Isotopic signatures suggest important contributions from recycled gasoline, road dust and non-exhaust traffic sources for copper, zinc and lead in PM10 in London, United Kingdom
作者： Shuofei Dong , Raquel Ochoa Gonzalez , Roy M. Harrison , David Green , Robin North
DOI: 10.1016/J.ATMOSENV.2017.06.020
关键词: Gasoline 、 Air pollution 、 Mineralogy 、 Stable isotope ratio 、 Copper 、 Particulates 、 Chemistry 、 Zinc 、 Trace element 、 Isotope
摘要: Abstract The aim of this study was to improve our understanding what controls the isotope composition Cu, Zn and Pb in particulate matter (PM) urban environment develop these systems as possible source tracers. To end, ratios (Cu, Pb) trace element concentrations (Fe, Al, Zn, Sb, Ba, Pb, Cr, Ni V) were determined PM 10 collected at two road sites with contrasting traffic densities central London, UK, during weeks summer 2010, potential sources, including non-combustion emissions (tires brakes), furniture (road paint, manhole cover tarmac surface) dust. Iron, Ba Sb used proxies for derived from brake pads, Ni, V fossil fuel oil. isotopic (expressed using 206 Pb/ 207 ranged between 1.1137 1.1364. Cu expressed δ 65 NIST976 66 Lyon between −0.01‰ and +0.51‰ between −0.21‰ and +0.33‰, respectively. We did not find significant differences signatures over sampling period sites, suggesting similar sources each metal both despite their different densities. stable suggests contribution dust resuspension recycled leaded gasoline. tires, brakes overlap those . correlation enrichments Fe support previously established hypothesis that are controlled by non-exhaust emission environments (Ochoa Gonzalez et al., 2016). Analysis tire wear. However, temporary additional likely high temperature industrial emissions, need be invoked explain isotopically light found 3 out 18 samples
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