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An Evaluation of Pyrite as a Component of Respirable Coal Dust



Details

  • Personal Author:
  • Description:
    Over the past two decades, the rise in coal worker's pneumoconiosis has prompted research into the effects of respirable coal dust components. This study explores how coal-pyrites produce hydroxyl radicals (oOH), a reactive oxygen species closely associated with particle toxicity, and assesses the ability of safe chemical additives to reduce oOH production at various pH levels. Promising candidates were evaluated in various solutions, including tap and process waters and simulated lung fluid. We employed electrokinetic measurements, infrared and X-ray photoelectron spectroscopies, and ab initio atomistic simulations to analyze particle surfaces. The study also looked at how surface aging affects oOH production. Our results show that oOH generation of the pyrite varies and is catalyzed by elements like silicon, aluminum, and iron in pyrite. Carboxymethyl cellulose was effective in reducing oOH production by targeting surface sulfide and silicon sites and affecting surface hydration and charge. Atmospheric aging was found to increase oOH production, especially in the pyrite with high iron and silicon and low calcium contents, relative to other samples. This highlights the role of the pyrite surface properties and chemical composition, and the solution pH and composition in oOH generation by coal-pyrites. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    0304-3894
  • Document Type:
    Text
  • Funding:
    Contract
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    477
  • NIOSHTIC Number:
    nn:20069991
  • Citation:
    J Hazard Mater 2024 Sep; 477:135340
  • Contact Point Address:
    Barbara J. Arnold, John and Willie Leone Family Department of Energy and Mineral Engineering, College of Earth and Mineral Science, The Pennsylvania State University, University Park, PA 16802, USA
  • Email:
    bja4@psu.edu
  • CAS Registry Number:
    Pyrite (CAS RN 1309-36-0)
  • Federal Fiscal Year:
    2024
  • Performing Organization:
    Pennsylvania State University
  • Peer Reviewed:
    True
  • Start Date:
    20210901
  • Source Full Name:
    Journal of Hazardous Materials
  • End Date:
    20240331
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:3adb3a8508d29e1cb535ce1e9fe26f1bdfd91e98bbf2d7f09450b1aac6dc862be160bfc7c9290e06ec2fd33184af6382da79d492e7a6f97c6143c1af82e71a3f
  • Download URL:
  • File Type:
    Filetype[PDF - 2.89 MB ]
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