karayigit, Riza Gorkem Oskay, Yakup celik
Summary: The late Oligocene coal seams in the Malkara coal field are influenced by vegetation and detrital input ratio, exhibiting high TOC and high hydrogen content, mainly generating natural gas. The Rock-Eval pyrolysis data should be used cautiously and verified with traditional coal parameters to avoid misinterpretations.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Multidisciplinary Sciences
Yang Yang, Bin Xiong, Sanxi Peng, Siqin Liu, Hanbo Chen, Tianyu Zhang
Summary: This paper summarizes the mechanism and impact of magmatic rock intrusion into coal seams, introduces the characteristics and detection method of transient electromagnetic method (TEM), and analyzes its effectiveness in detecting the ranges of intruded coal seams.
Article
Geosciences, Multidisciplinary
Francesco Perri, Salvatore Milli, Gloria Campilongo, Daniel Tentori, Salvatore Critelli
Summary: The study of mudstones from the late Tortonian to early Messinian Agnone Flysch turbidite successions in the southern Apennines reveals a complex sedimentation history with a multi-source area, likely due to structural changes and depositional basin physiography. Analysis of geochemical and mineralogical signatures show variations in composition, indicating a change in relative abundance of detritus characterized by different compositions through time and space. The obtained data suggest a moderate palaeoweathering in source areas and a provenance from western, north-western, and south-western sectors of the basin.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Fangkai Quan, Chongtao Wei, Shuqing Hao, Jingsheng Ma, Yu Song, Da Lian
Summary: This study analyzes the mechanisms and effects of interlayer interference in coal-bed methane co-production, and validates the effectiveness of placing co-production wells in the well-pattern.
NATURAL RESOURCES RESEARCH
(2022)
Article
Energy & Fuels
Yunfei Shangguan, Xinguo Zhuang, Xavier Querol, Baoqing Li, Jing Li, Natalia Moreno, Pedro Trechera, Patricia Cordoba Sola, Gaelle Uzu
Summary: This study systematically investigates the mineralogical and geochemical variations in different sources of dust in an underground coal mine in China. It found that coal gangue is the major source of deposited dust, and organic species from coal dust contribute significantly to oxidative potential.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Energy & Fuels
Yunwen Guan, Qijun Guo, Renhai Pu, Xiaoping Gao, Shuo Chen, Tianyu Ji
Summary: The Ordos Basin in China has abundant coal resources in the Upper Paleozoic strata, with shallowly buried or exposed coal mines in the periphery of the basin. Deeply buried coal seams have been less studied due to complex changes and difficult mining. Recent accumulation of drilling and seismic data in the southeastern Ordos Basin has allowed for a study of the distribution change and factors controlling Upper Paleozoic coal seams.
Article
Energy & Fuels
Yunfei Shangguan, Xinguo Zhuang, Xavier Querol, Baoqing Li, Natalia Moreno, Pedro Trechera, Patricia Cordoba Sola, Gaelle Uzu, Jing Li
Summary: This study investigates the potential toxicity of deposited dust in low-S and low-pyrite coal mines using two complementary oxidative potential assays. The results show that the oxidative potential of the respirable fraction (DD4) of the dust is mainly controlled by trace elements and minor minerals. The sources of substances relevant to oxidative potential include coal dust, gangue dust, and cement dust.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Energy & Fuels
Pedro Trechera, Teresa Moreno, Patricia Cordoba, Natalia Moreno, Xinguo Zhuang, Baoqing Li, Jing Li, Yunfei Shangguan, Ana Oliete Dominguez, Frank Kelly, Xavier Querol
Summary: This study analyzed the characteristics and differences in particle size and composition of deposited coal mine dust in open-pit mine areas, indicating the impact of different mining operations and mine areas on air pollutant levels. It also emphasized the importance of extracting more deeply respirable size fraction of coal mine dusts for future research.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Energy & Fuels
Maria Wetzel, Christopher Otto, Min Chen, Shakil Masum, Hywel Thomas, Tomasz Urych, Bartlomiej Bezak, Thomas Kempka
Summary: Deep un-mineable coal deposits have a high potential for storing carbon dioxide (CO2) due to their ability to adsorb large amounts of CO2. However, there are geomechanical risks associated with CO2 storage, such as fault reactivation and ground surface uplift. This study assessed the hydromechanical impacts of CO2 storage in a coal deposit by using numerical simulations. The results showed minimal vertical displacements and no fault slip or dilation, but it is important to accurately determine the stress regime and fault properties for a comprehensive risk assessment.
Article
Multidisciplinary Sciences
Bowen Ling, Mo Sodwatana, Arjun Kohli, Cynthia M. Ross, Adam Jew, Anthony R. Kovscek, Ilenia Battiato
Summary: Mineral dissolution has significant impacts on geological systems, but current experimental techniques limit direct observation of dissolution reactions in spatially heterogeneous rocks. This study utilizes microfluidic cells and thin rock samples to visualize dissolution with high temporal resolution and large observation window. The dynamics of dissolution and changes in fracture interfaces are revealed through observation of microstructure variations in rocks. Additionally, a method for characterizing reactivity parameters of natural heterogeneous rocks is provided.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Jingna Xie, Jun Xie, Bingyou Jiang, Qian Sun
Summary: This paper investigates the surface tension and contact angle characteristics of a composite acid wetting agent, finding that surfactants can reduce water surface tension. The developed wetting agent based on the research results can improve coal wetting and infiltration.
Article
Energy & Fuels
Bin Ji, Qi Li, Wencai Zhang
Summary: The mineralogy of rare earth elements in Western Kentucky No. 13 and Fire Clay coal waste was studied, revealing that monazite, xenotime, and crandallite-group minerals were the major contributors to the total REE contents in both materials. The majority of the REEs, especially the light REEs, in the Fire Clay coal waste occurred as monazite and xenotime particles, while a larger portion of the heavy REEs in the Fire Clay material were comprised in zircon.
Article
Energy & Fuels
Quanshu Zeng, Zhiming Wang, Tianhao Huang
Summary: Understanding the sensitivity of permeability to stress and temperature can help predict permeability distribution and reveal the relationship between permeability and temperature changes. The experimental results show that coal permeability decreases exponentially with increasing stress, and the impact of temperature on permeability varies depending on the stress level. Additionally, the study suggests that the permeability change with temperature may reverse at specific stress points.
Article
Chemistry, Physical
Saurabh Shekhar, V Kumari, S. Sinha, D. Mishra, A. Agrawal, K. K. Sahu
Summary: This study presents a detailed physicochemical characterization of glauconite in the Kutch district, India, highlighting its economic potential and high degree of maturation. The study provides preliminary data sets for further evaluation and utilization of glauconite.
CLAYS AND CLAY MINERALS
(2022)
Review
Chemistry, Multidisciplinary
Meng Wu, Yong Qin, Yuanyuan Zhang, Shifei Zhu, Guchun Zhang, Fengjuan Lan, Xuejuan Song, Lele Feng, Yunhu Qin
Summary: This study examines the importance of geological CO2 sequestration in coal seams for coalbed methane development and greenhouse gas mitigation. Suitable geological conditions for CO2 sequestration include specific burial depths, permeability, caprock and floor strata characteristics, and coal type. Geological structures, shallow freshwater layers, and complex hydrological conditions should be avoided. The engineering conditions of temperature, pressure, and storage time are also important considerations. Feasibility evaluation of CO2 geological storage in coal seams requires a comprehensive understanding of coalfield geological factors. Site selection evaluation integrating principles feasibility, injection controllability, sequestration security, and development economy can optimize the sequestration area and provide rational CO2 geological storage layout recommendations.
Article
Geology
Jing Li, Yang Lin, Xuanphu Nguyen, Xinguo Zhuang, Baoqing Li, Xavier Querol, Natalia Moreno, Patricia Cordoba
Summary: This paper investigates the mineralogical and geochemical characteristics of the Upper Triassic coal from the Nui Hong open-pit mine in Vietnam, and focuses on the enrichment of strategic metals in coal. The study finds significant enrichment of Mo, U, Ge, and Cs in the Nui Hong coal, which suggests the economic potential for extracting these metals from the coal. The Ge enrichment in the Nui Hong coal provides new insights for prospecting coal-hosted Ge deposits in high-rank coal.
ORE GEOLOGY REVIEWS
(2023)
Article
Environmental Sciences
Marten in't Veld, M. Pandolfi, F. Amato, N. Perez, C. Reche, P. Dominutti, J. Jaffrezo, A. Alastuey, X. Querol, G. Uzu
Summary: This study investigated the oxidative potential (OP) of ambient particulate matter (PM) in Barcelona and Montseny in Spain. The results showed that the OP of PM10 in Barcelona was much higher than that of PM2.5 and PM1, while in Montseny, the OP of all PM sizes was in the same range but significantly lower. The OP of PM in Barcelona was mainly driven by anthropogenic sources, while in Montseny, no clear drivers were identified.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Alon Khabra, Haim Cohen, Gad A. Pinhasi, Xavier Querol, Patricia Cordoba Sola, Tomer Zidki
Summary: Sulfur and nitrogen oxides (SOX/NOX) emissions from fuel combustion are major air toxic gas pollutants. Existing technologies for reducing SOX/NOX content are costly and require high operating temperatures. This study proposes SiO2/Co(OH)(2) nanocomposites as potential catalysts for SOX/NOX oxidation at lower temperatures using atmospheric oxygen as the oxidant, replacing expensive and hazardous oxidants. The nanocomposites exhibited excellent catalytic properties, suggesting their potential for simultaneous scrubbing of polluting gases in flue gases.
Article
Immunology
Lidia Morawska, William Bahnfleth, Philomena M. Bluyssen, Atze Boerstra, Giorgio Buonanno, Stephanie J. Dancer, Andres Floto, Francesco Franchimon, Charles Haworth, Jaap Hogeling, Christina Isaxon, Jose L. Jimenez, Jarek Kurnitski, Yuguo Li, Marcel Loomans, Guy Marks, Linsey C. Marr, Livio Mazzarella, Arsen Krikor Melikov, Shelly Miller, Donald K. Milton, William Nazaroff, Peter Nielsen, Catherine Noakes, Jordan Peccia, Xavier Querol, Chandra Sekhar, Olli Seppanen, Shin-ichi Tanabe, Raymond Tellier, Tham Kwok Wai, Pawel Wargocki, Aneta Wierzbicka
Summary: This is an important account of a struggle in which a group of experts came together at the beginning of the COVID-19 pandemic to warn the world about the risk of airborne transmission and the consequences of ignoring it. Their concerns were dismissed by the World Health Organization, but later acknowledged when published in an international journal. The delay in acknowledging this issue had widespread consequences throughout the pandemic.
CLINICAL INFECTIOUS DISEASES
(2023)
Article
Environmental Sciences
Jordi Massague, Miguel Escudero, Andres Alastuey, Enrique Mantilla, Eliseo Monfort, Gotzon Gangoiti, Carlos Perez Garcia-Pando, Xavier Querol
Summary: This study evaluates the spatial variation and trends of ground-level ozone (O3) in Spain to support the country's Ozone Mitigation Plan. The results show that O3 spatial variation depends on the part of the O3 distribution being analyzed. The study proposes a classification of atmospheric regions in Spain based on O3 pollution patterns, highlighting priority areas for O3 mitigation. The trends assessment reveals varying O3 trends among different hotspots, emphasizing the importance of designing local/regional mitigation measures.
ENVIRONMENT INTERNATIONAL
(2023)
Review
Environmental Sciences
Kaung Suu Lwin, Aurelio Tobias, Paul Lester Chua, Lei Yuan, Ramita Thawonmas, Sophearen Ith, Zin Wai Htay, Lin Szu Yu, Lisa Yamasaki, Marta Roque, Xavier Querol, Julia C. Fussell, Kari Christine Nadeau, Massimo Stafoggia, Najat A. Saliba, Chris Fook Sheng Ng, Masahiro Hashizume
Summary: This scoping review aims to identify the most likely health effects of desert dust and sandstorms and the methods used to characterize desert dust exposure. Over half of the studies reported significant associations between desert dust and adverse health effects, mainly for respiratory and cardiovascular mortality and morbidity causes. However, there are significant limitations in exposure measurement and statistical analysis in the existing epidemiological studies, potentially contributing to inconsistencies in determining the effect of desert dust on human health.
Article
Environmental Sciences
Marta Via, Jesus Yus-Diez, Francesco Canonaco, Jean-Eudes Petit, Philip Hopke, Cristina Reche, Marco Pandolfi, Matic Ivancic, Martin Rigler, Andre S. H. Prevot, Xavier Querol, Andres Alastuey, Maria Cruz Minguillon
Summary: In this study, the multi-time resolution (MTR) Positive Matrix Factorization (PMF) technique was applied to identify eight PM1 pollution sources in Barcelona, Spain, by combining high and low time resolution data. This approach proved to be more accurate and effective compared to conventional methods.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Marjan Savadkoohi, Marco Pandolfi, Cristina Reche, Jarkko V. Niemi, Dennis Mooibroek, Gloria Titos, David C. Green, Anja H. Tremper, Christoph Hueglin, Eleni Liakakou, Nikos Mihalopoulos, Iasonas Stavroulas, Begona Artinano, Esther Coz, Lucas Alados-Arboledas, David Beddows, Veronique Riffault, Joel F. De Brito, Susanne Bastian, Alexia Baudic, Cristina Colombi, Francesca Costabile, Benjamin Chazeau, Nicolas Marchand, Jose Luis Gomez-Amo, Victor Estelles, Violeta Matos, Ed van der Gaag, Gregory Gille, Krista Luoma, Hanna E. Manninen, Michael Norman, Sanna Silvergren, Jean-Eudes Petit, Jean-Philippe Putaud, Oliver V. Rattigan, Hilkka Timonen, Thomas Tuch, Maik Merkel, Kay Weinhold, Stergios Vratolis, Jeni Vasilescu, Olivier Favez, Roy M. Harrison, Paolo Laj, Alfred Wiedensohler, Philip K. Hopke, Tuukka Petaja, Andres Alastuey, Xavier Querol
Summary: This study analyzed the variability and sources of equivalent black carbon (eBC) mass concentrations in urban Europe, emphasizing the need for harmonization of eBC measurements. The results showed a decreasing trend of eBC mass concentrations from traffic sites to urban background sites to suburban sites to regional background sites. There was also a clear decreasing trend in eBC concentrations from Southern to Northern Europe. Furthermore, the study revealed significant spatiotemporal heterogeneity in eBC concentrations and variable contributions of different pollution sources.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Marten in't Veld, Peeyush Khare, Yufang Hao, Cristina Reche, Noemi Perez, Andres Alastuey, Jesus Yus-Diez, Nicolas Marchand, Andre S. H. Prevot, Xavier Querol, Kaspar R. Daellenbach
Summary: This study found that organic aerosols (OA) are the dominant contributor to the oxidative potential of airborne particulate matter in northeastern Spain. The chemical composition of PM10 was analyzed at two sampling stations in Barcelona city and Montseny Natural Park, and it was found that Barcelona had significantly higher concentrations of water-soluble OA compared to Montseny due to the anthropogenic emissions in the city.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Dikaia E. Saraga, Xavier Querol, Regina M. B. O. Duarte, Noel J. Aquilina, Nuno Canha, Elena Gomez Alvarez, Milena Jovasevic-Stojanovic, Gabriel Beko, Steigvile Bycenkiene, Renata Kovacevic, Kristina Plauskaite, Nicola Carslaw
Summary: Source apportionment for indoor air pollution is challenging due to the complexity and variability of indoor sources, as well as the interconnectedness with the outdoor environment. This paper reviews the current understanding of source apportionment techniques, targeted pollutants, and identified sources, while highlighting limitations and knowledge gaps in this research field.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Cristina Gonzalez-Florez, Martina Klose, Andres Alastuey, Sylvain Dupont, Jeronimo Escribano, Vicken Etyemezian, Adolfo Gonzalez-Romero, Yue Huang, Konrad Kandler, George Nikolich, Agnesh Panta, Xavier Querol, Cristina Reche, Jesus Yus-Diez, Carlos Perez Garcia-Pando
Summary: The particle size distribution (PSD) of emitted mineral dust is dependent on factors such as friction velocity, wind direction, and event type. Dry deposition is identified as a potential cause for the variability in PSD. Dry deposition could represent a large proportion of the emission of both super-coarse particles and smaller particles. The differences in PSDs between regular events and haboob events may be due to differences in dust source fetch and resistance of soil aggregates to fragmentation.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Agnesh Panta, Konrad Kandler, Andres Alastuey, Cristina Gonzalez-Florez, Adolfo Gonzalez-Romero, Martina Klose, Xavier Querol, Cristina Reche, Jesus Yus-Diez, Carlos Perez Garcia-Pando
Summary: The chemical and morphological properties of mineral dust aerosols emitted by wind erosion from arid and semi-arid regions are crucial for understanding climate, ecosystems, air quality, and socio-economic sectors. In this study, we analyzed individual dust particles collected during a field campaign in the Moroccan Sahara to gain insights into their elemental composition and morphology. We identified eight major particle types and found that clay minerals and quartz were the dominant constituents. We also analyzed the mixing state and size distribution of iron-rich and feldspar particles, which are important for understanding the effects of dust on radiation and clouds.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Herve Petetin, Marc Guevara, Roger Garatachea, Franco Lopez, Kevin Oliveira, Santiago Enciso, Oriol Jorba, Xavier Querol, Jordi Massague, Andres Alastuey, Carlos Perez Garcia-Pando
Summary: Tropospheric ozone is a serious air pollutant that affects human health, vegetation, and climate in countries like Spain. A study conducted to support the Spanish O3 Mitigation Plan found that road transport and maritime traffic are the main contributors to ozone pollution. Although emission scenarios can reduce ozone concentrations, exceedances of air quality thresholds will still occur.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)