Nitrous acid emission from soil bacteria and related environmental effect over the North China Plain

Feng，Tian1,2; Zhao，Shuyu3; Liu，Lang3; Long，Xin4; Gao，Chao1; Wu，Naicheng1

2022

10.1016/j.chemosphere.2021.132034

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

Soil bacteria could be one of the important sources for ambient HONO. However, the HONO emission from soil bacteria over North China Plain (NCP) with vast croplands has not yet been evaluated. In this study, high-resolution simulations are created to explore the HONO emission from soil bacteria over NCP and related influences on atmospheric chemistry. Ground measurements of critical air pollutants including O, HONO, and PM compositions are incorporated to constrain the model simulations. Results show that abundant HONO is emitted from soil bacteria over NCP during summertime and the emission rate varies dramatically for different areas (about 0.2 kg km d - 2.0 kg km d). The HONO emission rate presents clear diurnal cycles with peaks of 1.5 kg km d in the afternoon and valleys of 0.4 kg km d during the early morning hours. The resulting HONO concentration ranges from 0.2 μg m to 1.4 μg m, which predominates the total HONO concentration in ambient air, particularly in western NCP. The soil bacteria source can significantly alter the diurnal cycles of ambient HONO and OH concentrations over NCP, but only slightly change O and PM concentrations via participating photochemistry and secondary aerosol formations. These results highlight the pressing need for the involvement of HONO emission from soil bacteria in modeling studies regarding atmospheric chemistry, particularly in rural areas.

Air quality Cropland Nitrous acid Soil bacteria

SCI ; EI

英语

其他

WOS:000704979500003

20213610860576

Air quality ; Atmospheric chemistry ; Bacteria ; Inorganic acids

Atmospheric Properties:443.1 ; Air Pollution Control:451.2 ; Soils and Soil Mechanics:483.1 ; Chemistry, General:801.1 ; Inorganic Compounds:804.2

ENVIRONMENT/ECOLOGY

2-s2.0-85114137642

Scopus

1.Department of Geography & Spatial Information Techniques,Ningbo University,Ningbo,315211,China
2.Institute of East China Sea,Ningbo University,Ningbo,315211,China
3.Key Lab of Aerosol Chemistry and Physics,SKLLQG,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an,710061,China
4.School of Environmental Science & Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Feng，Tian,Zhao，Shuyu,Liu，Lang,et al. Nitrous acid emission from soil bacteria and related environmental effect over the North China Plain[J]. CHEMOSPHERE,2022,287.

Feng，Tian,Zhao，Shuyu,Liu，Lang,Long，Xin,Gao，Chao,&Wu，Naicheng.(2022).Nitrous acid emission from soil bacteria and related environmental effect over the North China Plain.CHEMOSPHERE,287.

Feng，Tian,et al."Nitrous acid emission from soil bacteria and related environmental effect over the North China Plain".CHEMOSPHERE 287(2022).