Adsorption and separation behavior of cobalt, nickel, and copper in nitrite medium by anion exchanger

Yuezhou Wei, Qiming Feng, Tsuyoshi Arai, Mikio Kumagai

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


To investigate the possibility of separation of metal ions in nitrite medium by anion exchange, adsorption and elution behavior of the three typical transition metals of Co(II), Ni(II) and Cu(II) in nitrite solution with a commercial anion exchanger, Amberlite IRA-900 and a novel silica-based anion exchanger, AR-01 with fine particle size has been studied. Furthermore, the separation behavior of these metal ions in nitrite solution was demonstrated by anion exchange chromatography. Co(II) and Cu(II) showed strong adsorption onto the anion exchangers in nitrite solution, while the adsorption of Ni(II) was very weak. The adsorption is considered to result from the formation of anionic nitro-complexes. Complete separation of Co(II) from Ni(II), and Cu(II) from Ni(II) was achieved in column experiments with a dilute nitric acid as eluent. Compared to IRA-900, AR-01 showed significantly faster adsorption and elution kinetics.

Original languageEnglish
Pages (from-to)561-573
Number of pages13
JournalSolvent Extraction and Ion Exchange
Issue number4-5
Publication statusPublished - 2002 Jul
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


Dive into the research topics of 'Adsorption and separation behavior of cobalt, nickel, and copper in nitrite medium by anion exchanger'. Together they form a unique fingerprint.

Cite this