Removal of Metal Cations from Water Using Zeolites

Details

• Personal Author:
  Murphy JE ; Zamzow, M. J.
• Description:
  Zeolites from abundant natural deposits were investigated by the Bureau of Mines for efficiently cleaning up mining industry wastewaters. Twenty-four zeolite samples were analyzed by x-ray diffraction and inductively coupled plasma. These included clinoptilolite, mordenite, chabazite, erionite, and phillipsite. Bulk densities of a sized fraction (-40, +65 mesh) varied from 0.48 to 0.93 g/mL. Attrition losses ranged from 1 to 18% during an hour-long shake test. The 24 zeolites and an ion-exchange resin were tested for the uptake of Cd, Cu, and Zn. Of the natural zeolites, phillipsite proved to be the most efficient, while the mordenites had the lowest uptakes. Sodium was the most effective exchangeable ion for exchange of heavy metals. Wastewater from an abandoned copper mine in Nevada was used to test the effectiveness of clinoptilolite for treating a multi-ion wastewater. The metal ions Fe3+, Cu2+, and Zn2+ in the copper mine wastewater were removed to below drinking water standards, but Mn2+ and Ni2+ were not. Calcium and NH4+ interfered with the uptake of heavy metals. Adsorbed heavy metals were eluted from zeolites with a 3% NaCl solution. Heavy metals were concentrated in the eluates up to 30-fold relative to the waste solution. Anions were not adsorbed by the zeolites. [Description provided by NIOSH]
• Subjects:
  Metals Metals, Heavy Minerals Mining Occupational Health Safety Waste Management
• Keywords:
  Copper-compounds Heavy-metals Metal-compounds Metallic-compounds Metallic-minerals Mineral-deposits Mineral-processing Mining-industry Waste-treatment
• Series:
  Mining Publications
• ISSN:
  0149-6395
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Nevada ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  RERC - Reno Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  27
• Issue:
  14
• NIOSHTIC Number:
  nn:10012089
• Citation:
  Sep Sci Technol 1992 Nov; 27(14):1969-1984
• CAS Registry Number:
  Cadmium (CAS RN 7440-43-9) ; Calcium (CAS RN 7440-70-2) ; Copper (CAS RN 7440-50-8) ; Sodium (CAS RN 7440-23-5) ; Zinc (CAS RN 7440-66-6)
• Federal Fiscal Year:
  1993
• Peer Reviewed:
  True
• Source Full Name:
  Separation Science and Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:be98d378f9907770cc6f141e0e919b281600f14ed4653a5b328872b21c9077806d27edb1352aaf32041d1dee8af151906eb0974439f84b5c73f7d4d68e91520e
• Download URL:
  https://stacks.cdc.gov/view/cdc/220234/cdc_220234_DS1.pdf
• File Type:
  [PDF - 769.98 KB ]