CHARACTERISTICS AND INFLUENCING FACTORS OF ATMOSPHERIC NH<sub>3</sub> POLLUTION IN SHIHEZI

HE Kaijie; HE Youjiang; YANG Xin; CHENG Miaomiao; LI Fuqiang; PENG Yujie; LI Bin

doi:10.13205/j.hjgc.202407018

Volume 42 Issue 7

Jul. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(7): 162-170

HE Kaijie, HE Youjiang, YANG Xin, CHENG Miaomiao, LI Fuqiang, PENG Yujie, LI Bin. CHARACTERISTICS AND INFLUENCING FACTORS OF ATMOSPHERIC NH3 POLLUTION IN SHIHEZI[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 162-170. doi: 10.13205/j.hjgc.202407018

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HE Kaijie, HE Youjiang, YANG Xin, CHENG Miaomiao, LI Fuqiang, PENG Yujie, LI Bin. CHARACTERISTICS AND INFLUENCING FACTORS OF ATMOSPHERIC NH₃ POLLUTION IN SHIHEZI[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(7): 162-170. doi: 10.13205/j.hjgc.202407018

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CHARACTERISTICS AND INFLUENCING FACTORS OF ATMOSPHERIC NH₃ POLLUTION IN SHIHEZI

doi: 10.13205/j.hjgc.202407018

1. Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. School of the Environment and Safety Engineering, North University of China, Taiyuan 030051, China;
3. Shihezi Ecological and Environmental Monitoring Station, Shihezi 832099, China

Received Date: 2023-05-15
Available Online: 2024-12-02

Abstract

Abstract

Atmospheric ammonia (NH₃) has an important impact on the formation of secondary aerosols. To investigate the characteristics of atmospheric NH₃ pollution in Shihezi, the atmospheric NH₃ concentration was observed continuously from December 2020 to November 2021, and the magnitude level, variation characteristics, and influencing factors of atmospheric NH₃ in Shihezi were analyzed, in combination with the characteristics of atmospheric NH₃ emissions and the characteristics of concurrent meteorological parameters. The results show that the annual average concentration of atmospheric NH₃ in Shihezi was 21.0 μg/m³, the average concentration of atmospheric NH₃ in the four seasons ranged from 20.2 μg/m³ to 21.7 μg/m³, with a small seasonal fluctuation. In winter, the main source of atmospheric NH₃ in Shihezi was the escape of ammonia during the industrial flue gas denitrification process, and the continuous low boundary layer height and low wind speed in winter led to the deterioration of atmospheric diffusion conditions. The unfavorable diffusion conditions were an important reason for the accumulation of atmospheric NH₃ concentration in winter. Increasing the control of ammonia escape during flue gas denitrification was beneficial to reducing the atmospheric NH₃ concentration in Shihezi. The diurnal variation of atmospheric NH₃ concentration showed a pattern of higher during the day and lower at night in Shihezi in all seasons, with the daily variation of atmospheric NH₃ concentration being highest in spring and lowest in winter. The atmospheric NH₃ concentrations in spring and winter showed a single-peak pattern, with dual peaks at 12:00 and 16:00, respectively, and summer and autumn atmospheric NH₃ concentrations showed a multi-peak pattern, with maximum peaks at 11:00 and 13:00, respectively. Compared with other cities in China, the daytime peak of atmospheric NH₃ concentration in Shihezi appeared 1 to 3 hours later. The quantitative evaluation of the influencing factors of atmospheric NH₃ concentration by the random forest algorithm showed that the influence of meteorological factors on atmospheric NH₃ in the four seasons reached 63.6%, 58.8%, 73.9%, and 64.5%, respectively, and meteorological factors were the main influencing factors of atmospheric NH₃ concentration.
- NH₃,
- pollution characteristics,
- influencing factors,
- Shihezi

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References(59)

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