Abstract
The represented research aims to assess the pollution of agricultural ecosystems with benzo(a)pyrene. The study considers the exhaust gases of heavy farming machinery as a primary source of pollution. This dangerous carcinogen entering air with internal combustion engines exhausts goes to the water and soil, and then, through the trophic chains, in a human body. Alongside the obvious negative impacts on human health, the benzo(a)pyrene exposure manifests through the decline in the agricultural ecosystems’ productivity, soil fertility, etc. The assessment was implemented on a wheat field model during harvest using the direct combining method. The model doesn’t consider the ambient pollution sources. The performed simulations allow disclosing the correlations between the harvesting machine’s velocity and pollutant’s emission mass on the model field, identifying the most environmentally dangerous engine’s operation mode, and pointing out the possible ways to decrease the benzo(a)pyrene impacts on agricultural ecosystems.
Highlights
The rapid growth and development of the technosphere result in an annual decrease in territories that are not affected by anthropogenic influence
In the thresholds of the examined velocity range, the C20H12 emissions differ by about seven times
The performed research recognizes the emissions of heavy farming equipment and the transport moving along the nearby highways as the primary sources of benzo(a)pyrene pollution of agroecosystems
Summary
The rapid growth and development of the technosphere result in an annual decrease in territories that are not affected by anthropogenic influence. Pollutants, which are byproducts of almost any economic branches [1,2,3,4], enter the environment and into the human body through the respiratory organs or digestive tract, causing various pathologies and lesions [5, 6]. The 3,4-benzo(a)pyrene (C20H12) is one of the most dangerous pollutants entering ecosystems, both natural and technogenic ways. It has a carcinogenic, mutagenic, embryotoxic, and hematotoxic effect on living organisms [7]. And chemically stable molecules of benzo(a)pyrene enter the body through the respiratory and digestive systems and accumulate in cells, penetrating the DNA structure and causing irreversible mutations of the body and its descendants [8]
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