Shangguan Y. F. auteur aut IRD Zhuang X. G. auteur aut IRD Querol X. auteur aut IRD Li B. Q. auteur aut IRD Moreno N. auteur aut IRD Trechera P. auteur aut IRD Sola P. C. auteur aut IRD Uzu Gaëlle auteur aut IRD Li J. auteur aut IRD text journalArticle eng text/pdf born digital access Oxidative potential (OP) is considered to be an efficient indicator of particulate matter (PM) to induce oxidative stress in the lungs and is increasingly considered to be a relevant health metric. In this study, two complementary OP assays were deployed, including dithiothreitol (DTT) and ascorbic acid (AA) assays, to investigate the po-tential toxicity (as generators of oxidative stress) of respirable fractions (DD4, < 4 mu m) of deposited dust (DD500, < 500 mu m) in underground low-S and low-pyrite coal mines in Henan Province, Central China. The OPDTT of DD4 is higher than that reported for other types of atmospheric PM, whereas the OPAA of DD4 is similar and/or slightly higher. Cross-correlation and multilinear regression analyses are applied using datasets of major mineral and geochemical patterns in the DD4 samples and the respective OP values to identify the major drivers for OP in respirable coal dust. Thereafter, the patterns of DD4 are compared with those of DD500 and the parent coals to determine the sources of OP-relevant substances. OP(DTT )is mainly governed by some trace elements (Sb, As, Li, B, Sr, and Pb) and minor minerals (anatase, quartz, siderite), and their synergistic effect may be one of the reasons for the high DTT consumption. For OPAA, quartz, total clay (sum of illite, kaolinite, tobelite, and clinochlore) and Ni, Cr, Co, Si, and S, play an important role in regulating the OPAA of pyrite-free DD4 samples. These OP-relevant substances have three sources: coal dust, which has a similar composition in DD4, DD500, and the parent coal (such as siderite and its associated elements); gangue dust, which does not occur in the parent coal but is widely detected in DD4 and DD500 (such as quartz, kaolinite, and relevant elements); and cement dust (from gunite galleries), which is mainly calcite-and calcite-associated elements. specialized Respirable dust Mineralogy Geochemistry Oxidative potential Source apportionment CHINE HENAN PROVINCE 021 064 050 258 104017 [16 p.] 2022 0166-5162 https://www.documentation.ird.fr/hor/fdi:010085225 10.1016/j.coal.2022.104017 0166-5162 [F B010085225] https://www.documentation.ird.fr/hor/fdi:010085225 https://www.documentation.ird.fr/intranet/publi/2022-07/010085225.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2022-07-01 2022-07-01 fdi:010085225 fre