巯基/氧化纤维素的制备及氯化体系中Ag(Ⅰ)的选择性吸附

doi:10.11944/j.issn.1000-0518.2017.01.160447

摘要/Abstract

摘要：

以废纸纤维素为原料,将纤维素氧化开环胺化后再进行巯基化反应,制备得到了一系列巯基修饰的纤维素类吸附剂。研究发现,无论是单一氯化体系还是高铜高镍氯化混合体系,基于氨基硫脲修饰戊二醛交联的氧化纤维素吸附剂对配阴离子AgCl43-的吸附效果最好,最大吸附量可达到171.16 mg/g。通过红外、X射线光电子能谱、热力学等技术手段分析探讨了其不同吸附效果的原因及该吸附剂对配阴离子Ag(Ⅰ)的静电引力吸附机理。

关键词: 银氯络离子, 纤维素, 氯化液, 选择性吸附

Abstract:

A series of adsorbents based on waste paper cellulose was prepared by oxidative ring-opening, amination and sulfhydrylation reaction. The adsorption capacity of the cellulose modified by amino thiourea/glutaraldehyde on coordination anion AgCl43- is the best in both the single system and the mixed system containing high levels of Cu(Ⅱ) and Ni(Ⅱ) chlorides. The maximum adsorption capacity of Ag(Ⅰ) can reach 171.16 mg/g. Reasons for different adsorption effects and the electrostatic adsorption mechanism of coordination anion Ag(Ⅰ) on the adsorbent were discussed based on IR, XPS and thermodynamics and so on, which can be ascribed to the electrostatic interaction between AgCl43- and the protonated thiol group of thiolmide group.

Key words: Ag(Ⅰ) chloride anion, cellulose, chlorination liquid, selective adsorption

张莹莹, 李心雨, 万丽, 张鹏, 娄振宁, 单炜军, 熊英. 巯基/氧化纤维素的制备及氯化体系中Ag(Ⅰ)的选择性吸附[J]. 应用化学, 2017, 34(1): 90-97.

ZHANG Yingying, LI Xinyu, WAN Li, ZHANG Peng, LOU Zhenning, SHAN Weijun, XIONG Ying. Preparation of Thiol/Oxidized Cellulose Adsorbent and Selective Adsorption of Ag(Ⅰ) in Chlorination System[J]. Chinese Journal of Applied Chemistry, 2017, 34(1): 90-97.

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