吸附
甲基橙
傅里叶变换红外光谱
水溶液
朗缪尔吸附模型
壳聚糖
化学
核化学
蒙脱石
单层
丹宁
朗缪尔
材料科学
化学工程
有机化学
光催化
生物化学
食品科学
工程类
催化作用
作者
Nadia Tahari,Pedro L. de Hoyos-Martínez,Nagore Izaguirre,H. Nefzi,Manef Abderrabba,Sameh Ayadi,Jalel Labidi
标识
DOI:10.1016/j.ijbiomac.2022.04.231
摘要
A series of novel chitosan/tannin/montmorillonite (Cs/Tn/MMT) films were synthesised by loading different (from 0.2 to 0.5 wt%) and MMT (from 0.5 to 1.5 wt%) ratios, to be used as promising low-cost biosorbents for methyl orange (MO) removal from aqueous media. The prepared films were characterised using different techniques such as x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), water contact angle, optical properties, colourimetric measurement, porosity, swelling and thickness. The effects of various parameters, i.e. initial MO concentration, adsorbent dose, pH and temperature, were studied. The Cs/Tn0.2/MMT1 film showed a high removal efficiency of 95.62% and maximum adsorption capacity of 57.37 mg/g under the optimum adsorption conditions (initial methyl orange concentration 60 mg/L, pH 7 and 25 °C). The adsorption kinetic followed the pseudo second order kinetic model and the experimental data were a good fit for the Langmuir isotherm indicating a homogeneous and monolayer adsorption process. The thermodynamic parameters suggested physical adsorption and exothermic behaviour. Consequently, Cs/Tn/MMT films showed effective potential for the uptake of anionic dyes.
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