Seasonal concentration distribution of PM1.0 and PM2.5 and a risk assessment of bound trace metals in Harbin, China: Effect of the species distribution of heavy metals and heat supply.

Sci Rep · 2020 · PMC7235082 · PMID 32424213

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quite significantno p-value reported

Moreover, the difference between the maximum value and minimum value of the particle number, observed in the heat supply periods, is quite significant, whereas that in the period with no heat supply is not significant (42367 vs 6188).

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