Removal characteristics of copper by marine macro-algae-derived chars

Hye Jung Cho, Kitae Baek, Jong Ki Jeon, Sung Hoon Park, Dong Jin Suh, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The char derived from the fast pyrolysis of macro-algae biomass, a brown alga Undaria pinnatifida, proved to be useful for the removal or recovery of copper from aqueous solutions. Even at a low dose of 0.1. g. char/L, a high adsorption capacity was obtained. Physical activation with steam enhanced the adsorption of Cu, but chemical activation with a KOH solution decreased the adsorption capacity. A pseudo-second order kinetic model was used to explain the adsorption kinetics. The physically-activated char showed a Langmuir type of isotherm, and had a maximum adsorption capacity of 125.85. mg. Cu/g. Based on the adsorption capacity, even at a low copper concentration, the char derived from the fast pyrolysis of U. pinnatifida is a valuable adsorbent for recovering copper from aqueous solutions.

Original languageEnglish
Pages (from-to)205-211
Number of pages7
JournalChemical Engineering Journal
Volume217
DOIs
StatePublished - 1 Feb 2013

Keywords

  • Adsorption
  • Char
  • Cu
  • Ion exchange
  • Macro-algae
  • Pyrolysis
  • Undaria pinnatifida

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