College of Environmental Science and Engineering, Nankai University, Nankai district, 300071 Tianjin, China.
Water Sci Technol. 2010;61(3):729-35. doi: 10.2166/wst.2010.894.
Pure water production and recovery of Ni(2+) from dilute NiSO(4) solution via improved electrodeionization (EDI) process were investigated. It was indicated that, with the feed water containing 50 mg L(-1) Ni(2+), the dilute resistivity of the EDI could achieve 3 MOmega cm which gave a Ni(2+) rejection more than 99.8% while the Ni(2+) was concentrated as high as 1,583 mg L(-1) in the concentrate stream. The current efficiency was as high as 40% and the concentrate factor could reach 31.7. The experiment results demonstrated that, just in a single process, it was feasible to purifying and concentrating dilute nickel wastewater synchronously by the EDI technology.
采用改进后的电去离子（EDI）工艺生产纯水并从稀硫酸镍溶液中回收镍（Ⅱ）。结果表明，当进水含镍（Ⅱ）50mg/L 时，EDI 的出水稀释电阻可达 3MΩ·cm，镍（Ⅱ）的去除率大于 99.8%，同时浓缩液中镍（Ⅱ）的浓度高达 1583mg/L。电流效率高达 40%，浓缩倍数可达 31.7。实验结果表明，EDI 技术可在单一过程中同步实现稀镍废水的净化和浓缩。
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