硒是地球上的一种稀有分散元素,与硅、碲、砷同属半金属。硒有多种形态,其中以灰色晶体的硒最为稳定,呈金属光泽,它的粉末显红色。人类发现硒的存在只不过是180多年前的事。1817年,一位化学家首先从硫酸生产的废泥中发现了硒。1818年,瑞典化学家贝采利乌斯确认硒为一种元素。不幸的是,硒刚被人类发现不久,就蒙受了不白之冤。有人在不严密的实验中,得出“硒是致癌物质”的错误结论。此后的近百年来,人们一直“谈硒色变”而遭到冷落。硒的工业化生产是在本世纪初开始的。第二次世界大战之前,硒主要的用途是用于玻璃工业、橡胶工业以及某些化学工业部门。第二次世界大战期间,开始用 Selenium is a rare earth scattered element, and silicon, tellurium, arsenic belong to the same half-metal. There are many forms of selenium, of which the most stable gray selenium crystals, metallic luster, its powder was red. The discovery of selenium in humans is nothing more than 180 years ago. In 1817, a chemist first discovered selenium from waste sludge produced from sulfuric acid. In 1818, the Swedish chemist Bezélius identified selenium as an element. Unfortunately, just discovered by human beings selenium soon, they suffered an innocent injustice. Some people in the experiment is not rigorous, come to “selenium is carcinogenic ” the wrong conclusion. After nearly a hundred years, people have been “talk about selenium color change” and been left out. Industrial production of selenium started at the beginning of this century. Prior to the Second World War, selenium was mainly used in the glass industry, the rubber industry and certain chemical industry sectors. During World War II, began to use