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首页> 外文期刊>RSC Advances >Highly efficient removal of methylene blue by a synthesized TiO2/montmorillonite-albumin nanocomposite: kinetic and isothermal analysis in water
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Highly efficient removal of methylene blue by a synthesized TiO2/montmorillonite-albumin nanocomposite: kinetic and isothermal analysis in water

机译：合成的TiO 2 /蒙脱土-白蛋白纳米复合材料高效去除亚甲基蓝：水中的动力学和等温分析

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Color removal from industrial effluents, especially in the textile and dyeing industries, is of great interest nowadays. In this research an experimental study was performed to investigate the efficiency of a TiO2/montmorillonite-albumin nanocomposite (TMAN), synthesized by a green process for the first time, in the removal of methylene blue (MB) from solutions. The as-synthesized TMAN was characterized using transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FT-IR) and powder X-ray diffraction (XRD). The results of the evaluations showed that the particle size of TMAN is about 21.79 ± 8.671 nm. The effect of different parameters such as initial concentration of MB, contact time, adsorbent dosage and pH were determined. The results showed that increasing the concentration of MB, adsorbent dosage, temperature and pH increases the removal efficiency of MB. The optimum for this process was reached at 3 h and the optimum pH for adsorption of MB with by TMAN was in the range of 7–11. The equilibrium data were also fitted to the Temkin, Langmuir and Freundlich equilibrium isotherm models. The results showed that the data fitted to Langmuir (R2 = 0.965) better compared with Freundlich (R2 = 0.936) and Temkin (R2 = 0.774) models. Maximum adsorption capacity was 18.18 mg g?1. Since industrial wastewaters have alkaline pH, TMAN can be used for the removal of dyes from industrial wastewaters and aqueous solutions.
机译：如今，特别是在纺织和印染工业中，从工业废水中脱色非常受关注。在这项研究中，进行了一项实验研究，以研究首次通过绿色工艺合成的TiO 2 /蒙脱土-白蛋白纳米复合材料（TMAN）的效率。从溶液中去除亚甲蓝（MB）。使用透射电子显微镜（TEM），傅立叶变换红外光谱（FT-IR）和粉末X射线衍射（XRD）对合成后的TMAN进行表征。评价结果表明，TMAN的粒径为约21.79±8.671nm。确定了不同参数的影响，例如MB的初始浓度，接触时间，吸附剂剂量和pH。结果表明，增加MB的浓度，吸附剂的用量，温度和pH值可以提高MB的去除效率。该工艺在3 h时达到了最佳状态，而TMAN吸附MB的最佳pH值为7-11。平衡数据也适用于Temkin，Langmuir和Freundlich平衡等温线模型。结果表明，与弗伦德里希（ R < small> 2 = 0.936）和Temkin（ R 2 = 0.774）模型。最大吸附容量为18.18 mg g ？1 。由于工业废水具有碱性pH值，因此TMAN可用于从工业废水和水溶液中去除染料。

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