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Water purification 水的净化 Any old iron? 有废铁吗? A little-known chemical may provide a new way toclean water 一种鲜为人知的化学物质可能为清洁水源带来一线希望 IRON in water is normally regarded a pollutant. 水中的铁原子通常被认为是一种污染源。 Luke Daly, the boss of Ferrate Treatment Technologies of Orlando, Florida, however, plans toturn that thought on its head. 然而，弗罗里达州奥兰多高铁酸盐技术处理所所长Luke Daly，计划颠倒这一认知。 He intends to use a chemically unusual form of iron to clean water up, not make it dirty. 他将利用铁原子的一种非通常化学形态来净化水源，而非污染水源。 Iron is found in the part of the periodic table known as the transition metals. 铁是化学元素周期表中的一部分，也被熟知为过渡金属。 Like all metals, these react with other elements by giving up electrons to form positivelycharged ions. 像所有的金属一样，铁原子与其他元素反应，释放电子形成带正电的离子。 Transition metals, though, give updifferent numbers of electrons in different circumstances, and thus have ions of variouscharges. | 
