Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals
This study evaluates geochemical and oxidative potential (OP) properties of the respirable (finer than 4 μm) fractions of 22 powdered coal samples from channel profiles (CP4) in Chinese mined coals. The CP4 fractions extracted from milled samples of 22 different coals were mineralogically and geochemically analysed and the relationships with the OP evaluated. The evaluation between CP4/CP demonstrated that CP4 increased concentrations of anatase, Cs, W, Zn and Zr, whereas sulphates, Fe, S, Mo, Mn, Hf and Ge decreased their CP4 concentrations. OP results from ascorbic acid (AA), glutathione (GSH) and dithiothreitol (DTT) tests evidenced a clear link between specific inorganic components of CP4 with OPAA and the organic fraction of OPGSH and OPDTT. Correlation analyses were performed for OP indicators and the geochemical patterns of CP4. These were compared with respirable dust samples from prior studies. They indicate that Fe (r = 0.83), pyrite (r = 0.66) and sulphate minerals (r = 0.42) (tracing acidic species from pyrite oxidation), followed by S (r = 0.50) and ash yield (r = 0.46), and, to a much lesser extent, Ti, anatase, U, Mo, V and Pb, are clearly linked with OPAA. Moreover, OPGSH correlation was identified by organic matter, as moisture (r = 0.73), Na (r = 0.56) and B (r = 0.51), and to a lesser extent by the coarse particle size, Ca and carbonate minerals. In addition, Mg (r = 0.70), B (r = 0.47), Na (r = 0.59), Mn, Ba, quartz, particle size and Sr regulate OPDTT correlations. These became more noticeable when the analysis was done for samples of the same type of coal rank, in this case, bituminous.
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Elsevier
2021-12-15
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Subjects: | Chinese coal, Coal dust, Respirable dust, Oxidative potential, Coal geochemistry, |
Online Access: | http://hdl.handle.net/10261/250114 http://dx.doi.org/10.13039/501100004837 |
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dig-idaea-es-10261-2501142023-01-02T10:05:45Z Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals Trechera, Pedro Moreno, Teresa Córdoba, Patricia Moreno, Natalia Amato, Fulvio Cortés, Joaquim Zhuang, Xinguo Li, Baoqing Li, Jing Shangguan, Yunfei Oliete Dominguez, Ana Kelly, Frank Mhadhbi, Takoua Jaffrezo, Jean Luc Uzu, Gaello Querol, Xavier Ministerio de Ciencia e Innovación (España) Moreno, Teresa [0000-0003-3235-1027] Amato, Fulvio [0000-0003-1546-9154] Querol, Xavier [0000-0002-6549-9899] Chinese coal Coal dust Respirable dust Oxidative potential Coal geochemistry This study evaluates geochemical and oxidative potential (OP) properties of the respirable (finer than 4 μm) fractions of 22 powdered coal samples from channel profiles (CP4) in Chinese mined coals. The CP4 fractions extracted from milled samples of 22 different coals were mineralogically and geochemically analysed and the relationships with the OP evaluated. The evaluation between CP4/CP demonstrated that CP4 increased concentrations of anatase, Cs, W, Zn and Zr, whereas sulphates, Fe, S, Mo, Mn, Hf and Ge decreased their CP4 concentrations. OP results from ascorbic acid (AA), glutathione (GSH) and dithiothreitol (DTT) tests evidenced a clear link between specific inorganic components of CP4 with OPAA and the organic fraction of OPGSH and OPDTT. Correlation analyses were performed for OP indicators and the geochemical patterns of CP4. These were compared with respirable dust samples from prior studies. They indicate that Fe (r = 0.83), pyrite (r = 0.66) and sulphate minerals (r = 0.42) (tracing acidic species from pyrite oxidation), followed by S (r = 0.50) and ash yield (r = 0.46), and, to a much lesser extent, Ti, anatase, U, Mo, V and Pb, are clearly linked with OPAA. Moreover, OPGSH correlation was identified by organic matter, as moisture (r = 0.73), Na (r = 0.56) and B (r = 0.51), and to a lesser extent by the coarse particle size, Ca and carbonate minerals. In addition, Mg (r = 0.70), B (r = 0.47), Na (r = 0.59), Mn, Ba, quartz, particle size and Sr regulate OPDTT correlations. These became more noticeable when the analysis was done for samples of the same type of coal rank, in this case, bituminous. This study was supported by Generalitat de Catalunya (AGAUR 2017 SGR41), Spain; by the National Science Foundation of China (grant 41972180); the Program of Introducing Talents of Discipline to Universities (grant B14031) and Overseas Top Scholars Program for the Recruitment of Global Experts, China; and by the Spanish Ministry of Science and Innovation (Excelencia Severo Ochoa, Project CEX2018-000794-S). Malvern Mastersizer Scirocco 2000 extension measurements were performed at the ICTS NANBIOSIS by the Nanostructured Liquids Unit (U12) of the CIBER in Bioengineering, Biomaterials & Nanomedicine (CIBER-BBN), located at the IQAC-CSIC (Barcelona, Spain). Pedro Trechera is contracted by the ROCD (Reducing risks from Occupational exposure to Coal Dust) project supported by the European Commission Research Fund for Coal and Steel; Grant Agreement Number 754205. Peer reviewed 2021-09-14T08:04:53Z 2021-09-14T08:04:53Z 2021-12-15 artículo http://purl.org/coar/resource_type/c_6501 Science of The Total Environment 800: 149486 (2021) http://hdl.handle.net/10261/250114 10.1016/j.scitotenv.2021.149486 http://dx.doi.org/10.13039/501100004837 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CEX2018-000794-S Publisher's version https://doi.org/10.1016/j.scitotenv.2021.149486 Sí open Elsevier |
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Chinese coal Coal dust Respirable dust Oxidative potential Coal geochemistry Chinese coal Coal dust Respirable dust Oxidative potential Coal geochemistry |
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Chinese coal Coal dust Respirable dust Oxidative potential Coal geochemistry Chinese coal Coal dust Respirable dust Oxidative potential Coal geochemistry Trechera, Pedro Moreno, Teresa Córdoba, Patricia Moreno, Natalia Amato, Fulvio Cortés, Joaquim Zhuang, Xinguo Li, Baoqing Li, Jing Shangguan, Yunfei Oliete Dominguez, Ana Kelly, Frank Mhadhbi, Takoua Jaffrezo, Jean Luc Uzu, Gaello Querol, Xavier Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals |
description |
This study evaluates geochemical and oxidative potential (OP) properties of the respirable (finer than 4 μm) fractions of 22 powdered coal samples from channel profiles (CP4) in Chinese mined coals. The CP4 fractions extracted from milled samples of 22 different coals were mineralogically and geochemically analysed and the relationships with the OP evaluated. The evaluation between CP4/CP demonstrated that CP4 increased concentrations of anatase, Cs, W, Zn and Zr, whereas sulphates, Fe, S, Mo, Mn, Hf and Ge decreased their CP4 concentrations. OP results from ascorbic acid (AA), glutathione (GSH) and dithiothreitol (DTT) tests evidenced a clear link between specific inorganic components of CP4 with OPAA and the organic fraction of OPGSH and OPDTT. Correlation analyses were performed for OP indicators and the geochemical patterns of CP4. These were compared with respirable dust samples from prior studies. They indicate that Fe (r = 0.83), pyrite (r = 0.66) and sulphate minerals (r = 0.42) (tracing acidic species from pyrite oxidation), followed by S (r = 0.50) and ash yield (r = 0.46), and, to a much lesser extent, Ti, anatase, U, Mo, V and Pb, are clearly linked with OPAA. Moreover, OPGSH correlation was identified by organic matter, as moisture (r = 0.73), Na (r = 0.56) and B (r = 0.51), and to a lesser extent by the coarse particle size, Ca and carbonate minerals. In addition, Mg (r = 0.70), B (r = 0.47), Na (r = 0.59), Mn, Ba, quartz, particle size and Sr regulate OPDTT correlations. These became more noticeable when the analysis was done for samples of the same type of coal rank, in this case, bituminous. |
author2 |
Ministerio de Ciencia e Innovación (España) |
author_facet |
Ministerio de Ciencia e Innovación (España) Trechera, Pedro Moreno, Teresa Córdoba, Patricia Moreno, Natalia Amato, Fulvio Cortés, Joaquim Zhuang, Xinguo Li, Baoqing Li, Jing Shangguan, Yunfei Oliete Dominguez, Ana Kelly, Frank Mhadhbi, Takoua Jaffrezo, Jean Luc Uzu, Gaello Querol, Xavier |
format |
artículo |
topic_facet |
Chinese coal Coal dust Respirable dust Oxidative potential Coal geochemistry |
author |
Trechera, Pedro Moreno, Teresa Córdoba, Patricia Moreno, Natalia Amato, Fulvio Cortés, Joaquim Zhuang, Xinguo Li, Baoqing Li, Jing Shangguan, Yunfei Oliete Dominguez, Ana Kelly, Frank Mhadhbi, Takoua Jaffrezo, Jean Luc Uzu, Gaello Querol, Xavier |
author_sort |
Trechera, Pedro |
title |
Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals |
title_short |
Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals |
title_full |
Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals |
title_fullStr |
Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals |
title_full_unstemmed |
Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals |
title_sort |
geochemistry and oxidative potential of the respirable fraction of powdered mined chinese coals |
publisher |
Elsevier |
publishDate |
2021-12-15 |
url |
http://hdl.handle.net/10261/250114 http://dx.doi.org/10.13039/501100004837 |
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