论文部分内容阅读
近年来铁氧体法处理电镀废水的工艺已广泛应用。该方法的特点是:经过处理后的电镀废水,不仅水质能达到国家“工业废水排放标准”;而且能得到稳定的、无二次污染的沉渣。影响铁氧体生成的因素很多,其中硫酸亚铁的投加量是影响铁氧体生成的重要因素。亚铁盐绝大多数是采用硫酸亚铁。以处理含铬废水为例,铬酐浓度在100mg/L 时,其 CrO_3∶FeSO_4·7H_2O=1∶16～18;有的单位用1∶20～30;也有的采用1∶80,所以硫酸亚铁的投加量差别很大。在处理含铬、镍、铜、锌等
In recent years, the ferrite process for treating electroplating wastewater has been widely used. The method is characterized by: After the treated electroplating wastewater, not only the water quality can meet the national “industrial wastewater discharge standards”; but also can obtain a stable, no secondary pollution sediment. There are many factors affecting the formation of ferrite, and the amount of ferrous sulfate added is an important factor affecting the formation of ferrite. The vast majority of ferrous salts are ferrous sulfate. For treating chromium-containing wastewater, for example, when the concentration of chromic anhydride is 100 mg/L, CrO_3:FeSO_4·7H_2O=1:16~18; some units use 1:20~30; others use 1:80, so the The amount of iron added varies greatly. In the treatment of chromium, nickel, copper, zinc, etc.