Removal of Heavy Metals from Aqueous Systems with Thiol Functionalized Superparamagnetic Nanoparticles

Details

• Personal Author:
  Addleman RS ; Carter TG ; Fryxell GE ; Sangvanich T ; Timchalk C ; Warner CL ; Warner MG ; Wiacek RJ ; Yantasee W
• Description:
  We have shown that superparamagnetic iron oxide (Fe3O4) nanoparticles with a surface functionalization of dimercaptosuccinic acid (DMSA) are an effective sorbent material for toxic soft metals such as Hg, Ag, Pb, Cd, and Tl, which effectively bind to the DMSA ligands and for As, which binds to the iron oxide lattices. The nanoparticles are highly dispersible and stable in solutions, have a large surface area (114 m2/g), and have a high functional group content (1.8 mmol thiols/g). They are attracted to a magnetic field and can be separated from solution within a minute with a 1.2 T magnet. The chemical affinity, capacity, kinetics, and stability of the magnetic nanoparticles were compared to those of conventional resin based sorbents (GT-73), activated carbon, and nanoporous silica (SAMMS) of similar surface chemistries in river water, groundwater, seawater, and human blood and plasma. DMSA-Fe3O4 had a capacity of 227 mg of Hg/g, a 30-fold larger value than GT-73. The nanoparticles removed 99 wt% of 1 mg/L Pb within a minute, while it took over 10 and 120 min for Chelex-100 and GT-73 to remove 96% of Pb. [Description provided by NIOSH]
• Subjects:
  Chemistry Hazardous Substances Metals Occupational Health Poisoning Safety
• Keywords:
  Analytical-instruments Analytical-processes Chemical-binding Chemical-extraction Chemical-properties Metal-compounds Metal-oxides Metallic-compounds Metallic-poisons Nanotechnology Organic-compounds Toxic-materials

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• ISSN:
  0013-936X
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  41
• Issue:
  14
• NIOSHTIC Number:
  nn:20032451
• Citation:
  Environ Sci Technol 2007 Jul; 41(14):5114-5119
• Contact Point Address:
  Pacific Northwest National Laboratory, Richland, WA 99352
• CAS Registry Number:
  Carbon (CAS RN 7440-44-0) ; Ferrous oxide (CAS RN 1345-25-1) ; Silica (CAS RN 7631-86-9)
• Federal Fiscal Year:
  2007
• Performing Organization:
  Battelle Pacific Northwest Laboratories
• Peer Reviewed:
  True
• Start Date:
  20060901
• Source Full Name:
  Environmental Science and Technology
• End Date:
  20090831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7ea0c7ed367f0f31da94f06991eb5f8af1da67ea01f7a7587eaac2f76cc073358d642012efc70a7917b2daadadd7c804b3d7979938bcff2f9d7af5cce632e6ed
• Download URL:
  https://stacks.cdc.gov/view/cdc/186409/cdc_186409_DS1.pdf
• File Type:
  [PDF - 219.78 KB ]