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Highly efficient recovery of bioactive ingredients from solid waste of onions onto functionalized SWCNTs supported on amberlite nanocomposite
Iranian Polymer Journal ( IF 3.1 ) Pub Date : 2020-05-15 , DOI: 10.1007/s13726-020-00823-7
Zeynep Ciğeroğlu , Selin Şahin

Abstract

Preparation of single-walled carbon nanotubes (SWCNTs) with carboxylic (–COOH) acid was executed by functionalization with amine functional groups (–NH2). The obtained functionalized SWCNTs were supported by macroporous resin (amberlite XAD-7HP). The synthesized nanocomposite has been characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) methods. FTIR analysis indicates that functionalized SWCNTs supported onto the amberlite resin were synthesized successfully. The surface morphology of the nanomaterial was also successfully embedded into the amberlite of the functionalized SWCNTs. Huge solid residues of onions are produced as agricultural and food wastes each year. The related biowaste includes biologically active phenolic compounds which have positive effects with strong antioxidant properties on human health when properly isolated and concentrated. In the present research, functionalized SWCNTs have been utilized for the separation of bioactive phenolics from onion waste extracts. Equilibrium (Langmuir, Freundlich and Toth) and kinetic (pseudo-first order, pseudo-second order, intraparticular diffusion and Elovich) models have been applied for analysis and representation of data. Pseudo-second-order model is in good agreement with the experimental data. On the other hand, the equilibrium findings were represented best with Freundlich isotherm model. Additionally, thermodynamic indicators have also demonstrated that the current system is a spontaneous and exothermic chemisorption process.

Graphic abstract



中文翻译:

将洋葱固体废物中的生物活性成分高效回收到负载在琥珀石纳米复合材料上的功能化SWCNT上

摘要

通过用胺官能团(-NH 2官能化)来制备具有羧酸(–COOH)酸的单壁碳纳米管(SWCNT)。)。所得的官能化SWCNT被大孔树脂(Amberlite XAD-7HP)担载。合成的纳米复合材料已通过扫描电子显微镜(SEM)和傅立叶变换红外光谱(FTIR)方法进行了表征。FTIR分析表明,成功合成了负载在琥珀石树脂上的官能化SWCNT。纳米材料的表面形态也成功地嵌入到功能化SWCNT的镁铝石中。每年,洋葱的大量固体残留物会作为农业和食品废物而产生。相关的生物废物包括具有生物活性的酚类化合物,如果对其进行适当的分离和浓缩,它们会对人类健康产生积极的影响,并具有强大的抗氧化特性。在目前的研究中,功能化的SWCNT已用于从洋葱废物提取物中分离生物活性酚类。平衡模型(Langmuir,Freundlich和Toth)和动力学模型(拟一阶,拟二阶,颗粒内扩散和Elovich)已用于数据分析和表示。伪二阶模型与实验数据吻合良好。另一方面,Freundlich等温模型最能代表平衡结果。另外,热力学指标还表明,当前系统是自发的放热化学吸附过程。内扩散和Elovich模型已用于数据的分析和表示。伪二阶模型与实验数据吻合良好。另一方面,Freundlich等温线模型最能代表平衡结果。此外,热力学指标还表明,当前系统是自发的,放热的化学吸附过程。内扩散和Elovich模型已用于数据的分析和表示。伪二阶模型与实验数据吻合良好。另一方面,Freundlich等温模型最能代表平衡结果。另外,热力学指标还表明,当前系统是自发的放热化学吸附过程。

图形摘要

更新日期:2020-05-15
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