Бодак І. В.

Purpose of the study is to determine spatial and temporal variability of PM2.5 air pollution level within urban geosystems with a high anthropogenic pressure (on the example of Kharkiv city). Methods. Open online monitoring platform «Air Pollution», PM2.5 level was measured with «7bit Pollution Monitor», statistical. Results. Monitoring of PM2.5 air pollution of Kharkiv was conducted from August 1, 2019 to April 1, 2020 at 6 control points in different districts of the city. Air Pollution open online monitoring platform served as a data source of 28,119 mass concentrations of PM2.5 in the air. Threshold concentrations, recommended by the WHO, were used to determine compliance with hygienic standards for fine dust of less than 2.5 μm. The PM2.5 air pollution level and its degree of threat to public health were assessed in accordance with the International Air Quality Index (AQI) scale. Fine particles pose the greatest health risk. Exceeding the PM2.5 threshold level set by the WHO was detected for 17.4% of studied cases (4,905 out of 28,119 studied cases). In general, according to the AQI scale, in the vast majority of cases, the content of PM2.5 in the air varies from low to moderate. The highest level of PM2.5 in the air was measured at point No. 1 at the address Aptekarskyi Lane 9, which may be due to its location in areas with high traffic. The daily, weekly and seasonal variability of PM2.5 content was de-termined. Seasonal and daily variations in the content PM2.5 of in the air of Kharkiv depend on changes in weather conditions (precipitation, wind speed, etc.), the level of traffic congestion and the operation mode of potential stationary pollution sources. Conclusions. The obtained results provide a basis for further study of the correlation of PM2.5 content in the air with the influence of various natural and socio-economic factors of the territory, as well as with the mortality rates.

The article is devoted to identification of peculiarities of heavy metals translocation as dominant anthropo-genic pollutants from raw fruit (apples) to treated products - fruit juices and compotes. The area of study covered urban geosystems within the following regions: Poltava, Kharkiv and Donetsk Oblasts. The following apple sorts were studied: Jonathan, White Transparent, Melba, Saffron summer and Starking.. On the basis of the research it was found that the content of Zn and Cu in apples and their products is within the MAC. It was identified that Cd concentration in apples is in 2-12,6 times higher than MAC; data for juices: fresh juice – Cd concentration is 2,3-7 MAC and in apple juice after thermal treatment - 1,3 5.3 MAC, in compote – 2 MAC. According to the total pollution index (У Cdg), raw fruit is the most contaminated with heavy metals (У Cdg = 2,3-13,4), followed by fresh juice (У Cdg = 2,5-7,5), juice after thermal treatment (У Cdg = 1,5-5,7) and compote (У Cdg = 2.0-2.2). Approximately 53% of the total metal content was found in apple peel, while the remaining 47% - in the flesh of apples. After the thermal treatment, almost all metal concentrations decreases: Cd content is reduced by an average of 50% (Ctr = 0.51; Ctr – transition coefficient) and other metals - by 25-35% (Ctr = 0,65-0,75). Heavy metal translocation from apple into compote is considerably lower. Thus, the content of Cd and Zn decreased on average by 70%, and Fe, Mn and Cu - 51-62%. Thermal treatment has a positive effect on reducing the concentrations of heavy metals in juice comparing to the original raw fruit.