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i

Use of a Bromide Tracer to Determine Retention Time of Mine Drainage in Anoxic Limestone Drains

Public Domain


Details

  • Personal Author:
  • Description:
    A tracer test using sodium bromide (NaBr) was performed on two anoxic limestone drains (ALD's) to determine the retention time (RT) of mine drainage in the ALD's. The Howe Bridge ALD, located in Jefferson County, PA, is the larger of the two drains with the capacity to hold 133,280 L of water. It has a mean flow rate of 87 L/min and has an estimated RT of 25.5 h. The Morrison ALD, located in Clarion County, PA, has the capacity to hold 20,090 L of water, a mean flow rate of 8.0 L/min and an estimated RT of 41.9 h. Estimated RT's were determined by dividing the estimated capacity of the drain by the flow rate, then expressing the result in hours. The tracer test consisted of pouring a concentrated solution of NaBr into an access area near the beginning of the drain and then measuring the concentration of bromide in the effluent water. Mean RT's were calculated from the change in the concentration of bromide over the duration of the test. The Howe Bridge ALD had a mean RT of 42 h, while the Morrison ALD had a mean RT of 87 h. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Series:
    Mining Publications
  • Publisher:
    U.S. Department of the Interior, Bureau of Mines
  • Document Type:
    Text
  • Genre:
    Proceedings
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    PRC - Pittsburgh Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    2
  • NIOSHTIC Number:
    nn:20050597
  • Citation:
    Proceedings of the International Land Reclamation and Mine Drainage Conference and Third International Conference on the Abatement of Acidic Drainage April 24-29, 1994, Pittsburgh, Pennsylvania. Pittsburgh, PA: United States Department of the Interior, Bureau of Mines, Special Publication SP 06B-94, 1994 Apr; 2:408
  • Federal Fiscal Year:
    1994
  • Peer Reviewed:
    False
  • Source Full Name:
    Proceedings of the International Land Reclamation and Mine Drainage Conference and Third International Conference on the Abatement of Acidic Drainage April 24-29, 1994, Pittsburgh, Pennsylvania
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:0a0bafae285583ebc865e84837ec4f1350fec99e36266149787298f2cba9698ac95be39c8d0ef304f5801f15afadace9139a52c4ddd68bc42455071b999543de
  • Download URL:
  • File Type:
    Filetype[PDF - 853.70 KB ]
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