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Sampling the Soils Around a Residence Containing Lead-Based Paints: An X-ray Fluorescence Experiment
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Abstract
Sampling experiments utilizing field portable instruments are instructional since students collect data following regulatory protocols, evaluate it, and begin to recognize their civic responsibilities upon collecting useful data. A lead-in-soil experiment educated students on a prevalent exposure pathway. The experimental site was a pre-1950 construction known to have lead-based paint. Soil sampling occurred at multiple locations within the house dripline and a background sample was selected away from the house. Student teams sampled in situ following U.S. EPA Method 6200. Students obtained data quickly with an X-ray fluorescence (XRF) instrument and recognized the importance of sampling. A risk assessment was inherent to the experiment because the XRF generates X-rays. A more than five fold increase in soil lead content for dripline samples was observed relative to the background. Students reported their data and provided advice on methods to minimize contact with this soil to the homeowner. This sampling lab was a valuable general science lab and could be adapted for environmental chemistry and instrumental analysis courses.
Keywords (Audience):
First-Year Undergraduate / GeneralKeywords (Domain):
Analytical ChemistryKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
Applications of ChemistryCiting Articles
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This article has been cited by 4 ACS Journal articles (4 most recent appear below).
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Chemical Environment Effects on Kβ/Kα Intensity Ratio: An X-ray Fluorescence Experiment on Periodic Trends
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Chaney R. Durham, Jeffery M. Chase, Delana A. Nivens, William H. Baird, and Clifford W. PadgettJournal of Chemical Education2011 88 (6), 819-821X-ray fluorescence (XRF) data from an energy-dispersive XRF instrument were used to investigate the chlorine Kα and Kβ peaks in several group 1 salts. The ratio of the peak intensity is sensitive to the local chemical environment of the chlorine atoms ...
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Peter T. PalmerJournal of Chemical Education2011 Article ASAPPortable Energy-Dispersive X-Ray Fluorescence (XRF) analyzers have undergone significant improvements over the past decade. Salient advantages of XRF for elemental analysis include minimal sample preparation, multielement analysis capabilities, detection ...
Studying the Redevelopment of a Superfund Site: An Integrated General Science Curriculum Paying Added Dividends
Steven J. Bachofer2010 1037 (), 117-133Studying the Redevelopment of a Superfund Site: An Integrated General Science Curriculum Paying Added Dividends
Steven J. Bachofer2010 1037 (), 117-133AbstractA new general education science course on the redevelopment of Superfund sites integrated environmental risk assessment and basic chemical concepts. The infusion of civic engagement allowed the curriculum to be explicit in contributing to the ...
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- Received: August 03, 2009
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