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首页> 外文期刊>Desalination and water treatment >Synthesis and characterization of N-succinyl-O-carboxymethyl chitosan for Pb(Ⅱ) ions adsorption
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Synthesis and characterization of N-succinyl-O-carboxymethyl chitosan for Pb(Ⅱ) ions adsorption

机译：N-琥珀酰-O-羧甲基壳聚糖的合成及其对Pb（Ⅱ）离子的吸附特性

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摘要

A novel N-succinyl-O-carboxymethyl chitosan (NSOC) was synthesized by a simple two-step method. O-carboxymethyl chitosan (OCMC) was prepared first by reacting chitosan with chloroacetic acid, and then the achieved OCMC was further succinylated by succinic anhydride in aqueous solution. The resultant NSOC was characterized by Fourier transform infrared (FTIR), elemental, H-1 nuclear magnetic resonance (H-1-NMR), scanning electron microscope (SEM) and X-ray diffraction pattern (XRD) analysis. The adsorption of Pb(II) was subsequently investigated. The adsorption isotherms obeyed the Langmuir equation, and the adsorption kinetics followed a pseudo-second-order model. FTIR and X-ray photoelectron spectra results showed that the excellent adsorption performance of NSOC for lead ions was attributed to the presence of large number of carboxyl groups.
机译：通过简单的两步法合成了一种新型的N-琥珀酰-O-羧甲基壳聚糖（NSOC）。首先通过使壳聚糖与氯乙酸反应来制备O-羧甲基壳聚糖（OCMC），然后将所获得的OCMC用琥珀酸酐在水溶液中进一步进行琥珀酰化。通过傅立叶变换红外（FTIR），元素，H-1核磁共振（H-1-NMR），扫描电子显微镜（SEM）和X射线衍射图（XRD）分析对所得NSOC进行表征。随后研究了Pb（II）的吸附。吸附等温线服从Langmuir方程，吸附动力学遵循伪二级模型。 FTIR和X射线光电子能谱结果表明，NSOC对铅离子的优异吸附性能归因于大量羧基的存在。

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