Document Detail


Heterogeneous atmospheric chemistry of lead oxide particles with nitrogen dioxide increases lead solubility: environmental and health implications.
MedLine Citation:
PMID:  23057678     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Heterogeneous chemistry of nitrogen dioxide with lead-containing particles is investigated to better understand lead metal mobilization in the environment. In particular, PbO particles, a model lead-containing compound due to its widespread presence as a component of lead paint and as naturally occurring minerals, massicot, and litharge, are exposed to nitrogen dioxide at different relative humidity. X-ray photoelectron spectroscopy (XPS) shows that upon exposure to nitrogen dioxide the surface of PbO particles reacts to form adsorbed nitrates and lead nitrate thin films with the extent of nitrate formation relative humidity dependent. NO(2)-exposed PbO particles are found to have an increase in the amount of lead that dissolves in aqueous suspensions at circumneutral pH compared to particles not exposed. These results point to the potential importance and impact that heterogeneous chemistry with trace atmospheric gases can have on increasing solubility and therefore the mobilization of heavy metals, such as lead, in the environment. This study also shows that surface intermediates that form, such as adsorbed lead nitrates, can yield higher concentrations of lead in water systems. These water systems can include drinking water, groundwater, estuaries, and lakes.
Authors:
Jonas Baltrusaitis; Haihan Chen; Gayan Rubasinghege; Vicki H Grassian
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-11-12
Journal Detail:
Title:  Environmental science & technology     Volume:  46     ISSN:  1520-5851     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-04     Completed Date:  2013-05-06     Revised Date:  2014-03-19    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  12806-13     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Environmental Pollutants / chemistry*
Gases / chemistry
Lead / chemistry*
Nitrogen Dioxide / chemistry*
Oxides / chemistry*
Paint / analysis*
Solubility
Grant Support
ID/Acronym/Agency:
P30 ES005605/ES/NIEHS NIH HHS; P30 ES05605/ES/NIEHS NIH HHS
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Gases; 0/Oxides; 2P299V784P/Lead; 4IN6FN8492/lead oxide; S7G510RUBH/Nitrogen Dioxide
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