Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan
作者机构：Green Intelligence Environmental SchoolYangtze Normal UniversityChongqing 408100China State Key Joint Laboratory of Environment Simulation and Pollution Control(SKJLESPC)Beijing Key Laboratory for Emerging Organic Contaminants Control(BKLEOC)School of EnvironmentTsinghua UniversityBeijing 100084China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2021年第15卷第6期
页 面：353-366页
核心收录：
学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：financially supported by the Major Science and Technology Program for Water Pollution Control and Treatment in China(No.2017ZX07202003) the National Key Research and Development Program of China(No.2018YFC1803100)
主 题：Chitosan High energy ball milling Mechanochemistry Oxidation
摘 要：Oxidation has been profitably utilized to improve some properties of ***,only solventbased oxidation procedures have been proposed so far,which are hardly feasible at industrial scale in an economic way because of product recovery *** this study,a solvent-free,rapid,and effective oxidation method is *** is based on direct solid-state reaction between chitosan and oxidant powder in a mechanochemical *** prove that by short high energy ball milling(3 h)it is possible to achieve diverse physicochemical modifications employing different *** from polysaccharidic chain shortening,persulfate provokes high amorphization and induces formation of ketonic groups;percarbonate heightens deacetylation degree,preserving in part crystallinity;calcium peroxide merely deprotonates amino groups and increases amorphization *** tests with the azo-dye reactive red 2 show that adsorption capacity of chitosan co-milled with persulfate(974 mg/g milled product),which is the best performing adsorbent,is twice that of pristine chitosan,while adsorption rate is outstandingly boosted(125 times).
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