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AMD Cleanup Using Natural Zeolites

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  • Personal Author:
  • Description:
    The U.S. Bureau of Mines is investigating the use of natural zeolites to remove metals from acid mine drainage (AMD). The loading characteristics of Al3+, Ca2+, Cu2+, Fe2+, H+, Mg2+, and Zn+ were studied for samples of clinoptilolite from Barstow, CA, Buckhorn, NM, and Hector, CA. The relative order of cation selectivity was Zn2+ > Ca2+, Cu2+ > Fe2+ >H+> Mg+> Al3+. The order of exchange capacity for the three zeolites was Hector> Barstow> Buckhorn, which corresponds to the Na content of the three zeolite samples. An acid mine drainage sample from the Rio Tinto Mine, an abandoned copper mine in northeastern Nevada, was used to measure the zeolites' cleanup potential. This water contained, in mg/L, 152 AI3+, 502 Ca2+, 101 Cu2+, 595 Fe2+/3+, 80 Mn2+, and 61 Zn2+. At an approximate flow rate of 4 mL/min (5 bed vol/h), 75% as much zeolite was required to clean the water to drinking water standards when the Hector material was used as compared with the zeolites from Buckhorn or Barstow. Zeolites were regenerated using 25% sodium chloride solutions. Loading and regeneration studies show no detectible degradation in the loading ability of the zeolites through 18 cycles. [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:
    RERC - Reno Research Center
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    341-347
  • Volume:
    2
  • NIOSHTIC Number:
    nn:20050436
  • 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; 2:341-347
  • 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:f6ea5648617ccadb316daa156a4b04cceb5de6c2b208474fa15d931744486461d4f1e881adfe639319f6bb3a20d37a45788bf8b0b27bb8511198653d5fb61605
  • Download URL:
  • File Type:
    Filetype[PDF - 164.04 KB ]
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