期刊
BIORESOURCE TECHNOLOGY
卷 156, 期 -, 页码 368-371出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.01.044
关键词
Natural laccase mediator; Water-washed solution; Steam exploded corn straw; Nanofiltration; Successive organic solvent extraction
资金
- National Natural Science Foundation of China [21206176]
- National Basic Research Program of China [2011CB707401]
- National Key Project of Scientific and Technical Supporting Program of China [2011BAD22B02]
Artificially synthetic mediators of laccase had the limitation of high cost and possible toxicity. The separation of natural laccase mediators from water-washed solution (WWS) of steam exploded corn straw (SECS) was studied using nano-filtration and successive organic solvents extraction. Results indicated that the UV absorption intensity of nano-filtrated WWS was significantly enhanced. The UV absorption intensity of each extractive from WWS could be ranked as ether extractive (EE) > ethyl acetate extractive (EAE) > chloroform extractive (CE). Decoloration of crystal violet catalyzed by laccase/EE was higher than that by laccase/ABTS, which was 66.95% and 61.9% at 8 h, respectively. All the decoloration rates of malachite green at 60 min using EE, EAE and ABTS as mediator were both more than 80%. This research would benefit for broaden the source of laccase mediator and reduce the using cost of laccase/mediator system. (C) 2014 Elsevier Ltd. All rights reserved.
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