METHOD OF RESOLVING HEAVY METAL CONTAMINATION SOURCE BASED ON SEQUENTIAL EXTRACTION SCHEME AND ISOTOPE ANALYSIS SCHEME
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United States of America Patent
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Mar 19, 2015
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Mar 7, 2014
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Sep 13, 2013
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Disclosed is a method of resolving a heavy metal contamination source based on a sequential extraction scheme and an isotope analysis scheme. Pb isotopes are eluted at 5 types of “cation exchange fraction”, “carbonate fraction”, “iron-oxide and manganese hydroxide-fraction”, “organic matters and sulfide fraction”, and “residual fraction” existing at other types and separated from each other in each step. The Pb isotopes are analyzed and the origins of the Pb isotopes are specified in each step. The contamination source of the Pb isotope including 204Pb, 206Pb, and 207Pb is specified from a correlation between a ratio of 206Pb/204Pb obtained from a content of 206Pb and a content of 204Pb and a ratio of 206Pb/207Pb obtained from a content of 206Pb and a content of 207Pb in the Pb isotope.
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