Fine chemical speciation and environmental impact capacity of trace elements with different enrichment levels in coal

Liu, Yuan; Wei, Yong; Liu, Guijian; Fu, Bojie; Chen, Bingyu; Zhang, Jiamei; Gui, Lin; Zhou, Huihui; Lu, Muyuan

doi:10.1016/j.scitotenv.2022.158928

Cited by 7 publications

(5 citation statements)

References 52 publications

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“…The most stable landscapes of river valleys from the point of view of risk development can be intensively used. And those exposed to degradation risks should be included in the territories of special protection and compliance with the non-interference regime [1][2][3][4][5][6][7][8][9][10].…”

Section: Methodsmentioning

confidence: 99%

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Geoecological risks in the valleys of small rivers of the forest-steppe zone of the Russian plain (on the example of the Chuvash Republic)

Nikonorova,

Ilyin,

Ilyina

et al. 2023

E3S Web Conf.

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The Chuvash Republic belongs to the territories with a high frequency of occurrence of emergency situations of moderate severity. This is due to the intensive economic development of the region. The probability and intensity of the manifestation of georisks is different for individual landscapes, therefore it needs a detailed study. The study includes the study of the probability of the development of slope, climatic, hydrological risks, and the risk of wildfires on the territory of the Chuvash Republic. The analysis showed that the slope type of geoecological risk is confined to the river valleys of the region and has maximum values in the north of the Chuvash Republic. A high risk of flooding and flooding exists in the valleys of major rivers of the region (Volga, Sura) and their tributaries of the first order. On other watercourses, the hydrological risk is not significant. Climate and weather risks are associated with hurricane winds and dry winds. The southeastern part of the region suffers the most from them. The risk of fires depends on the composition and age of the stand. The maximum risk values are typical for the Prisursky forest area (southern and southwestern parts of the region). Based on the data obtained, the classification of the districts of the Chuvash Republic by the size of the georisks was carried out. Four groups of districts were identified according to the probability of natural emergencies and the main factors of their occurrence were described.

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Section: Methodsmentioning

confidence: 99%

“…Therefore, a unique combination of diverse landscapes is presented on a small territory of the region. The combination of various landscape zones on a small territory provides high natural stability of geosystems [9]. However, the influence of anthropogenic factors can lead to deterioration of landscapes.…”

Section: Methodsmentioning

confidence: 99%

Geoecological risks in the valleys of small rivers of the forest-steppe zone of the Russian plain (on the example of the Chuvash Republic)

Nikonorova,

Ilyin,

Ilyina

et al. 2023

E3S Web Conf.

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“…As a product of the death and accumulation of paleoplants and the special organic sedimentary rock, coal is an important carrier of paleoecological and paleoenvironmental information in geological history, containing records of the paleoclimate and paleoenvironment information during the peat deposition period (Shao et al, 2017). Several paleoenvironmental studies have conducted by geochemical analyses of the elemental contents (Wu et al, 2013;Williams et al, 2012;Lu et al, 2017;Wang et al, 2022;Liu et al, 2023). However, the dispersion and enrichment of elements are affected by many factors and have multiple interpretations (Dai et al, 2014;Oboirienet al, 2016;Fu et al, 2016;Ling et al, 2019;Liu et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…Several paleoenvironmental studies have conducted by geochemical analyses of the elemental contents (Wu et al, 2013;Williams et al, 2012;Lu et al, 2017;Wang et al, 2022;Liu et al, 2023). However, the dispersion and enrichment of elements are affected by many factors and have multiple interpretations (Dai et al, 2014;Oboirienet al, 2016;Fu et al, 2016;Ling et al, 2019;Liu et al, 2023). The paleoenvironment of the coal-forming period can be reconstructed by coal facies, mineral composition, and element geochemistry, but it is more informative to consider the influence of the sedimentary microenvironment on trace element migration and transformation during the coal formation process.…”

Section: Introductionmentioning

confidence: 99%

The Coal-Forming Environment at the End of the Late Permian and Its Control on Trace Elements: A Case Study of the C3 Coal Seam of the Xuanwei Formation in Eastern Yunnan, China

Wang,

Shao,

Wang

2023

Preprint

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Paleopeat-forming environments have an important effect on the dispersion and enrichment of trace elements in coal. The C3 coal seam of the Xuanwei Formation in eastern Yunnan was used as a case study to reconstruct the paleopeat-forming environment based on the coal facies parameters and geochemical characteristics, and its influence on trace element (including rare earth elements and yttrium, REY) enrichment was investigated. The C3 coal was classified as medium rank coking coal with an ultra-low moisture content, medium-high-ash yield, and low-medium volatile content. Compared to the average values for Chinese coals, Cu and V were enriched and Co was slightly enriched in the C3 coal. Compared with the average values for world coals, Cu and V were enriched, while several other trace elements were slightly enriched, including Co, Hf, Nb, Sc, Ta, Zn, and Zr in the C3 coal. The C3 coal was deposited in a low peat mainly limno-telmatic swamp, with deep water, weak hydrodynamic conditions, brackish to salty water, and reducing conditions. Trace elements, including Cu, V, Hf, Nb, Sc, Ta, Zr, and REY, are typically enriched in a limno-telmatic environment with fresh water, and reducing and weak hydrodynamic conditions. Additionally, REY and V are also significantly enriched in brackish water limno-telmatic conditions with the same depositional environment.

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“…The primary pattern of Chinese coal utilization is combustion for electricity generation, while coal pyrolysis plays a vital role in coal's efficient and clean utilization [3,4]. However, coal utilization will cause all sorts of pollution, e.g., noxious gas, suspended particles, and trace elements [5][6][7][8], which may affect human health and result in severe disease [9,10]. Many inorganic matrices can be identified in coal and may significantly affect coal utilization [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Mineralogical Characteristics and Arsenic Release of High Arsenic Coals from Southwestern Guizhou, China during Pyrolysis Process

et al. 2023

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Coal is the primary energy source in China, and coal pyrolysis is considered an essential and efficient method for clean coal utilization. Three high arsenic coals collected from the southwestern Guizhou province of China were chosen in this study. Low-temperature ashing plus X-ray diffraction analysis (XRD) was used to identify the minerals in coals. The three coals were pyrolyzed in a tube furnace in an N2 atmosphere at 950 °C, 1200 °C, and 1400 °C, respectively. Environment scanning electron microscope (ESEM), XRD, X-ray fluorescence analysis (XRF), and inductively coupled plasma-mass spectrometry (ICP-MS) were adopted to determine the morphology, mineral compositions, and element compositions and arsenic contents of the coal pyrolysis ashes, respectively. It can be found that minerals in coal are mainly composed of quartz, pyrite, muscovite, and rutile. The minerals in the ashes generated from coal pyrolysis mainly contain quartz, dehydroxylated muscovite, iron oxide minerals, mullite, and silicon nitride. Oldhamite and gupeite exist at 950 °C and 1400 °C, respectively. The morphologies of oldhamite and gupeite at these temperatures are irregular block-shaped particles and irregular spherical particles, respectively. The mineralogical transformations in the process of coal pyrolysis affect coal utilization. The arsenic release rate is higher than 87% during pyrolysis at 1400 °C. The arsenic in organic matter is more able to be volatilized than mineral components. The retention time can slightly influence the arsenic release rate, and the influence of temperature is much more significant than the influence of retention time. The understanding of mineral evolution and arsenic environmental emission is helpful for the safety of high-arsenic coal pyrolysis.

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Fine chemical speciation and environmental impact capacity of trace elements with different enrichment levels in coal

Cited by 7 publications

References 52 publications

Geoecological risks in the valleys of small rivers of the forest-steppe zone of the Russian plain (on the example of the Chuvash Republic)

Geoecological risks in the valleys of small rivers of the forest-steppe zone of the Russian plain (on the example of the Chuvash Republic)

The Coal-Forming Environment at the End of the Late Permian and Its Control on Trace Elements: A Case Study of the C3 Coal Seam of the Xuanwei Formation in Eastern Yunnan, China

Mineralogical Characteristics and Arsenic Release of High Arsenic Coals from Southwestern Guizhou, China during Pyrolysis Process

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