Studium výskytu vybraných plynných látek na ostravských termicky aktivních uhelných odvalech.

Abstract

A number of coal mine waste heaps were piled in connection with black coal mining in the Ostrava city. Because coal substance could not have been completely cleaned from the waste rock, spontaneous ignition of the heaps often occurred. Some of the heaps have been thermally active to date. The thermally active heaps pollute the air by gaseous emissions formed by organic and inorganic substances. The research within the doctoral thesis deals with selected thermally active heaps, namely the Ema heap that has a soil cover, and the Heřmanice heap that is without soil cover. The doctoral thesis comprises the measurements of gaseous substances produced by the thermally active heaps Ema and Heřmanice in the period from January 2016 to January 2017. SO2 was measured by two different methods using the indicator of thorin and methylsulfonazo III. Next, CO2 measurements were performed using the NDIR analyser and measurement of CH4, C3H8 and H2 using a semiconductor analyser. From the selected substances, the dominant compound in the gaseous samples on the Ema heap was CO2, the concentrations of which ranged from 1 079 to 13 272 mg m-3. On the Heřmanice heap CH4 was dominant, the concentration of which ranged from 2 899 to 26 478 mg m-3. Within the research, I also monitored the temperature of the gas leaking from the heap in the sampling sites of gaseous substances, which is directly proportional to the intensity of the running thermal processes. In Ema heap it ranged from 291.06 to 303.42 K and in Heřmanice heap it ranged from 324.96 - 334.64 K.