期刊
CHEMICAL ENGINEERING JOURNAL
卷 217, 期 -, 页码 205-211出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.11.123
关键词
Macro-algae; Undaria pinnatifida; Pyrolysis; Char; Adsorption; Ion exchange; Cu
资金
- 'National Agenda Program (NAP)' through the Korea Research Council of Fundamental Science and Technology (KRCF)/Korea Institute of Science and Technology (KIST)
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012R1A1B3003394]
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. (C) 2012 Elsevier B.V. All rights reserved.
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