Removal characteristics of copper by marine macro-algae-derived chars
- Removal characteristics of copper by marine macro-algae-derived chars
- 조혜정; 배기태; 전종기; 박성훈; 서동진; 박영권
- Macro-algae; Undaria pinnatifida; Pyrolysis; Char; Adsorption; Ion exchange; Cu
- Issue Date
- Chemical engineering journal
- VOL 217, 205-211
- 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.
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