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| DOI: | 10.2134/jeq2005.0464 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/articles/35/6/2066
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/35/6/2066
Last checked: 11/08/2016
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Clark, Heather F.;
Brabander, Daniel J.;
Erdil, Rachel M. |
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| Author Affiliation: | Clark and Brabander: Geosciences Department; Erdil: Wellesley College, Wellesley, Massaschusetts |
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| Title: | Sources, sinks, and exposure pathways of lead in urban garden soil |
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| Section: | Technical reports: Heavy metals in the environment
Other records with the "Technical reports: Heavy metals in the environment" Section
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| Source: | Journal of Environmental Quality. Vol. 35, No. 6, November/December 2006, p. 2066-2074. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Sources; Lead; Exposure assessment; Contamination; Urban landscaping; Radiography; Petroleum; Safety
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| Abstract/Contents: | "The chemistry of Pb in urban soil must be understood in order to limit exposure to Pb in soil and produce and to implement remediation schemes. In inner-city gardens where Pb contamination is prevalent and financial resources are limited, it is critical to identify the variables that control Pb bioavailability. Field-portable X-ray fluorescence was used to measure Pb in 103 urban gardens in Roxbury and Dorchester, MA, and 88% were found to contain Pb above the USEPA reportable limit of 400 μg g-1. Phosphorous, iron, loss on ignition, and pH data were collected, Pb-bearing phases were identified by X-ray diffraction, and Pb isotopes were measured using inductively coupled plasma mass spectrometry. Four test crops were grown both in situ and in Roxbury soil in a greenhouse, and plant tissue was analyzed for Pb uptake by polarized energy-dispersive X-ray fluorescence. Variation at the neighborhood scale in soil mineralogical and chemical characteristics suggests that the bioavailable fraction of Pb in gardens is site specific. Based on Pb isotope analysis, two historical Pb sources appear to dominate the inventory of Pb in Roxbury gardens: leaded gasoline (207 Pb/206 = 0.827) and Pb-based paint (207 Pb/206 Pb = 0.867). Nearly 70% of the samples analyzed can be isotopically described by mixing these two end members, with Pb-based paint contribution 40 to 80% of the mass balance. A simplified urban human exposure model suggests that the consumption of produce from urban gardens is equivalent to approximately 10 to 25% of children's daily exposure from tap water. Furthermore, analysis of over 60 samples of plant tissue from the four test species suggests that in these urban gardens unamended phytoremediation is an inadequate tool for decreasing soil Pb." |
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| Language: | English |
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| References: | 45 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Clark, H. F., D. J. Brabander, and R. M. Erdil. 2006. Sources, sinks, and exposure pathways of lead in urban garden soil. J. Environ. Qual. 35(6):p. 2066-2074. |
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| DOI: 10.2134/jeq2005.0464 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/articles/35/6/2066
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/35/6/2066
Last checked: 11/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 900 .J6 |
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