关键词: 环境污染, 铅, 镉, 中毒, 动物

Abstract: The concentrations of twelve minerals (Pb, Cd, Cu, Zn, Fe, As, F, Mo, Se, Mn, Ca, P) in soils, water, forages, crops, grains and blood, hair and tissues of animals were measured in surrounding of the Baiyin mining area. The function and construction of tissues were studied in affected animals. The result indicated that the waste gas and waste water produced in metals melting in factories caused Pb, Cd, Cu and Zn pollution to some extent in the surrounding environment. The concentrations of these elements were significantly higher as compared with those in the normal area (P<0.01). The contents of Pb, Cd were 9 and 680 times in forages, respectively, 10 and 35 times in grain as compared with the control area. The anemia occurred in affected animals belongs to a hypochromic and microcytic pattern. Pathological changes were characterized by the dysfunction and structural lesion in parenchymatous organs. It is therefore suggested that the disease of livestock in this region is caused by lead and cadmium poisoning, mainly due to environment heavy metal pollution by industry activities. Meanwhile, accumulations of Pb and Cd in animal food would impair man's health. Thus it can be seen that knowledge of Pb and Cd concentrations in livestock is important for assessing the effects of pollutions on domestic animals and

Key words: Environmental pollution, Lead, Cadmium, Poisoning, Animals