期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 11, 页码 6536-6540出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.03.051
关键词
Old newsprint pulp; Deinking; Hemicelluase; Laccase mediator system; Fiber surface
资金
- Program for New Century Excellent Talents in University [NCET-08-0882]
- National Natural Science Foundation Of China [20706036, 30972327, 20576065]
- Natural Science Foundation of Shandong Province [Q2006B06]
- Excellent Young Researchers of Shandong Province [2006BS02017]
Deinking of old newsprint (ONP) by combining hemicellulase with laccase-mediator system (LMS) was investigated, and surface chemical composition and fiber morphology changes during the deinking process were studied by electron spectroscopy for chemical analysis (ESCA), contact angle (CA), attenuated total reflectance fourier transform infrared spectrometry (ATR-FTIR), fiber quality analyzer (FQA), and environmental scanning electronic microscopy (ESEM). Results showed that, compared to the pulp deinked with hemicellulase or LMS individually, effective residual ink concentration (ERIC) was lower for the hemicellulase/LMS-deinked pulp. This indicated that there is a synergistic deinking effect between hemicellulase and LMS. It was found that O/C ratio of the fiber surface increased and the surface coverage of lignin decreased during the hemicellulase/LMS deinking process. The contact angle of the hemicellulase/LMS-deinked pulp was lower than that of pulps deinked with each individual enzyme. ESEM observations showed that more fibrils appeared on the fiber surface due to synergistic treatment. (C) 2011 Elsevier Ltd. All rights reserved.
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