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Personal exposure to PM10 of selected workplaces in a coal strip mine determined by experiment
Basslerová, Barbora ; Hovorka, Jan (advisor) ; Hůnová, Iva (referee)
This thesis compares the experimentally determinated values of PM1, PM2,5, respirable fraction and PM10 between the cab drivers and the outdoor walkway of the bucket wheel excavator in the brown coal strip mine Doly Nástup Tušimice between March 16 and March 23, 2015. For the measurement of individual fractions, portable laser nephelometers were used. Superiority of coarse aerosol was confirmed outside from the total measurement time accounted for 82 %. PM10 fraction predominated outside and changed throughout the day depending on the activity carried out by a worker. Regular cleaning by sweeping stretches of dunes had an impact on PM10 concentrations. Fluctuations in the concentration of PM1 were detected in the driver cab due to smokers stay at this workplace. For these reasons there is a concentration difference between work shifts. Air temperature and relative humidity were also monitored in both types of work places. The air temperature average values reached over the range recommended for the optimal working environment in the driver cab. The thesis finds out personal exposure of a bucket-wheel excavator driver which is below the limit for the total concentration. Smaller fractions appears to be a potentially health risk. Powered by TCPDF (www.tcpdf.org)
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Atmospheric aerosol vertical distribution in boudary layer
Dočekalová, Veronika ; Hovorka, Jan (advisor) ; Jančík, Petr (referee)
Particulate matter (PM) air pollution is one of the most important topics in the field of environmental protection, and coal strip mining is a significant source of coarse atmospheric aerosol. In order to implement appropriate regulations to improve air quality, we need to identify the major sources of pollution. PM is usually measured in a ground-based manner and its dispersion is only modelled. Therefore, the objective of this study was to measure concentrations of coarse aerosol in the atmospheric boundary layer above the area of the coal strip mine through experimental airborne measurements and to estimate pollution contribution of mining to the surroundings. Measurements were carried out from November 11 to November 26, 2012, at Vršany coal mine, Czech Republic. An electrically powered airship was used with a specially designed gondola carrying aerosol monitors DustTrak DRX and P-Trak. Temperature and relative humidity data were also recorded. Repeated flights were performed at several heights above mine edge level. PM1-10 and GPS data were recorded every second. Average airship velocity ranged from 6 to 7 ms-1 . Flight measurements were also compared to ground-based measurements of PM10 and meteorological data. Weather during our measurements was characterised by low temperatures, high relative...
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Atmospheric aerosol vertical distribution in boudary layer
Dočekalová, Veronika ; Hovorka, Jan (advisor) ; Jančík, Petr (referee)
Particulate matter (PM) air pollution is one of the most important topics in the field of environmental protection, and coal strip mining is a significant source of coarse atmospheric aerosol. In order to implement appropriate regulations to improve air quality, we need to identify the major sources of pollution. PM is usually measured in a ground-based manner and its dispersion is only modelled. Therefore, the objective of this study was to measure concentrations of coarse aerosol in the atmospheric boundary layer above the area of the coal strip mine through experimental airborne measurements and to estimate pollution contribution of mining to the surroundings. Measurements were carried out from November 11 to November 26, 2012, at Vršany coal mine, Czech Republic. An electrically powered airship was used with a specially designed gondola carrying aerosol monitors DustTrak DRX and P-Trak. Temperature and relative humidity data were also recorded. Repeated flights were performed at several heights above mine edge level. PM1-10 and GPS data were recorded every second. Average airship velocity ranged from 6 to 7 ms-1 . Flight measurements were also compared to ground-based measurements of PM10 and meteorological data. Weather during our measurements was characterised by low temperatures, high relative...
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Personal exposure to PM10 of selected workplaces in a coal strip mine determined by experiment
Basslerová, Barbora ; Hovorka, Jan (advisor) ; Hůnová, Iva (referee)
This thesis compares the experimentally determinated values of PM1, PM2,5, respirable fraction and PM10 between the cab drivers and the outdoor walkway of the bucket wheel excavator in the brown coal strip mine Doly Nástup Tušimice between March 16 and March 23, 2015. For the measurement of individual fractions, portable laser nephelometers were used. Superiority of coarse aerosol was confirmed outside from the total measurement time accounted for 82 %. PM10 fraction predominated outside and changed throughout the day depending on the activity carried out by a worker. Regular cleaning by sweeping stretches of dunes had an impact on PM10 concentrations. Fluctuations in the concentration of PM1 were detected in the driver cab due to smokers stay at this workplace. For these reasons there is a concentration difference between work shifts. Air temperature and relative humidity were also monitored in both types of work places. The air temperature average values reached over the range recommended for the optimal working environment in the driver cab. The thesis finds out personal exposure of a bucket-wheel excavator driver which is below the limit for the total concentration. Smaller fractions appears to be a potentially health risk. Powered by TCPDF (www.tcpdf.org)
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