Comparisons of adsorbent cost for the removal of zinc (II) from aqueous solution by carbon nanotubes and activated carbon

Chungsying Lu*, Huantsung Chiu, Hsun-Ling Bai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The reversibility of Zn 2+ sorption onto single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) and powdered activated carbon (PAC) was investigated to evaluate their repeated availability performance in water treatment. Under the same conditions, the Zn 2+ sorption capacity of SWCNTs and MWCNTs was more than that of PAC and could be maintained after several cycles of water treatment and regeneration. A statistical analysis on the replacement cost of these adsorbents based on the best-fit regression of the measured equilibrium capacity of each water treatment cycle was also conducted. The results revealed that the SWCNTs and MWCNTs could be reused through a large number of water treatment cycles and thus appear cost-effective in spite of their high unit cost at the present time.

Original languageEnglish
Pages (from-to)1647-1652
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume7
Issue number4-5
DOIs
StatePublished - 1 Apr 2007

Keywords

  • Carbon nanotubes
  • Cost-effective analysis
  • Desorption
  • Powdered activated carbon
  • Sorption
  • Zinc

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