Removal of Nickel Ions from Dilute Heavy Metal Solutions by Electrodeionization Process
The aim of the present work was to study the effect of properties of ion exchange membrane on separation performance of electrodeionization (EDI) process for removal of nickel ions from dilute heavy metal solutions. It was shown that the properties of ion exchange membrane had a significant effect on removal of nickel ions. With feed water containing nickel ions at the concentration of 55mg•L-1, the nickel ions concentration of dilute stream was lower than 0.5mg•L-1 and the nickel rejection was greater than 99% when using EDI membranes, while that was in the range of 2.48-3.55mg•L-1 with conventional heterogeneous ion exchange membranes. With optimum ion exchange material and operating conditions, EDI would be a very interesting and innovative technology for the treatment of dilute heavy metal solutions.
Yanguo Shi and Jinlong Zuo
H. X. Lu et al., "Removal of Nickel Ions from Dilute Heavy Metal Solutions by Electrodeionization Process", Advanced Materials Research, Vols. 183-185, pp. 580-584, 2011