Migration regulation of heavy metals tailings of Pangushan tungsten ore

The tailings out of the mining and ore-dressing process in Pangushan Tungsten Ore release heavy metals with changing environment. The heavy metals released poses serious threat to the survival of the surrounding environment and species. This article studies heavy metals’migration regulation under different environmental conditions by selecting three representative tailings. The migration ability hierarchy for the tailings of 1950s-1960s is: As＞ Mo＞ Zn＞ Pb＞ Cr, in which As is highest, while the other four exhibit little difference. The migration ability hierarchy of heavy metals under 30-year artificial vegetation restoration is Zn＞As＞Mo＞Pb＞Cr, in which As and Zn have the maximum migration rate. The migration ability for new tailings is Mo＞Zn＞As＞Cr＞Pb