[Evaluation of exposure to fluorine compounds in aluminum metallurgy].
concentrations of hydrogen fluoride and fluorides were determined near pots with a vertical pin Söderberg anodes and near the prototype pot with a prebaked anode. Samples were collected by the stationary method and with personal samplers (Casella) where the membrane filter was connected with the bubbler filled with 0.1 M NaOH. Hydrogen fluoride and fluorides were determined by colorimetric and potentiometric methods. Altogether 300 samples were determined. Fluorides concentrations near pots with Söderberg anodes ranged between 1.42-2.43 mg/m3 (P = 95), geometric mean being 1.86 mg/m3 (with stationary and personal samples). The range of hydrogen fluoride concentrations was 1.28-3.08 mg/m3 (P = 95), whereas geometric mean--1.99 mg/m3 (personal samples). Hydrogen fluoride concentrations in stationary samples were lower (geometric mean--1.47 mg/m3). Fluorides concentrations during the tests with the prototype pot (prebaked anode) were five times lower, as compared to fluorides concentrations near the traditional pots.
D000535:Aluminum; D004781:Environmental Exposure; D005459:Fluorides / Q000032:analysis*; D006858:Hydrofluoric Acid / Q000032:analysis*; D008669:Metallurgy / Q000295:instrumentation
D000535:Aluminum; D005459:Fluorides; D006858:Hydrofluoric Acid
Ocena narazenia na zwiazki fluoru wystepujace w hutnictwie aluminium.