Tin Ore Tailing Reservoir Dominant Plants Heavy Metal Accumulation Characteristics of Yunnan

摘要

According to the field investigation, collecting five kinds of dominant plant from tin ore tailing reservoir of Gejiu and tailing reservoir soil samples by flame atomic absorption spectrometry for the determination of five kinds of dominant plant roots, stems, leaves and its growth soil's Pb, Zn, Cu and Cd contents, and analyzes five kinds of plant transfer and accumulation coefficient. The results showed that: soil heavy metal pollution is serious, especially Cd pollution; Lactuca indic L, Cattail, Alopecurus aequalis and Cyperus rotundus L. plants of heavy metal contents are the same, all is Zn﹥Cu﹥Pb﹥Cd, but four kinds of heavy metal contents are Pb﹥Zn﹥Cu﹥Cd in Neyruadia plants; Lactuca indic L, Cyperus rotundus L, Alopecurus aequalis and Cattail to Pb, Zn, Cu and Cd four kinds of heavy metals accumulation ability is weaker. But from the root to the ground part organ transfer ability aspects: four kinds of heavy metal in Lactuca indic L is strong, Pb and Cd two elements in the Cyperus rotundus L is more stronger, Cd in Alopecurus aequalis is more stronger, Zn, Cu and Cd in Cattail is more stronger; the accumulation and transfer coefficient are larger than one, it was a better plant which removes Pb.