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铌具有熔点高、稳定性好、耐腐蚀等特点,在电子、化工、原子能、钢铁、航空和宇宙航行等领域中有重要的作用。据文献报道,铌在正常人体内的含量比Cr、Mn、Co、Mo和I还高,且发现癌症患者的发铌含量与正常人相比明显低下,差异十分显著。但铌的浓度过高,会引起中毒,铌的毒性主要是引起肝、肾损害。铌酸盐可抑制机体内的酶活性,破坏机体正常代谢。五氯化铌对皮肤粘膜有明显的刺激作用,可引起白细胞增高及凝血障碍。长期吸入铌的粉尘可导致尘肺。
Niobium has the characteristics of high melting point, good stability and corrosion resistance, and plays an important role in the fields of electronics, chemical industry, atomic energy, steel, aviation and space navigation. According to the literature, the content of niobium is higher than that of Cr, Mn, Co, Mo and I in normal human. The difference of niobium content in cancer patients is obviously lower than that in normal people, the difference is very significant. But the concentration of niobium is too high, can cause poisoning, niobium toxicity is mainly caused by liver and kidney damage. Niobate can inhibit the body’s enzyme activity, destroy the body’s normal metabolism. Niobium pentoxide on the skin and mucous membranes have a significant stimulating effect, can cause leukocytosis and coagulation disorders. Long-term inhalation of niobium dust can lead to pneumoconiosis.