the water was reacting with the ferrous iron in the tank.
水箱中的铁质产生化学反应。
the resistance to nickel, cobalt, zinc, copper and cadmium of ubk03 were determined by measuring the ferrous iron concentration.
利用该菌在培养过程中亚铁离子的变化规律,分析了该菌对金属离子镍、钴、锌、铜和镉的抗性。
in the first step, a ferrous iron solution is oxidized to ferric iron.
在第一段中,二价铁离子溶液被氧化成三价铁离子溶液。
it shows that there is very little ferrous iron on mercury「s surface even though iron contributes 60% of its weight. the planet」s crust and mantle may under the same circumstance.