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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Fabrication of a novel hybrid biocomposite based on amino- thiocarbamate derivative of alginate/carboxymethyl chitosan/TiO2 for Ni(II) recovery
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Fabrication of a novel hybrid biocomposite based on amino- thiocarbamate derivative of alginate/carboxymethyl chitosan/TiO2 for Ni(II) recovery

机译：基于氨基氨基甲酸酯衍生物的新型杂交生物复合材料的氨基氨基甲酸酯/羧甲基壳聚糖/ TiO2的衍生物进行Ni（II）回收

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A novel hybrid biocomposite based on amino-thiocarbamate derivative of alginate, carboxymethyl chitosan and TiO2 (TiO2/TSC-CMC) was fabricated and characterized using Fourier transform Infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDX). The TiO2 frsc-cmc mass ratio (5.0-30.0%) was optimized and 3TiO(2)/TSC-CMC (hydrogel beads with TiO2 fISC-CMC mass ratio of 20.0%) was selected as the best sorbent for effective biosorption of Ni(II). Batch sorption experiments were conducted, instantaneous and equilibrium sorption capacities were investigated as function of pH, sorbent dose, initial metal concentration, contact time and temperature. Kinetic data could be well explained through pseudo second order rate equation (PSORE) depicting that the rate determining step involves the transfer of electron density from sorbent functional sites to central metal ion. Langmuir model fitted well with isothermal sorption data and maximum monolayer sorption capacity (q(m)) was computed as 172 mg/g at pH 6.0 and temperature 298 K. The values of thermodynamic parameters such as standard enthalpy change (16.94 kJ/mol) and standard Gibbs energy change (-18.67, -19.48, -20.57, and -21.38 kJ/mol) and standard entropy change (0.12 kJ/ mol . K) concluded that sorption process is endothermic, spontaneous and resulted with increase in randomness. Hence, 3TiO(2)/TSC-CMC was found efficient and reusable sorbent. (C) 2020 Elsevier B.V. All rights reserved.
机译：基于氨基硫代氨基甲酸酯衍生物的藻酸盐的新型复合生物复合材料，羧甲​​基脱乙酰壳多糖和TiO 2（二氧化钛/ TSC-CMC）被制造并使用傅里叶变换红外光谱（FTIR）表征，扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）。将TiO FRSC-CMC质量比（5.0-30.0％）进行了优化和3TiO（2）/ TSC-CMC（水凝胶珠粒与20.0％的TiO 2 FISC-CMC质量比）被选择作为用于镍的有效吸附（最好吸附剂II）。批次吸附实验进行的，瞬时的，平衡吸附能力进行了研究作为pH的函数，吸附剂剂量，初始金属浓度，接触时间和温度。动力学数据可能是通过良好伪二级速率方程（PSORE）描绘的速率确定步骤涉及电子密度从吸附剂功能位点到中心金属离子的转移进行说明。 Langmuir模型拟合良好等温吸附数据和最大单层吸附容量（Q（M））的计算为172毫克/克，在pH 6.0和温度298 K.热力学参数，如标准焓变的值（16.94千焦/摩尔）和标准吉布斯自由能变化（-18.67，-19.48，-20.57，-21.38和千焦/摩尔）和标准熵变（0.12千焦/摩尔。K）得出的结论是吸附过程是吸热的，自发的和导致与随机性增加。因此，3TiO（2）/ TSC-CMC发现高效和可重复使用的吸附剂。 （c）2020 Elsevier B.v.保留所有权利。

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