The Interrelation of Factors Influencing the Dissolution of Metals in Columns of Mine Tailings

Details

• Personal Author:
  Doepker RD
• Description:
  The dissolution of metal species from silver mine mill tailings containing quartz (70%) and manganiferous siderite was investigated using a column leach procedure. The effects of leachant ionic strength, pH, and buffering ability were examined. The results indicated increased metal transport with increased ionic strength and decreased pH. In another test series, matched sets of columns were compared to determine the effect of leachate residence time on metal concentration. In these tests, leachate metal ion concentrations more than doubled in columns that were allowed to evaporate (wet/dry cycle) about 30% of their pore leachate volume. The pH of the leachate eluted from the dry cycle (unsaturated column) decreased while the conductance increased. Increases of five times were observed for lead and manganese, while increases of two orders of magnitude were seen for zinc and cadmium. The wet/ dry cycle effect was enhanced during subsequent cycles, but appeared not to be influenced by the addition of sodium lauryl sulfate, sodium benzoate, or phenol, which are known to inhibit microorganism involvement. Increased sensitivity to further oxidation of those columns that underwent the dry cycle became apparent through increased deviation of the ion yields from duplicate columns. The interrelation of the above factors with the composition of the tailings present adds complexity to determining dissolution mechanisms. [Description provided by NIOSH]
• Subjects:
  Cadmium Dust Lead Manganese Metals Mining Occupational Health Phenol Quartz Safety Silicon Dioxide Silver Zinc Compounds

  More +
• Keywords:
  Cadmium-compounds Lead-compounds Manganese-compounds Mining-industry Oxidation Phenols Quartz-dust Silver-compounds Sodium-compounds Zinc-compounds
• Series:
  Mining Publications
• Publisher:
  U.S. Bureau of Mines
• Document Type:
  Text
• Genre:
  Conference Publications ; Proceedings
• Place as Subject:
  OSHA Region 10 ; OSHA Region 3 ; Pennsylvania ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  SRC - Spokane Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  210-219
• NIOSHTIC Number:
  nn:20024755
• Citation:
  Mine Drainage and Surface Mine Reclamation. Volume I: Mine Water and Mine Waste. Pittsburgh, PA: U.S. Bureau of Mines, 1988 Apr; :210-219
• CAS Registry Number:
  Cadmium (CAS RN 7440-43-9) ; Lead (CAS RN 7439-92-1) ; Manganese (CAS RN 7439-96-5) ; Quartz (SiO2) (CAS RN 14808-60-7) ; Silver (CAS RN 7440-22-4) ; Sodium dodecyl sulfate (CAS RN 151-21-3) ; Zinc (CAS RN 7440-66-6)
• Federal Fiscal Year:
  1988
• Peer Reviewed:
  False
• Source Full Name:
  Mine Drainage and Surface Mine Reclamation. Volume I: Mine Water and Mine Waste
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e53fc6ffa938fc06e4203507029cff3429ac72adc73ff69c0ad7756dda4afb419e3e65bf4fa1b24cff871948f5c947ceeb0b4212661f35a9495cb6e2907d7e29
• Download URL:
  https://stacks.cdc.gov/view/cdc/220830/cdc_220830_DS1.pdf
• File Type:
  [PDF - 1.38 MB ]