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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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Figure AX7-1.1.2. Variation <strong>of</strong> bioavailability with particle size.<br />

(BAF = 17%). Other evidence is more empirical, as illustrated in Figure AX7-1.1.4, where a<br />

large particle <strong>of</strong> native Pb is shown to have developed a weathering ring <strong>of</strong> highly bioavailable<br />

Pb-chloride and Pb-oxide. Such observations can be useful in understanding the mechanistic<br />

phenomena controlling bioavailability. In addition, they will aid in developing and validating<br />

models to predict metal-environment interactions.<br />

AX7-7

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