Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals

Trechera, Pedro; Moreno, Teresa; Córdoba, Patricia; Moreno, Natàlia; Amato, Fúlvio; Cortés, Joaquim; Zhuang, Xinguo; Li, Baoqing; Li, Jing; Shangguan, Yunfei; Dominguez, Ana Oliete; Kelly, Frank J.; Mhadhbi, Takoua; Jaffrezo, Jeań Luc; Uzu, Gaëlle; Querol, Xavier

doi:10.1016/j.scitotenv.2021.149486

Cited by 12 publications

(16 citation statements)

References 127 publications

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“…Redox active elements (Cr and Cu) can contribute to the production of ROS . Ti and Ni may be agents in ROS formation and transformation . Lu et al conducted Pb exposure experiments and observed that Pb can induce oxidative stress by causing elevated ROS generation and lipid peroxidation.…”

Section: Resultsmentioning

confidence: 99%

“…50 Ti and Ni may be agents in ROS formation and transformation. 51 Lu et al 52 conducted Pb exposure experiments and observed that Pb can induce oxidative stress by causing elevated ROS generation and lipid peroxidation. Previous studies demonstrated that Se and REEs increased the generation and accumulation of ROS.…”

Section: Oxidative Potential Of <1 μM Fractions In Mqmentioning

confidence: 99%

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Oxidative Potential of Metal-Containing Nanoparticles in Coal Fly Ash Generated from Coal-Fired Power Plants in China

Niu

Liu

et al. 2023

Environ. Health

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The overwhelming magnitude of coal-fired power plants has caused an inevitable release of metal-containing nanoparticles (MNPs) into the atmosphere, which may be inhaled into the respiratory system and cause oxidative stress. In this study, MNPs and oxidative potential (OP) were analyzed in <1 μm fractions of 56 coal fly ashes collected from Chinese CFPPs. The particle number concentrations (PNCs) of Fe- and Ti-containing NPs, as the dominant MNPs in CFAs, were in the range of 1.5 × 109 to 9.4 × 1010 and 6.4 × 108 to 4.1 × 1010 particles/mg, with average particle sizes of 87 and 89 nm, respectively. Average OP values of <1 μm fractions were 1.4–2.2 nmol AA min–1 μg–1 for three simulated lung fluids, which were 2–3 orders of magnitude higher than those of urban atmospheric PM2.5. According to structural equation model analysis, metal concentrations in <1 μm fractions, PNCs of Fe-/Ti-containing NPs, and their corresponding dissolved Fe/Ti (including NPs with minute sizes) can regulate OP of <1 μm fractions in CFAs. Elevated PNCs of MNPs in CFAs can be produced by CFPPs burning low-rank coals and with a low combustion efficiency boiler (e.g., circulating fluidized-bed boiler). Once entering lung fluids, they likely release more dissolved metals or tiny corresponding NPs, thus generating greater OP. This study provides the first comprehensive investigation of OP generated by MNPs in CFAs.

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Section: Resultsmentioning

confidence: 99%

Section: Oxidative Potential Of <1 μM Fractions In Mqmentioning

confidence: 99%

Oxidative Potential of Metal-Containing Nanoparticles in Coal Fly Ash Generated from Coal-Fired Power Plants in China

Niu

Liu

et al. 2023

Environ. Health

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“…It has been suggested that measuring indicators of the oxidative stress of PM, such as OP, might help to identify some of the many possible drivers of the associated health effects (Daellenbach et al, 2020). Although this link remains subject to relevant uncertainty (Bates et al, 2015;Daellenbach et al, 2020;Weichenthal et al, 2016), it has been applied in a number of studies (e.g., Abbasi et al, 2020;Borlaza et al, 2021aBorlaza et al, , 2021bCalas et al, 2018Calas et al, , 2019Cesari et al, 2019;Charrier et al, 2015;Daellenbach et al, 2020;Gulliver et al, 2018;Janssen et al, 2014;Li et al, 2019;Naraki et al, 2021;Trechera et al, 2021;Wang et al, 2018;Weber et al, 2018Weber et al, , 2019.…”

Section: Introductionmentioning

confidence: 99%

Discovering oxidative potential (OP) drivers of atmospheric PM10, PM2.5, and PM1 simultaneously in North-Eastern Spain

Veld

Pandolfi

Amato

et al. 2023

Science of The Total Environment

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“…Several studies have investigated RCMD constituents and their likely sources [15][16][17][18]. Recent work by Pokhrel et al [19] specifically looked at non-carbonate mineral content as a proxy for rock-strata sourced dust in RCMD.…”

Section: Introductionmentioning

confidence: 99%

On the Occurrence and Persistence of Coal-Mineral Microagglomerates in Respirable Coal Mine Dust

Gonzalez

Keleş

Sarver

2022

Mining, Metallurgy & Exploration

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A previous effort to characterize respirable coal mine dust in 16 US mines turned up a curious finding: particle-based analysis using scanning electron microscopy (SEM) tended to overpredict the abundance of dust sourced from rock strata, and underpredict the abundance of coal, when compared to mass-based thermogravimetric analysis (TGA). One possible explanation is the occurrence of coal-mineral microagglomerates (MAGs). Coal particles covered with fine mineral dust could be mostly coal by mass but classified as minerals by SEM due to their surface elemental content. In the current study, a subset of the previously analyzed mine dust samples were re-examined, and SEM images and elemental mapping showed that MAGs are indeed present. Further, dust samples were created and sampled passively in the laboratory, demonstrating that MAG formation can occur due to dust generation processes and the sampling environment, rather than as a mere artifact of respirable dust sampling procedures. Finally, experiments were conducted to evaluate dispersibility of MAGs in liquid suspensions, which might shed some light on their possible fate upon inhalation. Results indicated that sonication in deionized water was effective for MAG dispersion, and a solution that mimics natural lung surfactant also appeared to enhance dispersibility. An understanding of MAG occurrence might be important in terms of exposure assessment.

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Geochemistry and oxidative potential of the respirable fraction of powdered mined Chinese coals

Cited by 12 publications

References 127 publications

Oxidative Potential of Metal-Containing Nanoparticles in Coal Fly Ash Generated from Coal-Fired Power Plants in China

Oxidative Potential of Metal-Containing Nanoparticles in Coal Fly Ash Generated from Coal-Fired Power Plants in China

Discovering oxidative potential (OP) drivers of atmospheric PM10, PM2.5, and PM1 simultaneously in North-Eastern Spain

On the Occurrence and Persistence of Coal-Mineral Microagglomerates in Respirable Coal Mine Dust

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