期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 17, 页码 8247-8252出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.06.014
关键词
Bio-char; Pyrolysis; Hydrogen binding; Phenol removal; Retention time
资金
- National Natural Science Foundation of China [50978242]
- National Water Project [2009ZX07528-006-01-02]
- Fundamental Research Funds for the Central Universities [WK2060190007]
Bio-chars with high adsorption capacity derived from rice-husks and corncobs were prepared at different retention times (RTs) in a pyrolysis reactor. At a fixed pyrolysis temperature, the pyrolysis RT is a key factor influencing the surface areas and functional group contents of the bin-chars, and further influencing their adsorption capacities. The results indicate that the bio-char prepared at RT of 1.6 s exhibits a higher phenol adsorption capacity (589 mg g(-1)) than other bio-chars and many activated carbons reported in the literature. An adsorption mechanism based on acid-base interaction and hydrogen binding between phenol and the functional groups was proposed to elucidate the adsorption process. An economic evaluation of the use of bio-chars as adsorbents was made. (C) 2011 Elsevier Ltd. All rights reserved.
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