蔗渣纤维素纳米晶的提取、表征和甲基橙固存能力:实验和回归模型

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2021-09-01 DOI:10.22036/PCR.2021.260496.1863

L. Azeez, A. Adejumo, A. Oyedeji, S. A. Adebisi, H. Busari

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引用次数: 0

摘要

研究了酸水解法提取蔗渣纤维素纳米晶对甲基橙的吸附性能。采用扫描电镜(SEM)、能量色散x射线(EDX)和傅里叶变换红外光谱(FTIR)对提取的纳米晶体进行了表征。清晰的孔隙空间、主要的纳米颗粒范围(0.045 - 0.082µm)、较高的结晶度指数(1.09 - 1.21)、FTIR中1736和1429 cm-1处的峰消失以及较高的碳含量是更好地定义纤维素纳米晶体特性的参数。Langmuir等温线描述的纤维素纳米晶(432.17mg -1)的单层吸附量比Freundlich等温线描述的甘蔗渣(170.99 mg -1)的单层吸附量提高了两倍。两种吸附剂的吸附过程都是自发的，放热的，最好用准二级动力学来描述。多项式回归模型能较好地预测出最能描述不同批次吸附参数对MO去除影响的方程，其拟合性优于实验生成的数据。

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Extraction, Characterization and Methyl Orange Sequestration Capacity of Cellulose Nanocrystals Derived from Sugarcane Bagasse: Experimental and Regression Modelling

The adsorptive capacity of cellulose nanocrystals extracted from sugarcane bagasse using acid hydrolysis for methyl orange (MO) sequestration was investigated. The extracted nanocrystals were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and Fourier transform infra-red spectroscopy (FTIR). Well-defined pore spaces, predominant nano range of particles (0.045 – 0.082 µm), greater crystallinity index from 1.09 to 1.21, and disappearance of peaks at 1736 and 1429 cm-1 in FTIR in addition to higher carbon content are parameters that better-define the characteristics of cellulose nanocrystals. A Two-fold improvement in monolayer adsorption capacity was obtained for cellulose nanocrystals (432.17mgg-1) described by Langmuir isotherm over bagasse (170.99 mgg-1) described by Freundlich isotherm. Adsorption processes on both adsorbents were spontaneous, exothermic and best described by pseudo second-order kinetics. Polynomial regression models appropriately predicted equations that best describe the effects of different batch adsorption parameters on MO removal with better fittingness than experimentally generated data.

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

期刊介绍： The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.