Phytotoxicity of Tailings Dam of the Dzhidinsky Tungsten–Molybdenum Combine (Western Transbaikalia)

The phytotoxicity of tailings dam of the Dzhidinsky tungsten–molybdenum combine has been studied. It is established that the content of toxic chemical elements (Pb, Zn, As, Cu, Co, Mo, Ni, W) in technogenic sands is extremely dangerous; the total contamination index (Zc) is 425–500. The phytotoxicity of the sands with respect to oats is different: the technogenic sands of the Barun-Naryn tailings refer to II (high) toxicity class, while the technogenic sands of the Modonkul deltoid deposit refer to V (normal) toxicity class. The index of total pollution by toxic elements (Zc) of plant oats grown on technogenic sands and their water extract is consistent to high level (aboveground part of plants—12–69, and underground parts—11–147).