Original scientific paper
FLUORHYDROGEN EMISSION IN ALUMINIUM OXIDE ELECTROLYSIS - HARMFULNESS DIFFICULT TO ERADICATE
JAGODA DOKO JELINIĆ
JADRANKA MUSTAJBEGOVIĆ
Abstract
The aim was to assess the effects of upgraded technological process for aluminium oxide electrolysis on the presence and level of concentration of fluorhydrogen in the work environment. Results of mandatory periodic measurements of chemical and physical factors in the work environment in company Aluminij d.d. Mostar were compared. Measurements were taken before the war, in 1988, and following the reconstruction and modernisation of the plant in 2004. Measurements to confirm the presence and concentrations of fluorhydrogen were made at the same workplaces and using the same methods. Test results obtained were expressed as the mean value of three separate measurements. Fluorhydrogen concentrations following the modernisation were compared to those before the modernisation. Results from 1988 show higher fluorhydrogen concentrations at all workplaces. Concentrations of up to 10 times higher than those allowed were recorded in open cells. After the modernisation, the measured concentrations exceeded those allowed in 82.3% of the samples. In open cells those values were up to 6 times higher than those in closed cells, and in the latter case they were clustered around the limit values. The modernisation of the technological process did not remove the exposure to fluorhydrogen but only partly reduced it.
Keywords
fluorhydrogen; electrolytic cells modernisation
Hrčak ID:
7912
URI
Publication date:
20.12.2006.
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