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Childhood lead exposure in an industrial town in china: coupling stable isotope ratios with bioaccessible lead

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dc.contributor.authorLi, H.B.
dc.contributor.authorChen, K.
dc.contributor.authorJuhasz, A.L.
dc.contributor.authorHuang, L.
dc.contributor.authorMa, L.Q.
dc.date.issued2015
dc.descriptionData source: Supporting information, http://pubs.acs.org/doi/suppl/10.1021/es5060622
dc.description.abstractFingerprinting based on stable isotopes of lead (Pb) in blood and environmental media helps to identify Pb exposure pathways in children. However, previous studies used stable isotopes of total Pb in media. In this study, a wire rope production town in China (Zhuhang) was selected for investigating the effectiveness of using isotope ratios in bioaccessible Pb to identify childhood Pb exposure pathways. Blood Pb levels of 115 children in Zhuhang were 1.7–20.4 μg dL–1, averaging 6.1 ± 3.2 μg dL–1 (mean ± standard deviation), and were ∼1.6 times the national average in China (3.9 ± 1.8 μg dL–1). Among different environmental media (housedust, soil, PM10, vegetables, rice, and drinking water), housedust (695 ± 495 mg kg–1) and vegetables [0.36 ± 0.40 mg (kg of fresh weight)−1] contained elevated Pb concentrations. The isotope ratios (207Pb/206Pb and 208Pb/206Pb) of total Pb were the highest in housedust (0.8587 ± 0.0039 and 2.1049 ± 0.0087) but lower than blood Pb ratios (0.8634 ± 0.0027 and 2.1244 ± 0.0061). When using bioaccessible Pb in housedust (0.8639 ± 0.0018 and 2.1171 ± 0.0036), the isotope ratios overlapped with blood Pb ratios, suggesting that incidental ingestion of housedust was the predominant contributor to children’s blood Pb. Coupling the stable isotope technique with bioaccessible Pb is more reliable for identifying Pb exposure pathways than total Pb determinations.
dc.identifier.citationEnvironmental Science and Technology, 2015; 49(8):5080-5087
dc.identifier.doi10.1021/es5060622
dc.identifier.issn0013-936X
dc.identifier.issn1520-5851
dc.identifier.urihttps://hdl.handle.net/11541.2/118751
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rightsCopyright 2015 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html)
dc.source.urihttps://doi.org/10.1021/es5060622
dc.subjectlead exposure
dc.subjectbioaccessible lead
dc.subjectchildren
dc.subjectChina
dc.subjectisotope ratios
dc.subjectlead exposure pathways
dc.titleChildhood lead exposure in an industrial town in china: coupling stable isotope ratios with bioaccessible lead
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12143286130001831 13143283370001831 9915989790401831_53132417770001831.pdf
ror.mmsid9915989790401831

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