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- W4385340300 abstract "Abstract This study investigates the concentrations and spatial distribution of toxic heavy metals (Cd, Cu, Pb and Zn) through chemical analysis of rainwater samples, characterized by different land use, emission sources, traffic conditions and population density. The average concentrations at the five sites were 52.9, 11.8, 14.6 and 0.93 µg l − 1 for Zn, Pb, Cu and Cd, respectively. The concentrations for all heavy metals were significantly higher ( p < 0.05) at the central and south Tehran areas compared to the west and north, due to different urban characteristics, higher pollution emission rates from traffic and domestic sectors, and local winds patterns developed within the city. High traffic load in the central part of Tehran also escalates the heavy metal concentrations in this region. The significant correlations between the studied heavy metals at the five sites indicate common, local anthropogenic sources. The heavy metal concentrations were higher in spring than in winter, likely associated with dilution processes in winter and the restriction measures due to COVID-19 pandemic. During the lockdown period, a drastic decrease in traffic load was observed in Tehran, confirming that motor vehicles is the main regulatory factor for air pollution and potential toxic elements in the city." @default.
- W4385340300 created "2023-07-29" @default.
- W4385340300 creator A5020069062 @default.
- W4385340300 creator A5050740993 @default.
- W4385340300 creator A5082998874 @default.
- W4385340300 creator A5092559426 @default.
- W4385340300 date "2023-07-28" @default.
- W4385340300 modified "2023-09-24" @default.
- W4385340300 title "Toxic heavy metals in rainwater samples of Tehran" @default.
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