(주)에이피엠엔지니어링

전라북도 논밭지역 계절별 암모니아 농도 및 암모늄과의 관계

Seasonal Measurement of Ammonia Concentration and its Relationship with Ammonium in the Field Areas of Jeollabuk-do

Abstract 

This study investigated the relationships between secondary inorganic aerosols in PM2.5 and precursor gases emitted from active agricultural areas over a period of one year, from June 1, 2022, to May 31, 2023, in Rice (Buan) and Fields (Gochang) in the Jeollabukdo Region simultaneously. In addition, the study examined the particle-phase conversion rates of gaseous precursor compounds to elucidate factors influencing the chemical characteristics of PM2.5. The high NH3 concentration in the early morning, assuming constant soil emission, suggested a significant influence from surrounding environmental conditions. In Buan and Gochang, NO3 - predominantly existed in particle form during cold winter temperatures, while in hot summer temperatures, it mainly existed in the gas phase, demonstrating distinct seasonal behavior. Furthermore, NO3 - was influenced by localized generation due to regional primary emissions. The study results indicate that the formation of NO3 - in Buan and Gochang is primarily governed by NH4 + originating from regional soil-emitted NH3. These findings can serve as crucial foundational data for elucidating the seasonal concentrations of precursor gases, including NH3, emitted to agricultural regions. 

Key words

NH3, NOR, NHR, Secondary formation

▶출처 : 한국대기환경학회지 제 39권 제 6 호, 2023.12