硒资源及其开发利用概况

AN OUTLINE OF SELENIUM RESOURCES AND ITS EXPLOITATION AND UTILIZATION

硒是一种稀少而又分散的无素,在各种地球化学样品中含量甚微,在自然界它不易形成独立矿物而分散于其他矿物和介质中.早年人们只知道硒及其化合物的毒性,20世纪到50年代才发现硒还是动物和人体所必需的一种元素,它对生物生长和人体健康的显著作用,已经引起医学、地学、农业和生物等方面学者的关注,目前已被广泛应用于玻璃工业、冶金工业、电子工业、国防工业、化工、医学和农业等.

Abastract:Selenium is a rare and scattered element.There is few content in any kinds of geochemical samples.The element is difficult to form independent minerals of itself,but scattered in other minerals and media.In early years,people know only the plisonous nature of selenium and its chemical compounds.Until 1950s,selenium was recognized to be an essential element for animal and man.It has drawn attention of researchers from different fields in medical science,earth science,agriculture and biology.At present,selenium is widely used in glass making,metallurgy,electronics industry,national defense,chemical industry,medical science and agriculture.