| Popis: | We encounter smoke relatively regularly in our lives. Smoke consists of gaseous, liquid and solid components that are formed by combustion / oxidation of fuel. The chemical composition of smoke depends not only on the fuel used, but on a number of other parameters (operation, technology, atmospheric influences). So the chemical composition of smoke is variable and cannot be easily characterized. In addition to unconsumed air, wood, CO2, methane, volatile organic compounds, trace elements and ultrafine particles are released into the atmosphere when wood is burned. Measurements for a given type of combustion technology with a specific type of fuel are published on this topic. The procedure of our measurement of the concentration of nanoparticles (10-700 nm) in wood smoke and their mean diameters can be called "terrain". The aim of these measurements in real situations was to find and describe the sources of increased nanoparticle concentration. Substantial quantitative information on the occurrence of nanoparticles during wood burning in various types of heaters was obtained in the field in real climatic conditions, typical for the winter period in Central Europe, when it is most heated in households. Wood burning in households in predominantly agricultural areas of the Czech Republic can thus be considered the main source of outdoor air pollution, but it can also have a significant effect on the deterioration of indoor air quality. At the same time, it can be assumed that the negative impact of nanoparticles on human health in areas polluted by wood smoke is weaker than the impact elsewhere - in industrial, more polluted areas. |
