环保科技
環保科技
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ENVIRONMENTAL PROTECTION AND TECHNOLOGY
2015年
2期
48-51
,共4页
电镀含Cr6+废水%化学还原沉淀%焦亚硫酸钠
電鍍含Cr6+廢水%化學還原沉澱%焦亞硫痠鈉
전도함Cr6+폐수%화학환원침정%초아류산납
electroplating wastewater containing chromium(Ⅵ)%chemical reduction and precipitati-on%sodium metabisulfite
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pH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pH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。
本文提齣瞭詳細的處理含Cr6+電鍍廢水處理工藝，採用瞭化學還原沉澱處理法，確定瞭焦亞硫痠鈉作為還原劑，噹溶液pH保持在2.0，焦亞硫痠鈉的用量為14.95 g/L時，Cr6+能夠被完全還原為Cr3+；噹溶液pH值為8.0，沉澱效果最好，Cr3+去除率可達到99.8%。這對實際的工程操作具有指導意義。
본문제출료상세적처리함Cr6+전도폐수처리공예，채용료화학환원침정처리법，학정료초아류산납작위환원제，당용액pH보지재2.0，초아류산납적용량위14.95 g/L시，Cr6+능구피완전환원위Cr3+；당용액pH치위8.0，침정효과최호，Cr3+거제솔가체도99.8%。저대실제적공정조작구유지도의의。
In this paper,chemical reduction and precipitation method was used to treat the electro-plate wastewater which contained high level of chromium( VI ),and some parameters were deter-mined through experiments. In this method,sodium metabisulfite was used as the reducing agent. When the pH 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 pH 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.
