Pollution characteristics and sources of environmentally persistent free radicals and oxidation potential in fine particulate matter related to city lockdown (CLD) in Xi'an, China.

Environ Res · 2022 · PMC9558116 · PMID 35176313

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a decreasing trendno p-value reported

Conversely, in the case of coal combustion attributed to DTTv, a decreasing trend was observed in 2020 (42.49%) as compared to 2019 (57.16%), and further reduced during CLD (29.02%).

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