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Preparation of Cross-linked Chitosan with Functional Ionic Liquids and Its adsorption Equilibrium of Cu(Ⅱ)ion

机译:功能性离子液体交联壳聚糖的制备及其对Cu(Ⅱ)离子的吸附平衡

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1.Introduction The presence of heavy metal ions from industrial waste waters, fertilizer, metal fabrication, paints, pigments, batteries, etc. Has endangered public health and the environment greatly. Many methods such as ion exchange, precipitation, adsorption, and membrane processes have been used for the removal of these toxic metal ions [1]. Of all the adsorbents, chitosan has proved to be an effective one to removal the heavy metal ions due to its large number of flee amino groups [2]. However, chitosan is soluble in dilute acidic solutions, which have limited its application in this field. Therefore, various physical and chemical modifications have been developed to avoid this disadvantage. The most useful way is to prepare cross-linked chitosan[3]. Herein, Cross-linked chitosan with functional ionic liquids (CCTS-FILs) via the homogeneous reaction in aqueous acetic acid solution was synthesized for the first time, and its adsorption characteristics on Cu (Ⅱ) ions were also investigated. The results show that the new adsorbent is effective for the removal of Cu (Ⅱ) and its adsorption capacity is 68.5 mg/g.
机译:1.简介工业废水,肥料,金属制品,油漆,颜料,电池等中存在的重金属离子极大地危害了公众健康和环境。许多方法,例如离子交换,沉淀,吸附和膜工艺已用于去除这些有毒金属离子[1]。在所有的吸附剂中,壳聚糖由于其大量的逃逸氨基而被证明是去除重金属离子的有效方法[2]。但是,壳聚糖可溶于稀酸性溶液,这限制了它在该领域的应用。因此,已经开发出各种物理和化学修饰来避免该缺点。最有用的方法是制备交联的壳聚糖[3]。本文首次通过乙酸水溶液中的均相反应,合成了具有功能离子液体的交联壳聚糖(CCTS-FILs),并研究了其在Cu(Ⅱ)离子上的吸附特性。结果表明,该新型吸附剂能有效去除Cu(Ⅱ),吸附量为68.5 mg / g。

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