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Speciation of ^2^1^0Po and ^2^1^0Pb in air particulates determined by sequential extraction [An article from: Journal of Environmental Radioactivity]
Book Details
PublisherElsevier
ISBN / ASINB000PAUY2Y
ISBN-13978B000PAUY26
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Speciation of ^2^1^0Po and ^2^1^0Pb in air particulates of two Syrian phosphate sites with different climate conditions has been studied. The sites are the mines and Tartous port at the Mediterranean Sea. Air filters were collected during September 2000 until February 2002 and extracted chemically using different selective fluids in an attempt to identify the different forms of these two radionuclides. The results have shown that the inorganic and insoluble ^2^1^0Po and ^2^1^0Pb (attached to silica and soluble in mineral acids) portion was found to be high in both sites and reached a maximum value of 94% and 77% in the mine site and Tartous port site, respectively. In addition, only 24% of ^2^1^0Pb in air particulates was found to be associated with organic materials probably produced from the incomplete burning of fuel vehicle and similar activities. Moreover, the ^2^1^0Po/^2^1^0Pb activity ratio in air particulates was higher than that in all samples at both sites and varied between 3.85 in November 2000 at Tartous port site and 20 in April 2001 at the mine area. These activity ratios were also higher than the natural levels. The ^2^1^0Po/^2^1^0Pb activity ratio was also determined in each portion resulting from the selective extraction and found to be higher than that in most samples. The sources of ^2^1^0Po excess in these portions are discussed. Soil suspension, which is common in the dry climate dominant in the area, sea water spray and heating of phosphate ores were considered; polonium is more volatile than the lead compounds at even moderate temperature. Furthermore, variations in the chemical forms of ^2^1^0Po and ^2^1^0Pb during the year were also investigated. However, the results of this study can also be utilized for dose assessment to phosphate industry workers.
Description:
Speciation of ^2^1^0Po and ^2^1^0Pb in air particulates of two Syrian phosphate sites with different climate conditions has been studied. The sites are the mines and Tartous port at the Mediterranean Sea. Air filters were collected during September 2000 until February 2002 and extracted chemically using different selective fluids in an attempt to identify the different forms of these two radionuclides. The results have shown that the inorganic and insoluble ^2^1^0Po and ^2^1^0Pb (attached to silica and soluble in mineral acids) portion was found to be high in both sites and reached a maximum value of 94% and 77% in the mine site and Tartous port site, respectively. In addition, only 24% of ^2^1^0Pb in air particulates was found to be associated with organic materials probably produced from the incomplete burning of fuel vehicle and similar activities. Moreover, the ^2^1^0Po/^2^1^0Pb activity ratio in air particulates was higher than that in all samples at both sites and varied between 3.85 in November 2000 at Tartous port site and 20 in April 2001 at the mine area. These activity ratios were also higher than the natural levels. The ^2^1^0Po/^2^1^0Pb activity ratio was also determined in each portion resulting from the selective extraction and found to be higher than that in most samples. The sources of ^2^1^0Po excess in these portions are discussed. Soil suspension, which is common in the dry climate dominant in the area, sea water spray and heating of phosphate ores were considered; polonium is more volatile than the lead compounds at even moderate temperature. Furthermore, variations in the chemical forms of ^2^1^0Po and ^2^1^0Pb during the year were also investigated. However, the results of this study can also be utilized for dose assessment to phosphate industry workers.
