離子浮選法處理電鍍廢水實(shí)驗(yàn)研究
更新時(shí)間：2014-07-16 10:44
來(lái)源：環(huán)境工程學(xué)報(bào)
作者:
閱讀：2217
| 中文摘要: |
| 進(jìn)行離子浮選法處理電鍍廢水的研究，對(duì)影響因素pH、CA∶CMe(摩爾比)、離子強(qiáng)度、浮選時(shí)間和通氣量等進(jìn)行了實(shí)驗(yàn)研究。實(shí)驗(yàn)結(jié)果表明：離子分離選擇性遞減順序?yàn)椋篊d2+>Zn2+>Fe2+ >Cu2+>Ni2+。當(dāng)CA∶CMe為2.5～3∶1，pH為8.5～9，離子強(qiáng)度不高于0.0001 mol/L時(shí)，離子浮選對(duì)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(dá)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(dá)到排放標(biāo)準(zhǔn)。泡沫產(chǎn)品中鎘、鋅、銅、鎳品位分別達(dá)到3.2％、9.3%、18.1%和13.2%，具有極高的資源回收價(jià)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 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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