Environmental surveillance of the health risk of PM<sub>2.5</sub>-bound metals and metalloids in Wuxi, China, from 2020 to 2023.

The concentrations of Co, Sr., Cu, Fe, Rb, Tl, Zn, Cd, Al, Ba, V, Se, and Mn in PM 2.5 showed a decreasing trend to varying degrees, as analyzed by Scheffe’s test or the Kruskal Wallis H test, as Co showed the largest reduction in concentration, followed by Sr. and Cu This trend was consistent with the decline in PM 2.5 , as positive correlations were observed between PM 2.5 -bound metals and metalloids and PM 2.5 in Wuxi.

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