摘要
本文采用硫酸亚铁还原，硼泥絮凝沉降的方法处理电镀废水中的铬（Ⅵ）．控制还原时的ｐＨ值为 ３．５～５．５，铬（Ⅵ）：硫酸亚铁：硼泥二１：２０：１４０（重量比），铬（Ⅵ）去除率达９９％以上．对于铬（Ⅵ）浓度小于１０００ｍｇ／Ｌ的废水，经一次处理，就可以达到国家的排放标准．
Reduce Cr(Ⅵ) to Cr(Ⅲ) with ferrisulphas firstly, then make it subside with boron sludge. The controling pH is in the range of 3.5~5.5 and Cr(Ⅵ): FeSO4 2H2O: boron sludge= 1:20:140 (weigh ratio), the removal rate is over 99%. After the wastewater whose concentration of Cr(Ⅵ) is below 1 000mg/L, being treated once with the method introduced in this paper, its concentration of Cr(Ⅵ) can be up to the 'wastewater emission standard'.
出处
《大连大学学报》
2000年第6期43-47,共5页
Journal of Dalian University
