Wind distribution of pollutants from metallurgical enterprises

Autor: Yu. S. Yusfin, N. M. Durov, G. S. Podgorodetskii, V. V. Korovushkin
Rok vydání: 2009
Předmět:
Zdroj: Steel in Translation. 39:217-221
ISSN: 1935-0988
0967-0912
DOI: 10.3103/s0967091209030085
Popis: The composition and properties of the sample are determined by X-ray fluorescent analysis, Mossbauer spectroscopy, pH measurement, and measurement of the magnetic susceptibility. The Mossbauer data are obtained by means of an MS-1104Es spectrometer with a Co 57 source in a chromium matrix. Powder samples (particle size 0.05‐0.07 mm) are employed. The spectra are analyzed by means of Univem MS software. The magnetic susceptibility is determined on a Kappabridge KLY-2 instrument (field strength 300 A/m) and the pH on a PH-340 instrument. To elucidate the spread in the sample composition prior to averaging, each component square for one of the points (at a distance of 400 m) is analyzed separately by Mossbauer spectroscopy and magnetometric measurement. The similarity of the characteristics justifies combination of the components. X-ray fluorescent analysis 1 of soil samples taken in the direction of intense wind dispersal at a distance of 100 m shows that the content of some elements (As, Pb, Cu, Zn) significantly exceeds the maximum permitted concentration. Their concentration is plotted as a function of the distance from the plant in Fig. 1, where the horizontal line corresponds to the maximum permitted concentration. Analysis indicates that the As concentration in the samples at a distance of 100 m exceeds the maximum permitted concentration by an order of magnitude; for copper and zinc, this factor is even greater. The Pb concentration is four times the maximum permitted concentration. At 400 m, by contrast, the concentration of these elements is less by a factor of 3‐5. The curves obtained are of the same shape: the concentration declines with distance. This indicates that the pollution source is the plant, and dispersion is by the wind. The proximity of the Orlov highway may also be response for some elevation of the Pb content. By extending the curves until they intersect the maximum permitted concentration, we may estimate the boundary of the corresponding pollution zone. Analysis shows
Databáze: OpenAIRE
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