At first glance, it’s hard to see what gold, iron, lead, arsenic, silver, platinum and tin have in common. A look at the periodic table will clear up the confusion: they are all heavy metals, typically categorized as those metals with an atomic weight and density at least five times greater than water.
Click here for original story, Some plants can short-circuit the toxic effects of metals. Now scientists are trying to harness their power
Source: Phys.org