The association of chemical composition particularly the heavy metals with the oxidative potential of ambient PM2.5 in a megacity (Guangzhou) of southern China

Measurement report: Oxidation potential of water-soluble aerosol components in the southern and northern of Beijing

“…Figure 2 shows the comparison of DTTv and DTTm values measured in this study with those measured in other regions of Asia during similar periods. It can be seen that the DTTv values measured in Beijing (Campbell et al, 2021;Oh et al, 2023;this study) were lower than that in Jinzhou, Tianjin, Yantai, and Shanghai in China, Lahore and Peshawar in Pakistan, and Delhi in India (Liu et al, 2018;Ahmad et al, 2021;Puthussery et al, 2022;Wu et al, 2022a), higher than that in Xi'an, Nanjing, Hangzhou, Guangzhou, and Shenzhen in China, and Gwangju in Korea (Wang et al, 2019;Wang et al, 2020b;Ma et al, 2021;Yu et al, 2022c;Oh et al, 2023;Xing et al, 2023), and comparable with that in Ningbo, China (Chen et al, 2022). Different from DTTv, the DTTm value measured in NCNT in Beijing was similar with that in Jinzhou, Tianjin, Yantai, Shanghai and Ningbo in China (Liu et al, 2018;Chen et al, 2022;Wu et al, 2022a), and higher than that in other regions.…”

Indoor and Personal PM2.5 Samples Differ in Chemical Composition and Alter Zebrafish Behavior Based on Primary Fuel Source

“…In fact, evidence suggests that other factors are better predictors of human health implications, including elemental and polycyclic aromatic hydrocarbon (PAH) composition and oxidative potential. − Health impacts of PM 2.5 are often partially attributed to PAHs content because of their well-known carcinogenic and mutagenic actions . Additionally, there is strong evidence that suggests that oxidative stress plays a role in PM 2.5 toxicity, since PM 2.5 often contains chemical constituents with the ability to induce oxidative stress. , These chemical constituents’ oxidative stress may differ depending on the type of fuel burned, therefore leading to varying degrees of oxidative stress and health impacts, depending on fuel type.…”

“…19 Additionally, there is strong evidence that suggests that oxidative stress plays a role in PM 2.5 toxicity, since PM 2.5 often contains chemical constituents with the ability to induce oxidative stress. 20,21 These chemical constituents' oxidative stress may differ depending on the type of fuel burned, therefore leading to varying degrees of oxidative stress and health impacts, depending on fuel type.…”