Journal of Radiation Research and Radiation Processing ›› 2020, Vol. 38 ›› Issue (5): 26-33.doi: 10.11889/j.1000-3436.2020.rrj.38.050401

• RADIATION TECHNOLOGY APPLICATION • Previous Articles    

Fractionation processing of cellulose, lignin, and xylose from irradiated rice straw using formic acid

WU Xiaofen,QI Hui,CHEN Liang,ZHANG Yong,XU Yuanfang,DENG Ming,WANG Keqin()   

  1. Hunan Institute of Nuclear Agricultural Science and Space Mutation Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China
  • Received:2020-04-10 Revised:2020-05-18 Accepted:2020-05-18 Online:2020-10-20 Published:2020-10-19
  • Contact: WANG Keqin E-mail:wkq6412@163.com
  • About author:WU Xiaofen (female) was born in September 1987, and obtained her master’s degree from Huazhong Agricultural University in food science in 2012. Now she is an assistant professor, engaging in the application of irradiation technology in agricultural waste
  • Supported by:
    Special Project for the Construction of Innovative Provinces in Hunan(2019NK2031);Natural Science Foundation of Hunan Province(2018JJ2212)

Abstract:

The cellulose, lignin, and xylose in irradiated rice straw were fractionated by formic acid method, and the effects of absorbed dose, reaction temperature, and reaction time on fractionation efficiency were studied. The separated components were analyzed and characterized by Fourier transform infrared (FTIR) spectroscopy. The results showed that the cellulose and xylan were degraded into water-soluble oligosaccharides after irradiation. Rice straw irradiated with 400 kGy was treated with 88% formic acid at 100 ℃ for 3 h, the lignocellulose components obtained the best separation effect: the extraction rates of cellulose, lignin, and xylose were 83.22%, 46.18%, and 89.52%, respectively; the purities of cellulose and lignin were 61.26% and 86.19%, respectively; the concentrations of xylose and arabinose in the rice straw xylose component were 7.04 g/L and 0.77 g/L, respectively. FTIR spectroscopy showed that both cellulose and lignin fractionated from rice straw by formic acid were formylated.

Key words: Irradiation pretreatment, Rice straw, Lignocellulose, Formic acid fractionation

CLC Number: 

  • TL99