離子浮選法處理電鍍廢水實驗研究

更新時間：2014-07-16 10:44 來源：環(huán)境工程學報作者: 閱讀：2521

中文摘要:

進行離子浮選法處理電鍍廢水的研究，對影響因素pH、C_A∶C_Me(摩爾比)、離子強度、浮選時間和通氣量等進行了實驗研究。實驗結(jié)果表明：離子分離選擇性遞減順序為：Cd²⁺>Zn²⁺>Fe²⁺ >Cu²⁺>Ni²⁺。當C_A∶CMe為2.5～3∶1，pH為8.5～9，離子強度不高于0.0001 mol/L時，離子浮選對鎘、鋅、銅、鎳等金屬離子均有很高的去除率，Cd²⁺、Zn²⁺、Fe ²⁺、Ni ²⁺、Cu²⁺殘余濃度最低分別可達0.05、0.20、0.22、0.28和0.33 mg/L，處理后的電鍍廢水各污染物濃度均達到排放標準。泡沫產(chǎn)品中鎘、鋅、銅、鎳品位分別達到3.2％、9.3%、18.1%和13.2%，具有極高的資源回收價值。

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 C_A∶C_Me,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 C_A∶C_Me 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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