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.
College of Environmental Science and Engineering, Nankai University, Nankai district, 300071 Tianjin, China. huixialu@nankai.edu.cn
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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