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Report of Investigations 9292: The Influence of Sulfate Ion on the Coal-Wetting Performance of Anionic Surfactants

Public Domain
File Language:
English


Details

  • Journal Article:
    MISSING
  • Personal Author:
    Kilau, Howard W.
  • Description:
    The Bureau of Mines is investigating surfactants added to water sprays to enhance the control of dust during coal mining operations. The objective of the present work was to establish the general applicability of adding sulfate ion to anionic surfactant solutions in order to improve wetting action. This was pursued through laboratory wettability testing of four anionic surfactants and one nonionic surfactant in combination with various concentrations of sulfate ion. The experimental results demonstrated that the addition of sulfate ion enhanced the wetting characteristics of all the anionic surfactants when applied to hard-to-wet coals, while easy-to-wet coal showed more complex wetting behavior. Sulfate ion in the presence of nonionic surfactant enhanced wetting only slightly or not at all. Surface tension measurements of the dilute aqueous surfactant-sulfate anion solutions indicated this property was not important in coal-wetting phenomena, as long as the value was below the critical value for coal. Sulfate ion helps surfactant reduce surface tension but primarily appears to affect wetting action by altering the adsorption characteristics of surfactant on the coal surface. [Description provided by NIOSH]
  • Subjects:
  • Source:
    MISSING :30 pages
  • Series:
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
    Report
  • Place as Subject:
    United States
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    TCRC - Twin Cities Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    36 pdf pages
  • NIOSHTIC Number:
    nn:10007392
  • Federal Fiscal Year:
    1990
  • Peer Reviewed:
    False
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:c39b53a04fc9633cec4a812e242f2378b918353a9bafd60d91ae83681483925a06623a94fb8b0ab0e8b5392d162cafe8a49be47ab40ef14e48ad8bb8289c6a9e
  • Download URL:
  • File Type:
    Filetype[PDF - 1.19 MB ]
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