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http://dx.doi.org/10.5658/WOOD.2015.43.6.826

Antioxidant Activity of The Residue Generated During Pervaporation of Bioethanol Produced from Lignocellulosic Biomass  

Shin, Gyeong-Jin (Department of Forest Products and Technology, Chonnam National University)
Jeong, So-Yeon (Department of Forest Products and Technology, Chonnam National University)
Lee, Hong-Joo (Department of Bioenergy and Technology, Chonnam National University)
Lee, Jae-Won (Department of Forest Products and Technology, Chonnam National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.43, no.6, 2015 , pp. 826-837 More about this Journal
Abstract
In this study, we produced bioethanol from the original hydrolysate obtained during oxalic acid pretreatment of lignocellulosic biomass. The bioethanol was separated and concentrated by pervaporation and the residue after pervaporation was evaluated for its antioxidant activity. Xylose ($37.28g/{\ell}$) was the major product in the original hydrolysate. The original hydrolysate contained acetic acid, furfural and total phenolic compounds (TPC) as fermentation inhibitors. Acetic acid was removed by electrodialysis (ED), and $12.21g/{\ell}$ of bioethanol was produced from ED-treated hydrolysate. The TPC of ethyl acetate extracts from the residue obtained (OA-E) during pervaporation was 86.81 mg/100 g (extract). The $IC_{50}$ values of DPPH and ABTS radical scavenging activities, and reducing power of OA-E were $0.87mg/m{\ell}$, $0.85mg/m{\ell}$, and $0.59mg/m{\ell}$, respectively. Sugar degradation products and the phenolic compounds in OA-E were determined by GC-MS.
Keywords
lignocellulosic biomass; hydrolysate; bioethanol; pervaporation; antioxidant activity;
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