Adsorption of manganese(II) ions by EDTA-treated activated carbons

Ameena Y. Khan, David W. Mazyck

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The adsorption of manganese(II) ions from aqueous solution onto three different granular activated carbons treated with ethylenediamine tetraacetic acid (EDTA) and its sodium salt was investigated. Characterization of the chelate-treated carbons showed that EDTA altered the physical and chemical properties of the sorbents relative to their untreated counterparts. Furthermore, the modified sorbents exhibited a heightened capacity towards the adsorption of Mn(II) ions from aqueous media. Manganese(II) ion removal increased from 0 to 6.5 mg/g for the lignite coal-based sorbent, from 3.5 to 14.7 mg/g for the wood-based sorbent and from 1.3 to 7.9 mg/g for the bituminous coal-based sorbent. The increased removal is attributed, in part, to the creation of Lewis base sites that participate in covalent interactions and hydrolysis reactions.

Original languageEnglish (US)
Pages (from-to)167-175
Number of pages9
JournalAdsorption Science and Technology
Issue number2
StatePublished - Mar 2009

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Surfaces and Interfaces


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