The Radiological Impact of ²¹⁰Pb and ²¹⁰Po Released from the Iron- and Steel-Making Plant ILVA in Taranto (Italy) on the Environment and the Public

Table 7

The ²¹⁰Po and ²¹⁰Pb concentrations in kBq kg⁻¹ and lead contents in the dust particle samples collected from the first (DP1 and DP3) and second (DP2 and DP4) filtration systems of the ILVA Taranto on 16 March–5 May 2009.

Sample no.	Collection date	Sample weight, g	Po yield, %	^210Po	Pb yield, %	^210Pb	^210Po/^210Pb	Lead, %
DP1	16 March 2009	1.1318	73.3	10.9±1.1	93.8	6.41±0.26	1.70	0.470±0.016
DP2	16 March 2009	1.1969	100	22.5±1.0	93.8	13.5±0.6	1.67	0.921±0.032
DP3	5 May 2009	3.27400	100	5.91±0.24^∗	99.4	5.44±0.23	—	0.403±0.002
DP4	5 May 2009	3.03932	100	19.8±0.8^∗	99.5	18.8±0.8	—	1.75±0.01
Mean ± 1SD	—	—	93.3±13.4	—	96.6±3.3	—	1.38±0.36	—
Range	—	1.1318–3.2740	73.3–100	5.91–22.5	93.8–99.5	5.44–18.8	1.05–1.70	0.403–1.75

 *The ²¹⁰Po concentrations in DP3 and DP4 sample is not representative due to the long storage time.