Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Environ Pollut. 2011 Dec;159(12):3406-10. doi: 10.1016/j.envpol.2011.08.037. Epub 2011 Sep 7.
Lead isotopes and heavy metal concentrations were measured in two sediment cores sampled in estuaries of Xiangjiang and Lishui Rivers in Hunan province, China. The presence of anthropogenic contribution was observed in both sediments, especially in Xiangjiang sediment. In the Xiangjiang sediment, the lower (206)Pb/(207)Pb and higher (208)Pb/(206)Pb ratio, than natural Pb isotope signature (1.198 and 2.075 for (206)Pb/(207)Pb and (208)Pb/(206)Pb, respectively), indicated a significant input of non-indigenous Pb with low (206)Pb/(207)Pb and high (208)Pb/(206)Pb. The corresponding concentrations of heavy metals (As, Cd, Zn, Mn and Pb) were much higher than natural values, suggesting the contaminations of heavy metals from extensive ore-mining activities in the region.
在中国湖南省湘江和丽水江的两个河口采集的两个沉积物岩心中测量了铅同位素和重金属浓度。在两种沉积物中都观察到了人为贡献的存在，特别是在湘江沉积物中。在湘江沉积物中，较低的（206）Pb /（207）Pb 和较高的（208）Pb /（206）Pb 比值，与自然铅同位素特征（（206）Pb /（207）Pb 和（208）Pb /（206）Pb 分别为 1.198 和 2.075）相比，表明存在大量低（206）Pb /（207）Pb 和高（208）Pb /（206）Pb 的非本土 Pb 的显著输入。相应的重金属（As、Cd、Zn、Mn 和 Pb）浓度远高于自然值，表明该地区广泛的矿石开采活动导致了重金属的污染。
