对硫酸亚铁法处理电镀含氰废水进行了试验研究，探讨了硫酸亚铁除氰的原理及其去除效果。

This paper studies the treatment of electroplating CN-contained wastewater by ferrous sulfate, and investigates the elements and the effect of this treatment.

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重铬酸钾—硫酸亚铁法主要难题是在计算时无法知道沉积物中有机碳的氧化数，因而所测值不够准确。

Its result has to be colibrated. Because the structure of organic substances is complicated, the number of oxidation valence of carbon is assumed zero when calculating organic carbon.

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