Comparison of Respirable Coal Mine Dust Constituents Estimated using FTIR, TGA, and SEM–EDX

Pokhrel, Nishan; Agioutanti, Eleftheria; Keleş, Çiğdem; Afrouz, Setareh Ghaychi; Sarver, Emily

doi:10.1007/s42461-022-00567-3

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…This step change in technology allows for images of the individual particles to be taken and correlated for the detection of the numerous mineralogies present and the calculation of the particle size distributions for the various mineralogies. Several groups have undertaken characterisation work in recent years in the US, Australia and other parts of the world using various characterization methodologies [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Many of these studies utilized SEMs with energy dispersive X-ray spectroscopy (EDX or EDS) [12,14,18,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Several groups have undertaken characterisation work in recent years in the US, Australia and other parts of the world using various characterization methodologies [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Many of these studies utilized SEMs with energy dispersive X-ray spectroscopy (EDX or EDS) [12,14,18,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…In the last several years, a portion of the respirable coal mine dust characterization work has moved to characterizing ambient air samples on filters due to the many dust sources present in underground mines [13,14,21,22,26,27]. For coal mines, these sources may include coal cutting methods such as the continuous miner or longwall, drilling or roof bolting activities, stone dusting (rock dusting), and dust generated by vehicle traffic, including the re-entrainment of roadway dust and diesel particulate emissions, as well as other dust-generating activities in the mine, such as shovelling.…”

Section: Introductionmentioning

confidence: 99%

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Method for the Analysis of Respirable Airborne Particulates on Filter Using the Mineral Liberation Analyser

LaBranche,

Wightman,

Teale

et al. 2023

Minerals

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In recent years, the Mineral Liberation Analyser (MLA) has played a pivotal role in analysing respirable and inhalable ambient air samples collected on filters from both underground coal and metalliferous mines. Leveraging backscattered electron (BSE) image analysis and X-ray mineral identification, the MLA offers automated quantitative mineral characterization. The escalating prevalence and severity of mine dust lung diseases, particularly among young miners, have reignited interest in comprehensively understanding the dust’s characterization, encompassing mineralogy, particle size, and shape. Merely measuring total respirable dust exposure and its duration based on gravimetrically determined weight is no longer deemed sufficient in addressing the evolving landscape of occupational health challenges in mining environments. Since the publication of previous studies, efforts have been dedicated to refining the Mineral Liberation Analyser (MLA) methodology for respirable dust sampling. This refinement, discussed in detail in this paper, encompasses various enhancements, such as the implementation of data checks to identify carbon contamination, backscattered electron (BSE) drift, and the misclassification of X-ray spectra. Additionally, an examination of sampling efficiency led to the exploration of using smaller samples as an alternative to the time-intensive analysis of entire filters. Furthermore, this paper presents a reanalysis of paired filter sample sets previously reported using the Sarver Group Methodology. These samples are subjected to analysis using the Mineral Liberation Analyser, providing a more detailed illustration of the outputs derived from the updated methodology and compared to previously published MLA data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Method for the Analysis of Respirable Airborne Particulates on Filter Using the Mineral Liberation Analyser

LaBranche,

Wightman,

Teale

et al. 2023

Minerals

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Assessment of Exposure to Fine Particulate Matter, Specifically Silica, in a Stone Crushing Unit: A Case Study at Neem Ka Thana District, Rajasthan

Sharma,

Kaul,

Khandelwal

et al. 2024

Lecture Notes in Civil Engineering

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Effects of dust controls on respirable coal mine dust composition and particle sizes: case studies on auxiliary scrubbers and canopy air curtain

Animah,

Keles,

Reed

et al. 2024

Int J Coal Sci Technol

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Control of dust in underground coal mines is critical for mitigating both safety and health hazards. For decades, the National Institute of Occupational Safety and Health (NIOSH) has led research to evaluate the effectiveness of various dust control technologies in coal mines. Recent studies have included the evaluation of auxiliary scrubbers to reduce respirable dust downstream of active mining and the use of canopy air curtains (CACs) to reduce respirable dust in key operator positions. While detailed dust characterization was not a focus of such studies, this is a growing area of interest. Using preserved filter samples from three previous NIOSH studies, the current work aims to explore the effect of two different scrubbers (one wet and one dry) and a roof bolter CAC on respirable dust composition and particle size distribution. For this, the preserved filter samples were analyzed by thermogravimetric analysis and/or scanning electron microscopy with energy dispersive X-ray. Results indicate that dust composition was not appreciably affected by either scrubber or the CAC. However, the wet scrubber and CAC appeared to decrease the overall particle size distribution. Such an effect of the dry scrubber was not consistently observed, but this is probably related to the particular sampling location downstream of the scrubber which allowed for significant mixing of the scrubber exhaust and other return air. Aside from the insights gained with respect to the three specific dust control case studies revisited here, this work demonstrates the value of preserved dust samples for follow-up investigation more broadly.

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Comparison of Respirable Coal Mine Dust Constituents Estimated using FTIR, TGA, and SEM–EDX

Cited by 10 publications

References 22 publications

Method for the Analysis of Respirable Airborne Particulates on Filter Using the Mineral Liberation Analyser

Method for the Analysis of Respirable Airborne Particulates on Filter Using the Mineral Liberation Analyser

Assessment of Exposure to Fine Particulate Matter, Specifically Silica, in a Stone Crushing Unit: A Case Study at Neem Ka Thana District, Rajasthan

Effects of dust controls on respirable coal mine dust composition and particle sizes: case studies on auxiliary scrubbers and canopy air curtain

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