Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (12): 1-5.doi: 10.3969/j.issn.1000-565X.2013.12.001

• Chemistry,Chemical & Energy Engineering •     Next Articles

Effect of pH Value on Cellulase Adsorption on Wheat Straw Alkaline Lignin

Lou Hong- ming1,2 Li Xiu- li1 Wang Meng- xia1 Qiu Xue- qing1,2 Yang Dong- jie1 Deng Yong- hong1   

  1. 1.School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-08-21 Revised:2013-09-30 Online:2013-12-25 Published:2013-11-19
  • Contact: 邱学青(1965-)，男，教授，博士生导师，主要从事木质素的资源化利用研究 E-mail:cexqqiu@scut.edu.cn
  • About author:楼宏铭(1975-)，男，博士 副研究员，主要从事木质素资源化利用和木质纤维素糖化的研究．E-mail:cehmlou@scut．edu．cn
  • Supported by:

    国家国际科技合作专项(2013DFA41670);国家自然科学基金资助项目(21376100);国家杰出青年科学基金资助项目(20925622)

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Abstract:

Quartz crystal microbalance was used to detect the adsorption capacity and configuration variation of cel-lulase on wheat straw alkaline lignin film,and the effect of pH value on the adsorption was investigated.The resultsindicate that (1) there exists electrostatic repulsion between cellulase and wheat straw alkaline lignin when the pHvalue ranges from 4.8 to 6.0; (2) the electrostatic repulsion becomes stronger and the cellulase adsorption on thelignin film becomes more unfirm at a higher pH value,thus loosening the adsorbed film and decreasing the adsorp-tion capacity; and (3) high pH value benefits the desorption of cellulase from wheat straw alkaline lignin film andits recovery.

Key words: cellulase, lignin, adsorption, desorption, quartz crystal microbalance

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