Physicochemical Characterization of Simulated Welding Fumes from a Spark Discharge System

Details

• Personal Author:
  Grassian VH ; Kim JS ; Mudunkotuwa IA ; Park JH ; Peters TM ; Stanam A ; Thorne PS
• Description:
  This study introduces a spark discharge system (SDS) as a way to simulate welding fumes. The SDS was developed using welding rods as electrodes with an optional coagulation chamber. The size, morphology, composition, and concentration of the fume produced and the concentration of ozone (O3) and nitrogen oxides (NOX) were characterized. The number median diameter (NMD) and total number concentration (TNC) of fresh fume particles were ranged 10-23 nm and 3.1×107 - 6×107 particles/cm3, respectively. For fresh fume particles, the total mass concentration (TMC) measured gravimetrically ranged 85-760 ug/m3. The size distribution was stable over a period of 12 h. The NMD and TNC of aged fume particles were ranged 81-154 nm and 1.5×106-2.7×106 particles/cm3, respectively. The composition of the aged fume particles was dominated by Fe and O with an estimated stoichiometry between that of Fe2O3 and Fe3O4. Concentrations of O3 and NOX were ranged 0.07-2.2 ppm and 1-20 ppm, respectively. These results indicate that the SDS is capable of producing stable fumes over a long-period that are similar to actual welding fumes. This system may be useful in toxicological studies and evaluation of instrumentation. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Environmental Monitoring Occupational Health Ozone Particulate Matter Safety Welding
• Keywords:
  Airborne Particles Air Sampling Techniques Iron Oxide Dust And Fume Iron Oxides Nitrogen Oxides Particulates Simulation Methods Welding Equipment Welding Fumes
• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  48
• Issue:
  7
• NIOSHTIC Number:
  nn:20053923
• Citation:
  Aerosol Sci Technol 2014 Jul; 48(7):768-776
• Contact Point Address:
  Thomas M. Peters, Department of Occupational and Environmental Health, University of Iowa, 105 River Street, S331 CPHB, Iowa City, IA 52242, USA
• Email:
  thomas-m-peters@uiowa.edu
• CAS Registry Number:
  Ferrous oxide (CAS RN 1345-25-1) ; Iron oxide (Fe2O3) (CAS RN 1309-37-1) ; Nitrogen dioxide (CAS RN 10102-44-0) ; Ozone (CAS RN 10028-15-6)
• Federal Fiscal Year:
  2014
• Performing Organization:
  University of Iowa, Iowa City
• Peer Reviewed:
  True
• Start Date:
  20130901
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20180831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:bda1bb2d9452eeb1b703fb3f9f92847520b10897d874f9d511044bb89c7bd91487f7e855e62dd6d907dbfc6145e14cdc3870dcd1fa1c4c9dc82e7fb2479f369c
• Download URL:
  https://stacks.cdc.gov/view/cdc/216592/cdc_216592_DS1.pdf
• File Type:
  [PDF - 852.92 KB ]