METHOD FOR RESOLVING SOURCES OF HEAVY METAL CONTAMINANTS BY SEQUENTIAL EXTRACTION SCHEME AND ISOTOPE ANALYSIS

摘要

Disclosed is a heavy metal contaminant analyzing method by a continuous extraction method and an isotope analysis. The heavy metal contaminant analyzing method by the continuous extraction method and the isotope analysis elutes 5 kinds of PB isotopes such as a cation exchange accompaniment type, a carbonate mineral accompaniment type, an iron oxide-manganese hydroxide mineral accompaniment type, organic material and sulfide mineral accompaniment type, and a remaining type which exists by the rest forms (mostly by a form of silicate minerals) in each step; which analyzes the PB isotopes of a specimen obtained in each step; and specifies the origins or the beginnings of the PB isotopes of each step based on a content ratio of each PB isotope. Contaminants of the PB isotopes can be specified based on the correlation between a rate of the 206PB content of the PB isotopes with respect to the 204PB content of the PB isotopes and a rate of the 206PB content of the PB isotopes with respect to the 207PB content of the PB isotopes. [Reference numerals] (AA) START; (BB) END; (S10) Step 1: stirring 1M MgCl_2(PH = 7) for 1 hour; (S15,S25,S35,S45,S55) Pb isotope analysis; (S20) Step 2: controlling pHof 1M CH_3COONa to be pH 5 by using with HOAc, stirring for 5 hours; (S30) Step 3: controlling pH of 0.04M NH_2OH쨌HCI + 25% HOAc to be pH 2, heating at 96°C for 6 hours; (S40) Step 4:30% H_2O_2 + 0.02M HNO_3, stirring for 30 minutes after heating at 85°C for 5 hours; (S50) step 5:HF_3 + HCIO_4, evaporation and drying at 110°C; 12M HCI, heating for 30 minutes