Understanding the industrial NOx and SO2 pollutant emissions in China from sector linkage perspective

Zhang, Lanxin; Wang, Yuan; Feng, Cuiyang; Liang, Sai; Liu, Yu; Du, Huibin; Jia, Ning

doi:10.1016/j.scitotenv.2021.145242

Cited by 40 publications

(15 citation statements)

References 41 publications

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“…However, owing to the lack of regulation regarding NH 3 emissions, NH 3 emissions increased by ∼ 30 % from 2008-2016 over the North China Plain (Liu et al, 2018). As has been pointed out in previous research, the promoting effect of NH 3 on the formation of SOA may counteract the decreases in aerosol formation due to reductions in SO 2 and NO x (Zhang et al, 2021a). Indeed, field observation and model simulation have pointed out that the simultaneous control of NH 3 emissions in conjunction with SO 2 emission is more effective in reducing PM 2.5 than the process without NH 3 emissions control, and PM 2.5 concentration can be more effectively reduced if NH 3 emission is decreased as much as that of SO 2 (Erisman and Schaap, 2004).…”

Section: Introductionmentioning

confidence: 84%

Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

et al. 2021

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Abstract. NH3 is the most important alkaline gas in the atmosphere and one of the key species affecting the behaviors of atmospheric aerosols. However, the impact of NH3 on secondary organic aerosol (SOA) formation remains poorly understood, especially the dynamic evolution of chemical compositions in the SOA formation process. In this study, a series of chamber experiments were performed to probe the individual and common effects of NH3 and NOx on toluene SOA formation through OH photooxidation. The chemical compositions of toluene SOA were characterized using the Aerodyne high-resolution time-of-flight aerosol mass spectrometer (AMS). The SOA yield increased from 28.1 % in the absence of NH3 to 34.7 % in the presence of NH3 but decreased to 19.5 % in the presence of NOx. However, the highest SOA yield of 42.7 % and the lowest carbon oxidation state (OSC) occurred in the presence of both NH3 and NOx, indicating that the higher-volatility products that formed in the presence of NOx could partition into the particle phase when NH3 was added. This resulted in a synergetic effect on SOA formation when NH3 and NOx co-existed. The heterogeneous reaction was the main pathway by which NH3 participated in SOA formation in the photooxidation process. The synergetic effect of NH3 and NOx was also observed in SOA optical absorption. A peak at 280 nm, which is characteristic of organonitrogen imidazole compounds, was observed in the presence of NH3, and its intensity increased when NOx was added into the chamber. This work improves our understanding of how the synergistic interactions between NH3 and NOx influence SOA formation and offers new insights into mitigating haze pollution.

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Section: Introductionmentioning

confidence: 84%

Synergetic effects of NH3 and NOx on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

et al. 2021

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“…Owing to the lack of regulation regarding NH3 emissions, NH3 emissions increased by ∼30 % from 2008-2016 over the North China Plain (Liu et al, 2018). As has been pointed out in previous research, the effect of NH3 on the formation of SOA is one of gradual enhancement and may counteract any decreases in SOA formation due to reductions in SO2 and NOx (Zhang et al, 2021). Indeed, one study observed that a reduction of NH3 emissions improved PM2.5 pollution compared to SO2 in winter (Erisman and Schaap, 2004).…”

Section: Introductionmentioning

confidence: 85%

Reviewer comment on acp-2021-560

2021

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“…Since 2013, the fluctuation disappeared. This is attributed to the fact that, under the call of national policies [39][40][41], Weifang city adhered to the principle of absolute priority for ecology, organized and implemented the "386" environmental protection action, and took law enforcement and supervision as the guarantee. The strict emission reduction measures adopted by Weifang city included the elimination of polluting vehicles, the elimination of small coal-fired boilers, the installation of exhaust gas monitoring equipment, the delineation of combustion zones, the closure of polluting enterprises, and the prohibition of the burning of straw, etc.…”

Section: The Regression Modelmentioning

confidence: 99%

Spatio-Temporal Characteristics of SO2 across Weifang from 2008 to 2020

Zhu

Zhang

2021

IJERPH

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China has achieved good results in SO2 pollution control, but SO2 pollution still exists in some areas. Analyzing the spatio-temporal distribution of SO2 is critical for regional SO2 pollution prevention and control. Compared with existing air pollution studies that paid more attention to PM2.5, NO2 and O3, and focused on the macro scale, this study took the small-scale Weifang city as the research area, analyzed the temporal and spatial changes in SO2, discussed the migration trajectory of SO2 pollution and explored the impact of wind on SO2 pollution. The results show that the average annual concentration of SO2 in Weifang has exhibited a downward trend in the past 13 years, showing the basic characteristics of “highest in winter, lowest in summer and slightly higher in spring and autumn”, “highest on Sunday, lowest on Thursday and gradually decreasing from Monday to Thursday” and “highest at 9 a.m., lowest at 4 p.m. and gradually increasing from midnight to 9 a.m.”. SO2 concentration showed obvious spatial heterogeneity: higher in the north and lower in the south. In addition, Shouguang, Changyi and Gaomi were seriously polluted. The SO2 pollution shifted from south to northeast. The clean wind direction (southeast wind and northeast wind) of Weifang city accounted for about 41%, and the pollution wind direction (northwest wind and west wind) accounted for about 7%. Drawing from the multi-scale analysis, vegetation, precipitation, temperature, transport situation and human activity were the most relevant factors. Limited to data collection, more quantitative research is needed to gain insight into the influence mechanism in the future.

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Understanding the industrial NOx and SO2 pollutant emissions in China from sector linkage perspective

Cited by 40 publications

References 41 publications

Synergetic effects of NH<sub>3</sub> and NO<sub><i>x</i></sub> on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

Synergetic effects of NH<sub>3</sub> and NO<sub><i>x</i></sub> on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

Reviewer comment on acp-2021-560

Spatio-Temporal Characteristics of SO2 across Weifang from 2008 to 2020

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Understanding the industrial NOx and SO2 pollutant emissions in China from sector linkage perspective

Cited by 40 publications

References 41 publications

Synergetic effects of NH&lt;sub&gt;3&lt;/sub&gt; and NO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

Synergetic effects of NH&lt;sub&gt;3&lt;/sub&gt; and NO&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt; on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

Reviewer comment on acp-2021-560

Spatio-Temporal Characteristics of SO2 across Weifang from 2008 to 2020

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Synergetic effects of NH<sub>3</sub> and NO<sub><i>x</i></sub> on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation

Synergetic effects of NH<sub>3</sub> and NO<sub><i>x</i></sub> on the production and optical absorption of secondary organic aerosol formation from toluene photooxidation