[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.
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
Long-hua
LH
Wu
Chang-bo
CB
Zhang
Hai-bo
HB
Zhang
Yong-ming
YM
Luo
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