METHOD OF RESOLVING HEAVY METAL CONTAMINATION SOURCE BASED ON SEQUENTIAL EXTRACTION SCHEME AND ISOTOPE ANALYSIS SCHEME

摘要

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.