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Temporal Changes in Soil Partitioning and Bioaccessibility of Arsenic, Chromium, and Lead

Scott Fendorfa,*, Matthew J. La Forceb and Guangchao Lia

a Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305-2115
b Department of Geosciences, San Francisco State University, San Francisco, CA 94132-4163



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  		Fig. 1. Temporal variation in bioaccessible concentrations (evaluated with the physiologically based extraction test [PBET] method) of arsenic, chromium, and lead within the A and B horizons of the Melton Valley soil. Incubation times commence at the point of contaminant addition.

 


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  		Fig. 2. Changes in the exchangeable (MgSO4–extractable) concentration of metals with increasing incubation time for the A and B horizons of the Melton Valley soil.

 




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