Pure water production and recovery of Ni2 + from dilute NiSO4 solution via improved electrodeionization (EDI) process were investigated. It was indicated that, with the feed water containing 50 mg L−1 Ni2 + , the dilute resistivity of the EDI could achieve 3 MΩ cm which gave a Ni2 + rejection more than 99.8% while the Ni2 + 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.
Recovery of nickel ions from simulated electroplating rinse water by electrodeionization process
H. Lu, J. Wang, B. Yan, S. Bu; Recovery of nickel ions from simulated electroplating rinse water by electrodeionization process. Water Sci Technol 1 February 2010; 61 (3): 729–735. doi: https://doi.org/10.2166/wst.2010.894
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