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Fine particulate matter (PM2.5) is recognized as the most harmful air pollutant in Europe. The PM2.5 toxic effect is not only due to its size but also to its chemical composition. Black Carbon (BC) is one of the components of the PM2.5 that affects both human health and contributes to climate change [1-3]. It is emitted by the incomplete combustion of fossil fuels, biofuels, and biomass. There are no regular measurements of the BC concentrations in Bulgaria. This work presents new results from parallel field campa...

The southern part of the Bulgarian Black Sea coast is characterized by numerous nature protected areas with high biodiversity, picturesque seashore landscapes and small villages that attract many tourists in summer. Despite the fact that the region is distant to big emission sources of anthropogenic pollution, air pollution and deposition can be significant for specific pollutants and seasons [1-2]. The main goal is to discuss recent data for dry depositions of oxidized nitrogen, reduced nitrogen and sulphur for t...

The atmosphere is one of the environmental components, which living organisms utilize the most. However, in large urban agglomerations, the air often contains substances that can be dangerous to human health and ecosystems, especially if their concentrations exceed the legal norms. Although the mechanism of impact of the individual chemical compounds (SO2, NO2, O3, benzene, etc.), considered as pollutants is well known, it is still a challenge to clarify the composition and impact of the particulate matters, espec...

Precipitation chemistry has been intensively studied worldwide mainly due to acid deposition, eutrophication, trace metal deposition, damages to forests and vegetation, ecosystem health, and global climate change [1]. The objective of this study is to investigate the relationship between precipitation pH and wind direction for the period of five years (2015-2019) at coast Hydrometeorology station Ahtopol. The pH of bulk precipitation samples, as well as the wind direction are measured in the main synoptic terms (0...