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Uptake of Pb(II) Ions from Simulated Aqueous Solution via Nanochitosan

机译：通过纳米壳聚糖从模拟水溶液中吸收Pb（II）离子

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In this work, nanochitosan (NC) was prepared through ionic gelation using low molecular weight chitosan and maleic acid (MA). The synthesized NC was characterized by atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). During preparation, the particle size of the material depended on parameters such as concentration of chitosan and pH of the aqueous solution. After controlling the mentioned parameters, NC smaller than 100 nm was prepared. The chitosan and prepared NC were employed for the adsorption of Pb(II) from an aqueous solution in the form of a batch system. Among the sorption parameters, pH showed the strongest effect on the sorption process and removal of the maximum number of Pb(II) ions was obtained at pH value of 6. Pseudo-first-order and pseudo-second-order models were used to track the kinetics of the adsorption process. Langmuir and Freundlich’s isotherms were subjected to the absorption data to evaluate absorption capacity. NC proved to be an excellent adsorbent with a remarkable capacity to eliminate Pb(II) ions from aqueous solutions at multiple concentrations. The NC also showed better performance with a comparatively easier preparation process than in other reported work.
机译：在这项工作中，使用低分子量壳聚糖和马来酸（MA）通过离子凝胶化制备了纳米壳聚糖（NC）。通过原子力显微镜（AFM），傅立叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对合成的NC进行表征。在制备过程中，材料的粒度取决于参数，例如壳聚糖的浓度和水溶液的pH值。控制上述参数后，制备了小于100 nm的NC。壳聚糖和制备的NC用于以分批方式从水溶液中吸附Pb（II）。在吸附参数中，pH对吸附过程的影响最大，在pH值为6时，去除了最大数量的Pb（II）离子。使用伪一级和伪二级模型进行跟踪吸附过程的动力学。对Langmuir和Freundlich的等温线进行吸收数据评估吸收能力。 NC被证明是一种出色的吸附剂​​，具有从多种浓度的水溶液中消除Pb（II）离子的显着能力。与其他报告的工作相比，NC的准备过程相对更容易，表现出更好的性能。

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