Article
Engineering, Environmental
Andrea R. Gerson, Rong Fan, Gujie Qian, Russell C. Schumann, Paul Olin, Daryl L. Howard, Roger St. C. Smart
Summary: The study revealed that the addition of organic manure can reduce the release of selenium leached from coal and waste rock, while the selenium release rate is not correlated with aqueous silicate.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Energy & Fuels
Hafidz Noor Fikri, Reinhard F. Sachsenhofer, Achim Bechtel, Doris Gross
Summary: Coal seams of different ages in the Barito Basin in Borneo were studied to compare their characteristics. The study revealed differences in peat types, flora, and climate between the Late Eocene and middle Miocene coals. The Miocene coals were significantly thicker and displayed a cyclic structure compared to the Eocene coals. The Miocene coals were dominated by more decay-resistant angiosperm trees and had a higher abundance of preserved plant tissues. Fungal activity was high in both Eocene and Miocene coals.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geology
Bo Jiu, Wenhui Huang, Nana Mu
Summary: This study investigated the characteristics and origins of lithium in enriched coal and coal seams in the southern margin of the Ordos Basin using various analytical techniques. The results showed that lithium mainly accumulates in clay minerals in the coal seams, and the contribution of volcanic ash to coal was supported by the presence of high-temperature minerals. The enrichment of lithium in the coal-measure strata is controlled by multiple factors.
ORE GEOLOGY REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Fei Xu, Shenjun Qin, Shenyong Li, Jinxi Wang, De'e Qi, Qingfeng Lu, Jingkai Xing
Summary: Critical metals are essential for global economy and emerging industries. The recovery of critical metals from alternative sources like coal ash has become a research hotspot. This study focuses on the enrichment, distribution, and occurrence mode of critical elements in coal combustion products. The results show that the majority of critical elements are enriched in fly ash, and some elements exceed their industrial utilization grades, indicating high recovery potential.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Peng Jiang, Cheng-rui Xie, Chun-lin Luo, Wei Meng, Gang Yang, Guang-suo Yu, Yan Gong, Mengxia Xu, Tao Wu
Summary: The migration and modes of occurrence of heavy metals in the opposed multi-burner coal-water-slurry gasification process were studied. Results showed that fine slags had higher concentrations of heavy metals compared to coarse slags. Chromium was enriched in coarse slags, while lead and zinc were mainly accumulated in fine slags. Majority of heavy metals in coals were associated with residual fractions, while in fine slags, except for zinc, the other heavy metals were mainly distributed in the residual fraction.
Article
Energy & Fuels
Jin Xie, Xiao-Dong Niu, Kai-Qiang He, Meng-Dan Shi, Su-Juan Yu, Chun-Gang Yuan, Jing-Fu Liu
Summary: This study investigated the distribution and speciation of arsenic and selenium in coal and burning byproducts in five coal-fired power plants in China. It was found that the concentrations of As and Se in fly ash and gypsum were significantly higher than in coal, indicating the need for proper disposal of coal-fired solid wastes.
Article
Environmental Sciences
Sneha Kumari, Toushali Roy, Saswati Chakladar, Alok Kumar, Md. Arif, Ashok Mohanty, Rajen Kundu, Sanchita Chakravarty
Summary: This study examines the distribution and concentration of REEs and major elements in coal samples from the Samaleswari coal block in Odisha, India. The coal ash samples were found to be rich in SiO2 and had lower proportions of Al2O3, Fe2O3, and TiO2. The average concentration of REEs in the four boreholes was 510 ppm, with the distribution pattern being Ce > La > Nd > Y > Pr > Sc > Sm > Gd > Dy > Er > Yb > Eu > Ho > Tb > Tm > Lu. The study concludes that the coal seams in this region are a promising source of REEs.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Energy & Fuels
Fei Hu, Qingtao Meng, Zhaojun Liu
Summary: This study investigates the characteristics and formation mechanism of symbiotic coal and oil shale by conducting various tests on samples. High-quality oil shale primarily comes from bacteria and algae, while low-quality oil shale mainly originates from algae and terrestrial vitrinite. These findings contribute to the improvement of the symbiotic metallogenic theory of coal and oil shale, as well as the exploration and development of coal and oil shale in the Huangxian Basin and similar basins.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Chemistry, Applied
Bo Yang, Chen Cheng, Yuanxin Li, Wei Cheng, Jingkun Zang, Xiangping Lai, Xiaorui Wang
Summary: Rare earth elements (REY) have been found to have high content in coal, mainly existing in kaolinite, possibly in the form of adsorption. The study provides scientific references for potential extraction of associated REY in coal.
JOURNAL OF RARE EARTHS
(2022)
Article
Energy & Fuels
Victor M. Sepulveda-Castaneda, Joan S. Esterle, Suzanne D. Golding, Sebastian Gonzalez
Summary: Coal bed methane (CBM) production in the Cesar Sub-basin of Colombia has been studied to determine the origin of the gas, with a focus on whether it is thermogenic, biogenic, or a mixture of both. Analyzing water and gas samples from CBM production wells and aquifers showed that biogenesis is the main gas origin, with structural compartmentalization influencing gas content and coal ranks. Isotopic and geochemical analysis supported the presence of biogenic gas and confirmed the occurrence of methanogenesis in the study area.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
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
Energy & Fuels
Gang Wang, Yong Qin, Yiwei Xie
Summary: This study sampled and tested coal from the Xishan coalfield in China, analyzing its characteristics and enrichment environment, providing a foundation for the efficient utilization and identification of coal resources.
Article
Geosciences, Multidisciplinary
Jincheng Ye, Yafei Zhang, Wei He, Rui Tao, Shu Tao, Shida Chen, Yi Cui, Qi Wang
Summary: This study conducted experiments on geochemical elements and reservoir physical properties of Jurassic Yan'an Formation coal samples from the Ningdong coalfield. The coal-forming environment was distinguished and the relationship between geochemical element distribution and coal pore structure was analyzed. The results showed that the coal samples had low moisture, low ash, medium volatile matter, and high fixed carbon content. The major elements and trace elements were similar to other Chinese coals, while others were deficient. The rare earth elements had similar contents and distribution patterns, with light rare earth elements relatively enriched. The coal samples had a porosity dominated by adsorption pores, with the pore morphology dominated by parallel plate and ink bottle pores. The coal formation occurred in a medium-level peat swamp with relative oxidizing conditions, influenced by terrestrial sources. The distribution of elements indirectly affected the coal pore characteristics by changing the provenance and sedimentary environment. An increase in terrigenous input decreased the porosity and increased the specific surface area and total pore volume, while an increase in seawater input increased the porosity and decreased the specific surface area and total pore volume. The sedimentary environment changed the provenance and indirectly affected the coal pore structure.
NATURAL RESOURCES RESEARCH
(2023)
Article
Engineering, Environmental
Fengyan Li, Tao Yu, Zhenzhong Huang, Zhongfang Yang, Qingye Hou, Qifeng Tang, Jiuchen Liu, Lingxiao Wang
Summary: This study quantitatively assesses the relationship between human health and geological factors using a new framework. The results show that the atmospheric and water resource indicators in the study area were generally favorable, while geological landforms varied based on topography. The study also found that the selenium content in the soil greatly exceeded the local background value. Our research underscores the importance of geological factors on human health, establishes a new health-geological assessment model, and provides a scientific foundation for local spatial planning, water resource development, and land resource management. However, the framework and indicators for health geology may need to be adjusted due to varying geological conditions worldwide.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Engineering, Environmental
Colin A. Cooke, Paul E. Drevnick
Summary: Mountaintop removal coal mining has negative impacts on downstream ecosystems by delivering nutrients, ions, and heavy metals. This study shows that it also affects ecosystems downwind and releases polycyclic aromatic compounds (PACs).
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)