Volatile fatty acid evolution in biomass mixture composts prepared in open and closed bioreactors
In: Waste management: international journal of integrated waste management, science and technology, Band 33, Heft 5, S. 1104-1112
ISSN: 1879-2456
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In: Waste management: international journal of integrated waste management, science and technology, Band 33, Heft 5, S. 1104-1112
ISSN: 1879-2456
In: Environmental science and pollution research: ESPR
ISSN: 1614-7499
AbstractThis study investigates the vertical distribution of pollutants emitted from coal yards using unmanned aerial vehicles (UAVs). Vertical concentration measurements of black carbon (BC) and particulate matter (PM) in a range of 1 m to 100 m above ground level (AGL) in the central coal yard showed clear spatial patterns and gradients of these pollutants. In addition, measurements were taken at specific heights (1 m, 30 m AGL, and 60 m AGL) at seven locations approximately 3 km from the yard. Thirteen measurements were carried out during the non-heating period under similar weather conditions. The measured BC concentrations decreased significantly with increasing altitude, with ground-level concentrations reaching 1.88 ± 0.61 µg/m3 and decreasing by over 46% at 80 m AGL. Similarly, PM10 concentrations at 60 m AGL decreased by 21.7%, with values of 25.99 ± 9.24 µg/m3 measured near the ground level and 16.52 ± 8.31 µg/m3 at 60 m AGL. The maximum coal particle pollution from the coal depot ranges from 500 to 1,000 m. The study showed a significant decrease in BC concentrations with height above the coal yard surface. Concentrations of PM10 and PM10-TSP showed a complex distribution influenced by local emissions and long-range particle transport. Meteorological factors, especially wind speed and direction, significantly influenced the pollutant dispersion. In addition, higher pollutant concentrations were measured during dry periods than after rainfall. The findings of this study contribute to a better understanding of the dispersion patterns and potential impacts of coal dust, enabling the implementation of targeted mitigation strategies and improved pollution control measures.
In: Environmental science and pollution research: ESPR, Band 30, Heft 4, S. 8582-8600
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 30, Heft 4, S. 8563-8581
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 28, Heft 19, S. 24663-24679
ISSN: 1614-7499