Characteristics and Health Risks of Trace Metals in PM_2.5 Before and During the Heating Period over Three Years in Shijiazhuang, China.

ABSTRACT: To explore the characteristics of PM_2.5 and assess the health risks to residents in Shijiazhuang before and during the heating period in 2019, 2020 and 2021, the hourly concentrations of PM_2.5 and its nine selected trace elements were determined. The results showed that the mass concentrations of PM_2.5 were 80.32 ± 50.21 μg m^-3 (2019), 69.97 ± 41.91 μg m^-3 (2020) and 58.70 ± 41.97 μg m^-3 (2021) during the heating period, representing greatly improved air quality. The PM_2.5 levels in the heating period were 1.04~1.60 times greater than those before the heating period, while the total selected trace element concentrations were about 1.44~1.97 times higher, indicating that strict control for PM_2.5 in the h

SUBMITTER: Ma Q 

PROVIDER: S-EPMC12031353 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature