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离子浮选法处理电镀废水实验研究

更新时间:2014-07-16 10:44 来源:环境工程学报 作者: 阅读:2251 网友评论0

中文摘要:
      进行离子浮选法处理电镀废水的研究,对影响因素pH、CACMe(摩尔比)、离子强度、浮选时间和通气量等进行了实验研究。实验结果表明:离子分离选择性递减顺序为:Cd2+>Zn2+>Fe2+ >Cu2+>Ni2+。当CACMe为2.5~3∶1,pH为8.5~9,离子强度不高于0.0001 mol/L时,离子浮选对镉、锌、铜、镍等金属离子均有很高的去除率,Cd2+、Zn2+、Fe 2+、Ni 2+、Cu2+残余浓度最低分别可达0.05、0.20、0.22、0.28和0.33 mg/L,处理后的电镀废水各污染物浓度均达到排放标准。泡沫产品中镉、锌、铜、镍品位分别达到3.2%、9.3%、18.1%和13.2%,具有极高的资源回收价值。
英文摘要:
      In this study, ion flotation method was used to dispose the electroplating wastewater. The effects of pH value, the ratio of CACMe,ion strength, flotation time, volume of aeration on the treatment of the electroplating wastewater were studied. Experimental results showed that the decreasing order to separate the ions was Cd2+>Zn2+>Fe2+>Cu2+>Ni2+. The preferential segregation for the cadmium, zinc, copper, nickel was that the ratio of CACMe was 2.5~3.1, pH value was 8.5~9, and the ion strength was less than 0.0001 mol/L. In this case, the residual concentrations of the Cd2+, Zn2+, Fe2+, Ni2+ and Cu2+ were 0.05, 0.20, 0.22,0.28 and 0.33 mg/L, respectively. After electroplating wastewater were disposed, the pollutant concentration complied with the discharge standard. The concentrations of the chromium, copper and nickel in the disposal froth product were 3.2%,9.3%,18.1% and 13.2%, respectively, which showed that there was a great reclamation value.
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