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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (6): 68-74.doi: 10.3969/j.issn.0253-2417.2019.06.009

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Effects of Two-stage Pretreatment on Enzymatic Hydrolysis of Poplar and Adsorption Performance of Lignin

Qiulu CHU1(),Xueyan CHEN1,Kai SONG2,*(),Jing WANG3,Xiaodong ZHANG1,Aiping SHI1   

  1. 1. School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
    2. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
    3. Guangdong Academy of Forestry, Guangzhou 510520, China
  • Received:2019-06-06 Online:2019-12-28 Published:2019-12-21
  • Contact: Kai SONG E-mail:Mina_chu@ujs.edu.cn;ksong@njfu.edu.cn
  • Supported by:


Effects on enzymatic hydrolysis of poplar and adsorption performance of lignin by two-stage pretreatment were established. The lignin content of raw biomass was 29.05%, while cellulose hydrolysis yield was only 15.24%. After steam explosion pretreatment, lignin content increased to 34.88%, and the acid group in biomass was 10.16 mmol/kg. As a result, the yield of cellulose by hydrolysis enhanced to 56.88%. However, lignin was hardly removed from biomass, which could not be recovered by acid precipitation to prepare lignin adsorbents.The lignin content decreased to 21.06% and 17.68%, incorporated with acid groups increased to 101.34 and 107.69 mmol/kg after alkaline oxidation-steam explosion and alkaline sulfonation-steam explosion pretreatment.And the yield of cellulose hydrolysis enhanced from 56.88% to 74.38% and 81.09%. Besides, around 50% of the original lignin was removed from biomass, which could be recovered as lignin adsorbents for Pb(Ⅱ) ions with adsorption capacity of 158.73 and 142.86 mg/g. The obtained results demonstrated that alkaline sulfonation-steam explosion pretreatment largely improved lignin removal and modification, which enhanced both the enzymatic hydrolysis of cellulose and the adsorption performance of lignin for holistic utilization of lignocellulosic biomass.

Key words: poplar, pretreatment, enzymatic hydrolysis, lignin, adsorption

CLC Number: