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Chitosan-based green sorbent material for cations removal from an aqueous environment
Journal of Environmental Chemical Engineering ( IF 7.4 ) Pub Date : 2020-05-22 , DOI: 10.1016/j.jece.2020.104064
Nisar Ali , Adnan Khan , Sumeet Malik , Syed Badshah , Muhammad Bilal , Hafiz M.N. Iqbal

Herein, we report the development and characterization of a green sorbent material. For the said purpose, the chitosan’s capacity of cation sorption was enhanced by incorporating thiocarabamate group, which ultimately increases active sites for attracting the cationic species. The process was carried out by utilizing acrylomorpholine, carbon disulfide and chitosan in a single stage process. The product (CH-ATC) acquired was well characterized with 13C NMR (solid-form), FTIR spectroscopy, elemental investigation, thermogravimetic analysis and scanning electron microscopy. The novel product’s ability of sorption was evaluated by applying it to lead and copper solution. The modified chitosan (CH-ATC) exhibited greater sorption capacity of lead (1.58 mmol g−1) over raw chitosan when applied to aqueous solution based on Langmuir sorption isotherm. The new material also showed reasonable sorption capacity for copper (1.25 mmol g−1). The experimentally obtained results associated well to Langmuir model than Temkin and Freundlich isotherms using linear regression method. Different linearization of Langmuir model showed different error functions and isothermal parameters. The nonlinear regression analysis showed lower values of error functions as compared to linear regression analysis. The chitosan with thiocarbamate chain is outstanding material for selected cations decontamination form aqueous solution.



中文翻译:

基于壳聚糖的绿色吸附剂材料,用于从水性环境中去除阳离子

在此,我们报告了绿色吸附剂材料的开发和表征。为了上述目的,通过并入硫代氨基甲酸酯基团增强了壳聚糖的阳离子吸附能力,这最终增加了吸引阳离子物种的活性位点。该过程是通过在单步过程中利用丙烯酰吗啉,二硫化碳和壳聚糖进行的。获得的产物(CH-ATC)用13 C NMR(固体形式),FTIR光谱,元素研究,热重分析和扫描电子显微镜进行了很好的表征。通过将新产品应用于铅和铜溶液来评估其吸附能力。改性壳聚糖(CH-ATC)表现出更大的铅吸附能力(1.58 mmol g -1)在基于Langmuir吸附等温线的水溶液中施用时,将其置于未加工的壳聚糖上。新材料还显示出对铜的合理吸附能力(1.25 mmol g -1)。使用线性回归方法,与Temkin和Freundlich等温线相比,实验获得的结果与Langmuir模型具有很好的相关性。Langmuir模型的不同线性化显示出不同的误差函数和等温参数。与线性回归分析相比,非线性回归分析显示出较低的误差函数值。具有硫代氨基甲酸酯链的壳聚糖是用于从水溶液中选择的阳离子去污的杰出材料。

更新日期:2020-07-24
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