Comparative characteristics of emissions priority carcinogens by stationary sources into the air atmosphere of areas of the Ryazan region

Abstract

Aim. Evaluation of dynamics of emission of priority carcinogens by stationary sources in the regions of the Ryazan region in 2009 and 2016.

Materials and Methods. For analysis, official statistical data about volumes of pollutants emitted by stationary sources into the atmospheric air, were used. The priority was determined by calculation of equivalent emission with taking into account the slope factor of carcinogenic potential in inhalation entry (SFi). The dynamics of emissions of carcinogens was evaluated by the growth rate.

Results. The study showed that priority chemical carcinogens released into the atmospheric air of municipal units by stationary sources included: chromium (Cr) (VI), carbon (soot), benzol, petrol and formaldehyde. From 2009 to 2016 a 39.4% decline in the total equivalent emission of carcinogens was reported, especially of benzol, soot and formaldehyde which considerably changed the structure of emission – a significant increase in the share of Cr (VI) (up to 55.7%, 1.5-fold) and almost twice reduction in the share of benzol (to 23.3%). In the reported years more than 90% of the total equivalent emission of carcinogens in the Ryazan district were formed by stationary sources of Ryazan and Skopin towns, of Ryazan and Skopin districts.

Conclusion. In most municipal units of the Ryazan district a reduction of the total equivalent emission was noted except in Aleksandro-Nevsky, Miloslavskoye, Pronsk, Zakharovo and Shilovo districts where emission increased. In Ryazan, against the background significant reduction of emission of soot and benzol by 81.7 and 69.4%, respectively, a 37.4% increase in the emission of formaldehyde into the atmosphere was recorded.

Keywords

atmospheric air / emissions / stationary sources / carcinogens

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RIGHTS & PERMISSIONS

Dementyev A.A., Lyapkalo A.A., Tsurgan A.M., Bulychova G.N., Korshunova E.P.