Recovery of nickel ions from simulated electroplating rinse water by electrodeionization process.
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.
Lu
H
H
College of Environmental Science and Engineering, Nankai University, Nankai district, 300071 Tianjin, China. huixialu@nankai.edu.cn
Wang
J
J
Yan
B
B
Bu
S
S
D000837:Anion Exchange Resins; D002411:Cation Exchange Resins; D002413:Cations, Divalent / Q000302:isolation & purification; D004563:Electrochemistry / Q000379:methods; D004595:Electroplating / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D009532:Nickel / Q000737:chemistry / Q000302:isolation & purification*; D010539:Permeability; D012996:Solutions; D013499:Surface Properties; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014867:Water; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
D000837:Anion Exchange Resins; D002411:Cation Exchange Resins; D002413:Cations, Divalent; D007477:Ions; D012996:Solutions; D014867:Water; C029938:nickel sulfate; D009532:Nickel