Article
Geography, Physical
Marek Widera, Achim Bechtel, Lilianna Chomiak, Piotr Maciaszek, Barbara Slodkowska, Robert Wachocki, Elzbieta Worobiec, Grzegorz Worobiec, Tomasz Zielinski
Summary: Our study reconstructs the paleoenvironmental conditions during the formation of the first Mid-Polish Lignite Seam (MPLS-1) in central Poland, indicating warm temperate and humid climate with plant communities similar to modern coastal forests. The palynological assemblages reflect cycles of palaeofloristic composition, demonstrating variations in swamp forests dominated by Taxodium/Glyptostrobus-Nyssa. The geochemical analyses suggest angiosperms dominated the peat-forming vegetation, while discrepancies between palynologically- and geochemically-derived temperatures can be attributed to changes in vegetation.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Environmental Sciences
Yuan Li, Li Ji, Wujuan Mi, Shulian Xie, Yonghong Bi
Summary: Based on a ten-year investigation using Kriging interpolation, it was found that the groundwater arsenic concentrations in Shanxi Province were decreasing over time, with high-risk areas mainly concentrated in the northern and middle basin regions. The forecasted high-risk areas in coal mining regions were larger than those in non-coal mining areas, indicating greater vulnerability of residents living around coal mining areas to groundwater arsenic exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Yabing Lin, Yong Qin, Junwei Qiao, Geng Li, Hui Zhang
Summary: This study investigates the pore structure characteristics of vitrain and durain in high-volatile bituminous coals. The results show that the pore characteristics of different coal lithotypes are clearly different at different pore size scales. The content of inertinite and vitrinite affects the pore structure. Physical compaction mainly affects the seepage pore structure.
Article
Energy & Fuels
Sandra Rodrigues, Lionel Fonteneau, Joan Esterle
Summary: Commercially available hyperspectral drill core scanning systems were used to characterise coal samples of varying rank with different preparations. The observed spectral features of the coals changed with increasing coalification. The ratio of the area of the aromatic absorption feature to that of the aliphatic absorption features, called Rank Spectral Index, displayed a strong linear correlation with coal rank parameters.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Engineering, Environmental
Brendon Costello, Deli Chen, Bing Han, Wei Zhang, Clayton R. Butterly
Summary: This study found that the addition of lignite can effectively reduce nitrogen loss from broiler litter and decrease ammonia emissions, helping to increase the nutrient value of waste.
Article
Energy & Fuels
Yakup Celik, Ali Ihsan Karayigit, Riza Gorkem Oskay, Mine Sezgul Kayseri-Ozer, Kimon Christanis, James C. Hower, Xavier Querol
Summary: The Harmancık Basin in western Anatolia hosts a 12.6-m-thick coal seam that is being exploited by open-cast mining methods. The coal seam formation went through vegetation and depositional changes during the middle Miocene, leading to vertical variations in elemental and mineralogical compositions. The presence of clinoptilolite/heulandite-type zeolite and carbonaceous clayey diatomite in the coal seam suggests alteration of synchronous volcanic inputs under different environmental conditions.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Fudong Xin, Hao Xu, Dazhen Tang, Can Cao
Summary: This study investigates the reservoir properties and gas-bearing characteristics of different lithotypes of lignite and explores the occurrence and storage potential of methane in lignite. The results show that the maceral composition of lignite affects its reservoir characteristics and hydrophilicity, which control the gas-water competition in the reservoir. Xylite lignite has the highest occurrence potential for adsorbed gas and soluble gas, while fusain-rich lignite has the highest free gas storage potential. The occurrence states and accumulation patterns of methane vary among different lithotypes of lignite. Understanding methane's occurrence and storage potential in different lithotypes of lignite is important for evaluating methane resources and exploring methane enrichment models.
NATURAL RESOURCES RESEARCH
(2023)
Article
Engineering, Environmental
Lingen Zhang, Qingming Song, Zhenming Xu
Summary: This study proposed an effective vacuum distillation method to remove arsenic and recover germanium and tungsten from coal fly ash (CFA). Experimental results showed a remarkable removal ratio of 96% for arsenic at a temperature of 550 degrees C. The research encourages further exploration of vacuum separation technology for environmentally friendly recycling of CFA.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Jiangbo Ren, Xuexiao Jiang, Gaowen He, Fenlian Wang, Tianbang Yang, Shuaijie Luo, Yinan Deng, Jianhou Zhou, Xiguang Deng, Huiqiang Yao, Hongxia Yu
Summary: Research on REY-rich deep-sea sediments has revealed that the enrichment of REY is closely related to phosphate components, contradicting the low REY content in marine phosphorites. The phosphate components in deep-sea sediments have much higher RREY and RREY/P2O5 values compared to marine phosphorites. The REY-rich phosphates inherit the primary REY pattern of seawater and become the major REY budget on the seabed. The non-phosphate components exhibit strong terrigenous attributes, indicating a low sedimentation rate in the study area.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geology
Saiyu Li, Yu Fu, Dengfeng Li, Fei Huang, Xiaoming Sun, Gaowen He
Summary: Recent studies have shown that the coexistence of abundant phillipsite and REY enrichment in deep-sea sediments is generally explained by the low sedimentation rate. However, the capacity of phillipsite to enrich REY and the reason for its low REY content still remain unclear. This study examined phillipsite in pelagic REY-rich sediments and ferromanganese nodules from the Western Pacific Marcus-Wake seamount chain and found that sediment-hosted phillipsite has a homogeneous parent rock and similar alteration degree, while nodule-hosted phillipsite may have an inhomogeneous parent rock and varying alteration degree.
ORE GEOLOGY REVIEWS
(2023)
Article
Environmental Sciences
Wei Zhang, Clayton Butterly, Bing Han, Ji-Zheng He, Deli Chen
Summary: This study found that modified lignite and BC significantly reduce NH3 volatilization from manure by adsorbing and biologically immobilizing ammoniacal N. Additionally, the NH4+-N concentration in amended manure was significantly higher, indicating a positive impact on manure quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Jianrong Xue, Dongping Long, Hong Zhong, Shuai Wang, Lihua Liu
Summary: The novel technology proposed in this study can effectively recover arsenic and antimony from arsenic-rich copper smelter dust, with recovery rates of over 97.5% for both elements through leaching and reduction steps.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Victor P. Nechaev, Shifeng Dai, Igor Yu Chekryzhov, Irina A. Tarasenko, Alexander Zin'kov, Tim A. Moore
Summary: Miocene coal beds in the Siniy Utyes Basin, South Primirye, in eastern Russia, contain elevated concentrations of rare earth elements and other trace elements. These elements are sourced from weathered granites rather than volcanic ash layers. The presence of certain minerals in both the coal and volcanic ash suggests a post-depositional emplacement of these elements. The enrichment of elements in the coal proximal to the volcanic ash layers may be attributed to higher permeability and a geochemical barrier at the coal/volcanic ash interface.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Environmental Sciences
Norapat Pratinthong, Siwat Sangchan, Yothin Chimupala, Pimluck Kijjanapanich
Summary: The study investigated the optimum conditions for sulfate removal from lignite coal mine drainage in Thailand using ettringite precipitation. Results showed that the Al/S ratio and reaction time significantly affected sulfate removal efficiency, while the Ca/S ratio had no significant impact. Under the optimal conditions, high sulfate removal efficiencies were achieved in both Lamphun and Lampang mine drainage, demonstrating the effectiveness of ettringite precipitation in sulfate removal.
Article
Energy & Fuels
Muxin Liu, Zhiping Lei, Lijuan Gao, Jingchong Yan, Hengfu Shui, Zhicai Wang, Zhigang Xu, Lei Ren
Summary: This study performed de-polymerization of Shengli lignite (SL) to remove minerals, and the resultant product was subjected to hydro-liquefaction to prepare value-added aromatic products. Compared with raw lignite, the resultant product is easily converted to light products with low H2 consumption due to its small molecular weight. Efficient conversion of the resultant product into aromatic fractions requires appropriate temperatures and the presence of a Ni-Mo-S/Al2O3 catalyst.
Article
Environmental Sciences
Patricia Cordoba, Carlos Ayora, Xavier Querol
Summary: A novel chemical stabilization method was found to effectively immobilize Mo and Ni in petroleum coke fly ash, reducing their concentrations to levels compliant with established standards. The application of this method can effectively reduce pollution in nations heavily reliant on coal/petroleum coke.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
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
Yakup Celik, Ali Ihsan Karayigit, Riza Gorkem Oskay, Mine Sezgul Kayseri-Ozer, Kimon Christanis, James C. Hower, Xavier Querol
Summary: The Harmancık Basin in western Anatolia hosts a 12.6-m-thick coal seam that is being exploited by open-cast mining methods. The coal seam formation went through vegetation and depositional changes during the middle Miocene, leading to vertical variations in elemental and mineralogical compositions. The presence of clinoptilolite/heulandite-type zeolite and carbonaceous clayey diatomite in the coal seam suggests alteration of synchronous volcanic inputs under different environmental conditions.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Energy & Fuels
Patricia Cordoba, Baoqing Li, Jing Li, Yunfei Shangguan, Pedro Trechera, Xinguo Zhuang, Xavier Querol
Summary: The behavior and speciation of inorganic trace pollutants were studied in a coal-fired power station equipped with various control devices, with a focus on ammonia flue gas desulphurisation (NH3-FGD) efficiency regarding major and trace pollutants retention. Issues such as entrainment of droplets and particles, diminishing diffusivity, and low FGD efficiencies were identified in the study.
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
Public, Environmental & Occupational Health
M. Viana, A. Salmatonidis, S. Bezantakos, C. Ribalta, N. Moreno, P. Cordoba, F. R. Cassee, J. Boere, S. Fraga, J. P. Teixeira, M. J. Bessa, E. Monfort
Summary: This study evaluated the performance of an aerosol concentrator in sampling UFPs in high concentration industrial settings, showing comparability to online monitors in terms of particle mass and composition. Results indicated that spraying temperature drove metal fractionation between UF and fine particles. It is suggested that personal exposure and risk assessments in occupational settings should include dedicated metrics for monitoring UFPs.
ANNALS OF WORK EXPOSURES AND HEALTH
(2021)
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
Environmental Sciences
Pedro Trechera, Teresa Moreno, Patricia Cordoba, Natalia Moreno, Fulvio Amato, Joaquim Cortes, Xinguo Zhuang, Baoqing Li, Jing Li, Yunfei Shangguan, Ana Oliete Dominguez, Frank Kelly, Takoua Mhadhbi, Jean Luc Jaffrezo, Gaelle Uzu, Xavier Querol
Summary: This study evaluates the geochemical and oxidative potential properties of respirable fractions of powdered coal samples from Chinese coal mines. Specific inorganic components were found to have a clear link with oxidative potential, while organic matter and certain minerals also regulate the correlations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Ali Ihsan Karayigit, Nevin Azeri, Riza Gorkem Oskay, James C. Hower
Summary: This study investigated the mineralogical and elemental compositions of three sampling profiles from different sectors of the Cayırhan coalfield. The most significant difference between the Tv and Tb splits was found to be in the mineralogical composition. The presence of zeolite minerals and carbonate minerals in the Tv and Tb splits of the BA and BB profiles suggests favorable alkaline conditions for natural zeolite formation. In contrast, the presence of zeolite minerals and authigenic K-feldspar grains in the BC profile implies a semi-open hydrogeological system for transferring necessary ions for zeolite formation.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geology
Xuanphu Nguyen, Jing Li, Xinguo Zhuang, Baoqing Li, Xavier Querol, Natalia Moreno, Patricia Cordoba
Summary: The study focuses on the mineralogical and geochemical characteristics of Late Triassic coals from the Coc Sau open-pit mine in the Cam Pha Coalfield, Quang Ninh Province, Northeastern Vietnam. The coals are characterized by medium ash yield, low sulfur content, and low moisture content, indicating a semianthracite rank. The coals are enriched in Rb and Cs, which may originate from potassium rich clay minerals and weathered felsic terrigenous detritus.
ORE GEOLOGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Patricia Cordoba, Baoqing Li, Jing Li, Xinguo Zhuang, Xavier Querol
Summary: This paper reports on the chemical speciation and leaching behavior of hazardous trace pollutants in lignite and lignite-petcoke blend co-combustion products from three power stations in China. The results show that oxidizable elements, mainly As and Mo, are mainly present in easily water-soluble forms or slightly acidic states in the ashes, and the use of petroleum coke as co-fuel affects the ash composition and leaching behavior of some inorganic trace pollutants.
Article
Energy & Fuels
Jing Li, Yuan Wang, Xuanphu Nguyen, Xinguo Zhuang, Jiancheng Li, Xavier Querol, Baoqing Li, Natalia Moreno, Vanlong Hoang, Patricia Cordoba, Vanthuat Do
Summary: This study presents the first integrated research on the mineralogical, geochemical, and stable isotope characteristics of high-sulfur coals from the Khanh Hoa open-pit mine in the Thai Nguyen Coalfield of NE Vietnam. The coal formation is attributed to marine influences and is characterized by medium ash yield, low volatile matter yield, and high sulfur content. The mineralogical, geochemical, and isotopic characteristics suggest that the high-sulfur Khanh Hoa coal was formed/preserved in a marine-influenced anoxic environment.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
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
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.