含Cr^(6+)电镀废槽液的处理

Treatment of chromium( Ⅵ)- containing electroplate wastewater

本文提出了详细的处理含Cr6+电镀废水处理工艺,采用了化学还原沉淀处理法,确定了焦亚硫酸钠作为还原剂,当溶液p H保持在2.0,焦亚硫酸钠的用量为14.95 g/L时,Cr6+能够被完全还原为Cr3+;当溶液p H值为8.0,沉淀效果最好,Cr3+去除率可达到99.8%。这对实际的工程操作具有指导意义。

In this paper,chemical reduction and precipitation method was used to treat the electroplate wastewater which contained high level of chromium（ VI）,and some parameters were determined through experiments. In this method,sodium metabisulfite was used as the reducing agent.When the p H of the solution was controlled at 2. 0,and the dosage of sodium metabisulfite was 14. 95 g / L,almost all the chromium（ VI） could be reduced into chromium（ Ⅲ）; then when the p H was adjusted to 8. 0,99. 8% of chromium（ Ⅲ） could be precipitated and removed. The result of this study could be helpful reference for engineering practices.