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林产化学与工业 ›› 2014, Vol. 34 ›› Issue (3): 65-72.doi: 10.3969/j.issn.0253-2417.2014.03.012

• 研究报告 • 上一篇    下一篇

纤维素C6位伯羟基的选择性氧化及用于双酚A的吸附研究

金紫薇, 许苗军, 李斌   

  1. 东北林业大学 理学院;黑龙江省阻燃材料分子设计与制备重点实验室, 黑龙江 哈尔滨 150040
  • 收稿日期:2013-11-13 出版日期:2014-06-25 发布日期:2014-06-25
  • 通讯作者: 李斌,教授,博士生导师,主要从事环境友好阻燃材料和生物质基材料研究;E-mail:libinzh62@163.com。 E-mail:libinzh62@163.com
  • 作者简介:金紫薇(1988- ),女,吉林吉林人,硕士生,主要从事环境友好阻燃材料分子设计与制备研究工作
  • 基金资助:
    国家自然科学基金资助项目(31370709);国家博士后科学基金资助项目(2013T60339)

Selective Oxidation of Primary Alcohol for Cellulose at C6 Position and Its Application in Adsorption of Bisphenol A

JIN Zi-wei, XU Miao-jun, LI Bin   

  1. Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials, College of Science, Northeast Forestry University, Harbin 150040, China
  • Received:2013-11-13 Online:2014-06-25 Published:2014-06-25

摘要: 采用HNO3/H3PO4-NaNO2氧化体系制备了氧化纤维素,通过红外光谱、固体 13C NMR 对其结构进行表征,用酸碱中和滴定法测定了产物的羧基含量。同时以氧化纤维素为吸附剂,研究了对水中内分泌干扰物双酚A(BPA)的吸附性能。结果表明:该氧化体系能很好的选择性氧化纤维素的C6位伯羟基,含羧基为20%。在298 K时,氧化纤维素对双酚A最大吸附量为12.67 mg/g,吸附平衡时间为30 min,平衡吸附量随双酚A浓度增加而增加;溶液接近中性及低温条件有利于吸附的进行,溶液中存在电解质则不利于吸附的进行。双酚A的吸附过程属于单分子层吸附,以化学吸附为主,符合准二级动力学方程和Langmuir吸附等温模型。

关键词: 氧化纤维素, 选择性氧化, 吸附, 双酚A, 动力学

Abstract: The oxidized cellulose (OC) was prepared by HNO3/H3PO4-NaNO2 oxidation system. The structure of OC was characterized by FT-IR spectroscopy and solid-state 13C NMR, and the carboxyl content was determined by acid-base titration method in present study. Meanwhile, the prepared OC was used as adsorbent and its adsorption properties for bisphenol A (BPA) were investigated. The results revealed that the C6 primary hydroxyl groups of cellulose were selectively oxidized to carboxyl groups by this oxidation system, and the carboxyl content was about 20%. The adsorption equilibrium time was about 30 min at 298 K, and the maximum adsorption capacity (qm) of OC for BPA was 12.67 mg/g. The adsorption capacity increased with the increase of initial BPA concentration. Neutral condition and low temperature were benificial for adsorption, but the presence of electrolytes in the solution was negative for the adsorption of BPA. The adsorption of BPA on OC was considered as a monolayer adsorption and chemisorption process.The adsorption kinetics followed the second-order equation. Langmuir model fitted the equilibrium data better than the Freundlich isotherm.

Key words: oxidized cellulose, selective oxidation, adsorption, bisphenol A, kinetics

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