摘要
用亚硫酸钠将电镀废液中的六价铬还原为三价铬,用硫化钠除去铜,用氢氧化钠沉淀三价铬后,用一定量的硫酸溶解氢氧化铬后得到碱式硫酸铬加以回收利用。
Cr（ Ⅵ ） in waste electroplating solution was reduced to Cr（ Ⅲ ） by the reductant Na2SO3 ,the copper was removed by Na2 S. After Cr（ Ⅲ ） was precipitated by NaOH, hydroxy-chromium sulfuric was obtained by adding sulfuric acid.
出处
《环境保护科学》
CAS
2005年第6期43-44,共2页
Environmental Protection Science
关键词
电镀废液
铬
回收
氧化还原
Waste electroplating Solution Chromium Recycling Oxidation- reduction
