用吸附了铬离子的针铁矿进行的二次吸附实验（条件同前）去除率达到80％左右，表明该针铁矿可以重复利用。

Re-adsorption under the conditions ibidem got the removal ratio 80% indicated that the material can be utilized for several times.

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当这些表面和磁铁矿一接触，氧原子就能从石英砂转移到磁铁矿，形成了一种新的矿物，赤铁矿。

When these surfaces came into contact with the magnetite, an oxygen atom could be transferred from quartz to magnetite, forming a new mineral, hematite.

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铁矿石价格下跌0.85%——尽管铜价和铁矿石价格仍接近历史最高位。

Iron ore fell by 0.85 per cent - although both copper and iron ore remain close to historic highs.

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