Purification of a diluted nickel solution containing nickel by a process combining ion exchange and electrodialysis

Dzyazko, Yuliya; Belyakov, V. N.

doi:10.1016/s0011-9164(04)00041-4

Cited by 79 publications

(34 citation statements)

References 12 publications

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“…The experimental setup involved an electrodialysis cell, three independent liquid lines, a power supply unit, and other measurements equipment (Dzyazko and Belyakov, 2004). Construction of the cell has the following scheme: anode compartment -composite ceramic membrane -center compartment -cation -exchange membranecathode compartment.…”

Section: Methodsmentioning

confidence: 99%

“…This process, called electro-deionization, involves two stages: (i) sorption of ions by an ion exchanger, and (ii) transport of sorbed ions through the packed bed of the ion exchanger influenced by potential gradient. Electro-deionization can be used for elimination of a number of heavy metal ions like Pb 2þ , Zn 2þ , Cd 2þ (Smara et al, 2005), Cu 2þ (Smara et al, 2005;Monzie et al, 2005), Ni 2þ (Spoor et al, 2002;Rozhdestvenska et al, 2006;Dzyazko et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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ELECTRO-DEIONIZATION OF Cr (VI)-CONTAINING SOLUTION. PART II: CHROMIUM TRANSPORT THROUGH INORGANIC ION-EXCHANGER AND COMPOSITE CERAMIC MEMBRANE

Dzyazko

Vasilyuk

Rozhdestvenskaya

et al. 2008

Chemical Engineering Communications

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Cr (VI) transport through a composite ceramic membrane containing an ionexchange component, namely xerogel of hydrated zirconium dioxide, was investigated. The diffusion coefficient of Cr (VI) species through the membrane, which has been determined under open circuit conditions, is 1.80 Â 10 À10 m 2 s À1. The transport number of Cr (VI) species through the ceramic membrane was found to rise with increasing voltage and reached 0.17 under ''over-limiting current'' conditions. On the other hand, the transport of chromate ions through hydrogel of hydrated zirconium dioxide becomes more intensive with a decrease in potential drop through the system involving ion-exchanger bed and ceramic membrane due to decrease in the membrane resistance. The diffusion coefficient of Cr (VI) ions in hydrogel of the inorganic ion exchanger was estimated as 4.36 Â 10 À12 m 2 s À1. A possibility of Cr (VI) removal from a weakly acidic diluted solution using an electro-deionization method was shown: the degree of solution purification was found to reach 50%. The transport of species is realized through both the solution and the ion exchanger.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ELECTRO-DEIONIZATION OF Cr (VI)-CONTAINING SOLUTION. PART II: CHROMIUM TRANSPORT THROUGH INORGANIC ION-EXCHANGER AND COMPOSITE CERAMIC MEMBRANE

Dzyazko

Vasilyuk

Rozhdestvenskaya

et al. 2008

Chemical Engineering Communications

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“…The experimental setup (Figure 1) consisted of electrodialysis cell, three independent liquid lines, power supplier and devices for measurements were described elsewhere (Dzyazko, 2005a;Dzyazko and Belyakov, 2004). The center compartment was separated from the electrode chambers, where smooth platinum sheets were placed, with homogeneous cation-exchange Nafion-117 (DuPont) and heterogeneous anionexchange AMI-7001 (Membrane International) membranes from the cathode and anode sides respectively.…”

Section: Cr (Vi) Migrationmentioning

confidence: 99%

“…SO 2À 4 and diffusion of Cr (VI) species through the solution and anion-exchange membrane to the anode compartment. A presence of a small amount of SO 2À 4 ions is a result of acid leakage from the anolyte (Dzyazko and Belyakov, 2004). The curves plotted in Figure 5 for hydrogel can be fitted with sigmoidal functions like:…”

Section: Cr (Vi) Transport Through Hzd Bed Under Applied Potentialmentioning

confidence: 99%

“…This technique was widely used later and explained in detail in a number of articles (Mahmoud et al, 2003;Dzyazko et al 2003Dzyazko et al , 2004Dzyazko, 2006;Rozhdestvenska et al, 2006). The method is based on definition of initial flux of species through the membrane: if ions are transported only through the ion exchanger, their apparent mobility can be found.…”

Section: Migration Of Cr (Vi) Speciesmentioning

confidence: 99%

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