Comparison of PM2.5 Chemical Compositions during Haze and Non-haze Days in a Heavy Industrial City in North China

Li, Menghui; Wu, Liping; Zhang, Xiangyan; Wang, Xinwu; Bai, Wen-Yu; Ming, Jing; Geng, Chunmei; Yang, Wen

doi:10.4209/aaqr.2019.11.0591

Cited by 6 publications

(3 citation statements)

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“…The annual mean WSII concentrations of PM 2.5 at the urban and suburban sites (Table 4) were 42.2 ± 35.0 and 44.0 ± 31.3 µg/m 3 , accounting for 50 ± 8% and 56 ± 11% of the total PM 2.5 , respectively, which is close to the results for 2018 [27]. This result shows that WSIIs were the main components of PM 2.5 in both urban and suburban areas.…”

Section: Wsii Levelssupporting

confidence: 79%

“…The difference between two consecutive measurements was not more than 40 µg. After sampling, the filters were stored at −20 • C until analysis to prevent volatilization of volatile components [27]. The concentrations of PM 2.5 were determined based on the values analysed from the Teflon filters.…”

Section: Gravimetric and Sample Analysismentioning

confidence: 99%

“…There was a typical haze episode from 10 to 14 January 2019 in Zibo according to the definition of haze episode [27]; Figure 3 gives the daily concentrations of PM 2.5 , SNA, and NO 3 − /SO 4 2− during this episode. The average concentrations of PM 2.5 were 197 µg/m 3 and 180 µg/m 3 at the urban and suburban sites, respectively, and the peak values were 312 and 212 µg/m 3 , respectively.…”

Section: Wsii Levelsmentioning

confidence: 99%

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Characteristics of PM2.5 in an Industrial City of Northern China: Mass Concentrations, Chemical Composition, Source Apportionment, and Health Risk Assessment

Bai

Zhao

Yin

et al. 2022

IJERPH

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Urban and suburban PM2.5 samples were collected simultaneously during selected periods representing each season in 2019 in Zibo, China. Samples were analysed for water-soluble inorganic ions, carbon components, and elements. A chemical mass balance model and health risk assessment model were used to investigate the source contributions to PM2.5 and the human health risks posed by various pollution sources via the inhalation pathway. Almost 50% of the PM2.5 samples exceeded the secondary standard of China’s air quality concentration limit (75 µg/m3, 24 h). Water-soluble inorganic ions were the main component of PM2.5 in Zibo, accounting for 50 ± 8% and 56 ± 11% of PM2.5 at the urban and suburban sites, respectively. OC and OC/EC decreased significantly in the past few years due to enhanced energy restructuring. Pearson correlation analysis showed that traffic emissions were the main source of heavy metals. The Cr(VI) concentrations were 1.53 and 1.92 ng/m3 for urban and suburban sites, respectively, exceeding the national ambient air quality standards limit of 0.025 ng/m3. Secondary inorganic aerosols, traffic emissions, and secondary organic aerosols were the dominant contributors to PM2.5 in Zibo, with the total contributions from these three sources accounting for approximately 80% of PM2.5 and the remaining 20% attributed to traffic emissions. The non-carcinogenic risks from crustal dust for children were 2.23 and 1.15 in urban and suburban areas, respectively, exceeding the safe limit of 1.0 in both locations, as was the case for adults in urban areas. Meanwhile, the carcinogenic risks were all below the safe limit, with the non-carcinogenic and carcinogenic risks from traffic emissions being just below the limits. Strict control of precursor emissions, such as SO2, NOx, and VOCs, is a good way to reduce PM2.5 pollution resulting from secondary aerosols. Traffic control, limiting or preventing outdoor activities, and wearing masks during haze episodes may be also helpful in reducing PM2.5 pollution and its non-carcinogenic and carcinogenic health impacts in Zibo.

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Section: Wsii Levelssupporting

confidence: 79%

Section: Gravimetric and Sample Analysismentioning

confidence: 99%

Section: Wsii Levelsmentioning

confidence: 99%

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