Использование изотопной масс-спектрометрии для оценки масштабов эмиссии биогенного метана в атмосферу
The biogeochemical studies of bacterial methanogenesis and methane oxidation processes occurring at a dump of solid domestic waste (SDW) of the city of Kaluga have been performed. The dump contains about 1.357×106 tons of non-toxic domestic waste buried with successive application of sand-clay and waste layers. On the basis of quantitative and isotopic characteristics of the carbon from methane and carbon dioxide, it has been determined that about (3.33±1.31)×106 m3 of methane is released into the atmosphere each year at burial of wastes in the amount of 37.17×103 tons year –1 . The effi ciency of methane-oxidizing bacterial fi lter on the SDW ground with sand-clay layers is estimated as approximately 23 % of total methane production. After partial oxidation of biogenic methane by methanotrophic bacteria, isotopic composition of the carbon emitted into atmosphere is characterized by the value of δ13 С = –(45.6±2.5) ‰.
