摘要:
进行离子浮选法处理电镀废水的研究，对影响因素pH、CA∶CMe(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CA∶CMe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。
Abstract:
In this study, ion flotation method was used to dispose the electroplating wastewater. The effects of pH value, the ratio of CA∶CMe,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 CA∶CMe 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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