[Application of Pb stable isotope in source identification of soil pollutants].
Stable isotopes are key importance for tracing the source of heavy metals in soils. 11 surface soil samples were collected in a contaminated site according to geostatistical results, which had a series of concentrations from almost background value of Pb to more than 2 000 microg x g(-1). Pb stable isotope composition of the soil samples was analyzed to imply the sources. The results showed that 206Pb/207Pb, 208Pb/204Pb and 206Pb/204Pb of soil samples were all remarkably correlated linearly with reciprocals of Pb concentration, and 206Pb/204Pb had a significant positive linear correlation with 208Pb/204Pb, which was consistent with binary mixing model. It can be inferred that soil Pb mainly came from two sources, an anthropogenic source and soil parent material.
Wu
Long-hua
LH
State Key Laboratory of Soil and Sustainable Agriculture, Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. lhwu@issas.ac.cn
Zhang
Chang-bo
CB
Zhang
Hai-bo
HB
Luo
Yong-ming
YM
D004784:Environmental Monitoring / Q000379:methods*; D007554:Isotopes / Q000032:analysis; D007854:Lead / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
D007554:Isotopes; D012989:Soil Pollutants; D007854:Lead