Abstract
The effect of metals and ammonia on the relationship between mass concentrations of sulphur dioxide and sulphate in the air was studied near an aluminium plant over a 1-year period. Sulphur dioxide, sulphates and ammonia in the air as well as metals (Pb, Fe, Mn, Zn, Cu, Cd and Al) in the deposit were measured at four measuring sites.
The levels of mass concentrations of SO2 were low at all measuring sites while the levels of mass concentrations of sulphates in the air and concentrations of metals in the deposit were high. The levels of ammonia were found to decrease in relationship to the distance from the source of pollution.
The relationship between the mass concentrations of sulphate and SO2 can be described by the equation y=ax b;where y is the percentage of sulphate sulphur in the total sulphur (sulphate and SO2) and x is the mass concentration of the total sulphur in the air. The values of the coefficients a and b are characteristic of individual areas.
As the results show the coefficients a and b obtained at a measuring site close to the plant and outside the urban area are characteristic of an industrial area. At control sites in the urban area the coefficients are characteristic of an urban area. At the measuring site close to the industrial zone and the centre of the urban area the interaction of the effects occurs. Therefore, the coefficient a is characteristic of an urban area and b of an industrial one.
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Vadjić, V., Gentilizza, M., Hršak, J. et al. The effect of metals and ammonia on SO2 oxidation to sulphates in the ambient air. Environ Monit Assess 18, 163–171 (1991). https://doi.org/10.1007/BF00398697
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DOI: https://doi.org/10.1007/BF00398697