A Field Study on the Respiratory Deposition of the Nano-Sized Fraction of Mild and Stainless Steel Welding Fume Metals (original) (raw)

Journal of Occupational and Environmental Hygiene

Abstract

A field study was conducted to estimate the amount of Cr, Mn and Ni deposited in the respiratory system of 44 welders in two facilities. Each worker wore a nanoparticle respiratory deposition (NRD) sampler during gas metal arc welding (GMAW) of mild and stainless steel and flux-cored arc welding (FCAW) of mild steel. Several welders also wore side-by-side NRD samplers and closed- face filter cassettes for total particulate samples. The NRD sampler estimates the aerosol's nano-fraction deposited in the respiratory system. Mn concentrations for both welding processes ranged 2.8-199 μg/m(3); Ni concentrations ranged 10 -51 μg/m(3); Cr concentrations ranged 40-105 μg/m(3). Cr(VI) concentrations ranged between 0.5-1.3 μg/m(3). For the FCAW process the largest concentrations were reported for welders working in pairs. As a consequence this often resulted in workers being exposed to their own welding fumes and to those generated from the welding partner. Overall no correlation was foun...

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