Polycyclic aromatic hydrocarbons in the work atmosphere – determination of area-specific concentrations and job-specific exposure in a vertical pin Søderberg aluminum plant

Abstract

Polycyclic aromatic hydrocarbons (PAH) and particulates in the work atmospheres of the potrooms and anode paste plant of an Al reduction plant were determined by stationary and personal sampling and glass capillary gas chromatography. The relative distribution of PAH (PAH profile), the fraction of PAH on particulates and the ratio between particulate and gaseous PAH were also determined. The PAH profile was similar to that found for another Al plant. The PAH fraction of particulate matter was generally between 1-4% and ratio between particulate and gaseous PAH in the potrooms varied from 0.2-1. The occupational exposures were determined from an analysis of 167 personal samples. For most job categories, the geometric mean of the exposure values was > 40 .mu.g/m3, spike pulling having the highest exposure.