Abstract:
The spatial-temporal variability of ammonia in the atmosphere over representative agricultural region in Beijing during 2015 was monitored. The results showed that the livestock farm and fertilizer factory are both the most important ammonia sources in agricultural region, with the highest ammonia concentrations reaching 3.52 and 4.27 mg/m
3 at the downwind of the fence line, respectively. The ammonia concentrations at agricultural region presented significant difference between seasons as well as day and night, which were higher in summer and autumn, and lower in winter and spring, meanwhile higher at afternoon and lower at night. During the daytime, the ammonia concentrations present descending order at fertilizer factory, livestock farm, cropland, avenue, residential district, and forest land. At night, the ammonia concentrations were still high at fertilizer factory and livestock farm, but the affected scope was significantly reduced, while the ammonia concentrations obviously decreased at cropland, residential district, and avenue. The ammonia concentrations at residential district in the agricultural region were much lower than the
Emission Standards for Odor Pollutants, and would not affect human health.