Effect of metal additives on the physico-chemical characteristics of activated carbon exemplified by benzene and acetic acid adsorption

Hung Lung Chiang, C. P. Huang, P. C. Chiang, J. H. You

Research output: Contribution to journalJournal Article peer-review

38 Scopus citations

Abstract

The effects of treatment with inorganic salts exemplified by Mg (NO3)2 or Ba (NO3)2 on the physical-chemical characteristics of activated carbon were studied. Results indicate that the pore volume remains relatively unchanged upon salt treatment when the pore diameter ranges between 7 angstrom and 20 angstrom. Significant variation in pore volume was observed when pore diameter is less than 7 angstrom; generally, the pore volume of AC is greater than AC-Ba and AC-Mg. Major oxygen functional groups such as hydroxyl group for AC, carboxyl group for AC-Ba, and hydroxyl and carbonyl groups for AC-Mg were created. Regenerated at a temperature of 400°C, creates more pore volume especially when treated with Mg(NO3)2 with an increase of 13.0%. The regenerated AC-Mg exhibits the greatest acetic acid adsorption capacity among all activated carbons studies.

Original languageEnglish
Pages (from-to)1919-1928
Number of pages10
JournalCarbon
Volume37
Issue number12
DOIs
StatePublished - 1999
Externally publishedYes

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