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• W2907331208 endingPage "1671" @default.
• W2907331208 startingPage "1661" @default.
• W2907331208 abstract "We investigated the complexation state of atmospheric iron and copper and its impact on the oxidative potential (OP) of ambient PM2.5 (PM, particulate matter). A novel fractionation scheme was developed to segregate three different fractions of Fe and Cu present in ambient PM2.5: (i) complexed with hydrophobic organic compounds, (ii) complexed with hydrophilic organic compounds, and (iii) free or inorganic metal fraction. A solid phase extraction (C-18) column was used to separate these fractions. The fractionation scheme applied to the ambient PM2.5 samples collected from an urban site showed that up to 70-90% of water-soluble Fe and Cu were complexed with the organic compounds. The capability of the complexes of Fe(II) and Cu(II) with Suwanee river fulvic acid (SRFA), a proxy for the atmospheric organic compounds, to generate reactive oxygen species (ROS) (·OH and H2O2) in a surrogate lung fluid (SLF) was measured. The complex of Fe-SRFA showed a strong synergistic effect in the generation of ·OH in SLF, while that of Cu-SRFA showed an additive effect. Overall, our results indicate that organic complexation of the metals in ambient PM could significantly alter their OP and needs to be considered while assessing their health impacts." @default.
• W2907331208 created "2019-01-11" @default.
• W2907331208 creator A5006215854 @default.
• W2907331208 creator A5015866884 @default.
• W2907331208 creator A5029798816 @default.
• W2907331208 creator A5043436376 @default.
• W2907331208 date "2018-12-27" @default.
• W2907331208 modified "2023-10-17" @default.
• W2907331208 title "Complexation of Iron and Copper in Ambient Particulate Matter and Its Effect on the Oxidative Potential Measured in a Surrogate Lung Fluid" @default.
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• W2907331208 doi "https://doi.org/10.1021/acs.est.8b05731" @default.
• W2907331208 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30589257" @default.
• W2907331208 hasPublicationYear "2018" @default.
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