Effect of Altitude, Sample Port Inlet Loading, and Temperature on the Volumetric Flow Rate of the MSA Escort® Elf Constant-Flow-Rate Pump

Gero, Andrew J.; Parobeck, P.S.; Suppers, Karen L.; Apel, Bruce P.; Jolson, Joseph D.

doi:10.1080/1047322x.1997.10390632

Cited by 1 publication

(1 citation statement)

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“…For collection of respirable dust samples in the field for SEM-EDX analysis, an appropriate pump deemed permissible for use in underground coal mines must be used; at present, the MSA Escort ELF pump is almost exclusively used for such applications because it has the capability to maintain near constant flow rate under a variety of environmental conditions [20]. To ensure collection of only respirable dust particles and, thus, rejection of particles above the respirable range, the pump should be operated with a cyclone at a flow rate between about 1.7-2.2 L/min [21], such that the cyclone median cut point is 4 μm according to the NIOSH 0600 method of sampling [22].…”

Section: Sample Collection and Filter Preparationmentioning

confidence: 99%

A Standard Characterization Methodology for Respirable Coal Mine Dust Using SEM-EDX

Sellaro

Sarver

Baxter³

2015

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A key consideration for responsible development of mineral and energy resources is the well-being of workers. Respirable dust in mining environments represents a serious concern for occupational health. In particular, coal miners can be exposed to a variety of dust characteristics depending on their work activities, and some exposures may pose risk for lung diseases like CWP and silicosis. As underscored by common regulatory frameworks, respirable dust exposures are generally characterized on the basis of total mass concentration, and also the silica mass fraction. However, relatively little emphasis has been placed on other dust characteristics that may be important in terms of identifying health risks. Comprehensive particle-level analysis to estimate chemistry, size, and shape distributions of particles is possible. This paper describes a standard methodology for characterization of respirable coal mine dust using scanning electron microscopy (SEM) with energy dispersive X-ray (EDX). Preliminary verification of the method is shown based several dust samples collected from an underground mine in Central Appalachia.

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Section: Sample Collection and Filter Preparationmentioning

confidence: 99%