Selective degradation of lignin and elimination of HO radicals in pulps by O<Subscript>3</Subscript> and UV laser flash irradiation期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Selective degradation of lignin and elimination of HO radicals in pulps by O3 and UV laser flash irradiation

Authors:	Lin?Lu? author-information" > author-information__contact u-icon-before" > mailto:lclulin@scut.edu.cn" title=" lclulin@scut.edu.cn" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,Zhou?Xiantao,Qiu?Yugui

Affiliation:	(1) State Key Laboratory of Pulp and Paper Engineering, College of Environment and Paper engineering, South China University of Technology, 510640 Guangzhou, China

Abstract:	HO^. radical is an aggressive reagent to abstract hydrogen from diverse substitutes and lead them to degradation, however, in reaction of active oxygen species with lignins, complex phenolic polymers, in dispersed lignocellulose such as pulp for environment-benign delignification, HO^. radicals should be eliminated as more as possible to prevent cellulose from unfavorably concomitant degradation. A reaction system of O₃ is constructed under UV laser flash irradiation, and HO^. radicals are controlled efficiently by it. A new mechanism is proposed, for the first time, that O^. radicals generated from reaction of O₃ with UV laser flash irradiation might be the contributor to scavenge HO^. radicals.

Keywords:	UV laser O₃ bleaching selective degradation of lignins
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