基于改性壳聚糖的新型水凝胶作为金属生物吸附剂。
New hydrogels based on modified chitosan as metal biosorbent agents.
机构信息
Department of Chemistry, Faculty of Women, Ain Shams University, Heliopolis 11757, Cairo, Egypt.
Department of Chemistry, Faculty of Women, Ain Shams University, Heliopolis 11757, Cairo, Egypt.
出版信息
Int J Biol Macromol. 2014 Mar;64:328-33. doi: 10.1016/j.ijbiomac.2013.12.022. Epub 2013 Dec 20.
In this study, two new green biodegradable hydrogels (A1, A2) based on modified chitosan by dialdehydes were prepared via reaction of chitosan with [4,4'-diformyl-α-ω-diphenoxy-ethane or 4,4'-diformyl-2,2'-dimethoxy-α-ω-diphenoxy-ethane] under different reaction conditions. Characterization techniques were applied to the prepared hydrogels as FTIR, TGA, SEM, and X-ray. The efficiency of adsorption of Cu (II), Co (II), Zn (II), Hg (II) and Pb (II) ions from aqueous solution under different pH values were investigated. The results revealed that these hydrogels showed pH sensitive behavior in metal removal. Hydrogel (A2) showed the highest adsorption of Hg (II) ion at pH 5.
在这项研究中，通过在不同反应条件下使壳聚糖与[4,4'-二醛基-α-ω-二苯氧基乙烷或 4,4'-二醛基-2,2'-二甲氧基-α-ω-二苯氧基乙烷]反应，制备了两种基于改性壳聚糖的新型绿色可生物降解水凝胶（A1、A2）。采用 FTIR、TGA、SEM 和 X 射线等技术对所制备的水凝胶进行了表征。研究了不同 pH 值下从水溶液中吸附 Cu(II)、Co(II)、Zn(II)、Hg(II)和 Pb(II)离子的吸附效率。结果表明，这些水凝胶在去除金属方面表现出 pH 敏感性。水凝胶（A2）在 pH 5 时对 Hg(II)离子的吸附效果最佳。
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