理解壳聚糖与离子液体之间的相互作用，用于吸附钯。
Comprehending the interaction between chitosan and ionic liquid for the adsorption of palladium.
机构信息
Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R. R. Dist, 500 078 Hyderabad, India.
Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R. R. Dist, 500 078 Hyderabad, India.
出版信息
Int J Biol Macromol. 2015 Jan;72:633-9. doi: 10.1016/j.ijbiomac.2014.09.002. Epub 2014 Sep 16.
Biopolymers and ionic liquids are of prime importance in numerous applications. Recovery of industrially important noble metals such as palladium is of paramount significance considering their diverse applications. The main idea behind this work was to develop an effective strategy involving the impregnation of Aliquat-336 (ionic liquid) onto chitosan as a novel adsorbent for the adsorption of Pd(II). The analytical characterization was systematically done through FT-IR, XRD, SEM and EDX analysis. The interaction of the amino and hydroxyl functional groups in chitosan with the cationic nitrogen in the ionic liquid could be established through the above characterization. Several key parameters such as pH influence, amount of adsorbent, isotherms, kinetics and thermodynamic studies were also studied in detail for the adsorption of palladium. The effectiveness of adsorption was observed between pH 3.5-4.0 with 50 mL of 120 mg L(-1) Pd(II) solution giving a commendable monolayer adsorption capacity of 187.61 mg g(-1).
生物聚合物和离子液体在许多应用中都具有重要意义。考虑到它们的多种应用，回收工业上重要的贵金属如钯就显得尤为重要。这项工作的主要思路是开发一种有效的策略，即将 Aliquat-336（离子液体）浸渍到壳聚糖上，作为一种新型吸附剂，用于吸附 Pd(II)。通过 FT-IR、XRD、SEM 和 EDX 分析对其进行了系统的分析表征。壳聚糖中的氨基和羟基官能团与离子液体中的阳离子氮之间的相互作用可以通过上述表征来确定。还详细研究了吸附钯的几个关键参数，如 pH 影响、吸附剂用量、等温线、动力学和热力学研究。吸附的有效性在 pH 3.5-4.0 之间观察到，用 50 mL 120 mg L(-1) 的 Pd(II)溶液，可得到令人称赞的单层吸附容量为 187.61 mg g(-1)。
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