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Title: Lead speciation in indoor dust: a case study to assess old paint contribution in a Canadian urban house

Abstract

Residents in older homes may experience increased lead (Pb) exposures due to release of lead from interior paints manufactured in past decades, especially pre-1960s. The objective of the study was to determine the speciation of Pb in settled dust from an urban home built during WWII. X-ray absorption near-edge structure (XANES) and micro-X-ray diffraction (XRD) analyses were performed on samples of paint (380-2,920 mg Pb kg{sup -1}) and dust (200-1,000 mg Pb kg{sup -1}) collected prior to renovation. All dust samples exhibited a Pb XANES signature similar to that of Pb found in paint. Bulk XANES and micro-XRD identified Pb species commonly found as white paint pigments (Pb oxide, Pb sulfate, and Pb carbonate) as well as rutile, a titanium-based pigment, in the <150 {micro}m house dust samples. In the dust fraction <36 {micro}m, half of the Pb was associated with the Fe-oxyhydroxides, suggesting additional contribution of outdoor sources to Pb in the finer dust. These results confirm that old paints still contribute to Pb in the settled dust for this 65-year-old home. The Pb speciation also provided a clearer understanding of the Pb bioaccessibility: Pb carbonate > Pb oxide > Pb sulfate. This study underscores the importance of takingmore » precautions to minimize exposures to Pb in house dust, especially in homes where old paint is exposed due to renovations or deterioration of painted surfaces.« less

Authors:
; ;  [1];  [2]
  1. (Health Canada)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1049568
Resource Type:
Journal Article
Journal Name:
Environ. Geochem. Hlth.
Additional Journal Information:
Journal Volume: 33; Journal Issue: (4) ; 2011; Journal ID: ISSN 0269-4042
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 59 BASIC BIOLOGICAL SCIENCES; ABSORPTION; CARBONATES; DIFFRACTION; DUSTS; INDOORS; OUTDOORS; OXIDES; PIGMENTS; RUTILE; SPECTROSCOPY; X-RAY DIFFRACTION

Citation Formats

Beauchemin, Suzanne, MacLean, Lachlan C.W., Rasmussen, Pat E., and NRC). Lead speciation in indoor dust: a case study to assess old paint contribution in a Canadian urban house. United States: N. p., 2012. Web. doi:10.1007/s10653-011-9380-8.
Beauchemin, Suzanne, MacLean, Lachlan C.W., Rasmussen, Pat E., & NRC). Lead speciation in indoor dust: a case study to assess old paint contribution in a Canadian urban house. United States. doi:10.1007/s10653-011-9380-8.
Beauchemin, Suzanne, MacLean, Lachlan C.W., Rasmussen, Pat E., and NRC). Tue . "Lead speciation in indoor dust: a case study to assess old paint contribution in a Canadian urban house". United States. doi:10.1007/s10653-011-9380-8.
@article{osti_1049568,
title = {Lead speciation in indoor dust: a case study to assess old paint contribution in a Canadian urban house},
author = {Beauchemin, Suzanne and MacLean, Lachlan C.W. and Rasmussen, Pat E. and NRC)},
abstractNote = {Residents in older homes may experience increased lead (Pb) exposures due to release of lead from interior paints manufactured in past decades, especially pre-1960s. The objective of the study was to determine the speciation of Pb in settled dust from an urban home built during WWII. X-ray absorption near-edge structure (XANES) and micro-X-ray diffraction (XRD) analyses were performed on samples of paint (380-2,920 mg Pb kg{sup -1}) and dust (200-1,000 mg Pb kg{sup -1}) collected prior to renovation. All dust samples exhibited a Pb XANES signature similar to that of Pb found in paint. Bulk XANES and micro-XRD identified Pb species commonly found as white paint pigments (Pb oxide, Pb sulfate, and Pb carbonate) as well as rutile, a titanium-based pigment, in the <150 {micro}m house dust samples. In the dust fraction <36 {micro}m, half of the Pb was associated with the Fe-oxyhydroxides, suggesting additional contribution of outdoor sources to Pb in the finer dust. These results confirm that old paints still contribute to Pb in the settled dust for this 65-year-old home. The Pb speciation also provided a clearer understanding of the Pb bioaccessibility: Pb carbonate > Pb oxide > Pb sulfate. This study underscores the importance of taking precautions to minimize exposures to Pb in house dust, especially in homes where old paint is exposed due to renovations or deterioration of painted surfaces.},
doi = {10.1007/s10653-011-9380-8},
journal = {Environ. Geochem. Hlth.},
issn = {0269-4042},
number = (4) ; 2011,
volume = 33,
place = {United States},
year = {2012},
month = {10}
}