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Continuous electrodeionization for removal and recovery of Cr(VI) from wastewater

机译:连续电去离子法从废水中去除和回收六价铬

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Continuous electrodeionization (CEDI) was investigated for removal and recovery of Cr(VI) from synthetic wastewater. Different anion exchange resins, including the gel strong-base resin, gel weak-base resin, macro-porous strong-base resin, and macro-porous weak-base resin, were examined. The gel strong-base resin was found to be the best one for use in CEDI. It was shown that CEDI could remove and recover Cr(VI) effectively from wastewater. After treatment, Cr(VI) concentration was reduced from initial 40-100 mg/L to 0.09-0.49 mg/L, and a pure chromic acid solution containing Cr(VI) as high as 6300 mg/L Cr(VI) was obtained. The current efficiency and energy consumption was 16.1-18.8%, and 4.1-7.3 kWh/mol Cr(VI), respectively.
机译:研究了连续电去离子(CEDI)从合成废水中去除和回收六价铬的方法。研究了不同的阴离子交换树脂,包括凝胶强碱树脂,凝胶弱碱树脂,大孔强碱树脂和大孔弱碱树脂。发现凝胶强碱树脂是用于CEDI的最好的树脂。结果表明,CEDI可以有效地去除和回收废水中的Cr(VI)。处理后,Cr(VI)的浓度从最初的40-100 mg / L降至0.09-0.49 mg / L,得到的纯铬酸溶液中的Cr(VI)高达6300 mg / L。 。电流效率和能耗分别为16.1-18.8%和4.1-7.3 kWh / mol Cr(VI)。

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