六价铬废水的处理与回收研究

Processing and Recovery of Cr^(6+) Wastewater

含铬废液pH=3~4时,流量为10BV/h时,采用双阴离子交换柱串联全饱和工艺处理回收含六价铬废水,出水能满足国家排放标准,穿透体积大。利用阳离子交换树脂柱除去再生液中的钠离子,去除率可达到83%,纯化后的含六价铬溶液能再次投入使用。

The pH of Cr6＋ wastewater was 3 -4, flow rate was 10BV/h. Two negatively charged ion-exchange resin columns were serialized and saturated to recover Cr6＋ wastewater. The permeability was high and processed water could meet national discharge standards. Then positively charged ion-exchange resin was employed to remove Na＋ in the recovered water, and 83% of Na＋ could be removed. After that the purified Cr6＋solution could be reused.