研究功能化 MCM-41 对瑞美素红染料吸附的潜力。
Investigating the potential of functionalized MCM-41 on adsorption of Remazol Red dye.
机构信息
Department of Chemistry, Federal University of Sergipe, Av. Marechal Rondon s/no, 49100-000 São Cristóvão, Sergipe, Brazil.
出版信息
Environ Sci Pollut Res Int. 2013 Jul;20(7):5028-35. doi: 10.1007/s11356-012-1346-6. Epub 2013 Jan 20.
The modification of MCM-41 was performed with 3-aminopropropyltrimethoxysilane. The structural order and textural properties of the synthesized materials were studied by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry/differential thermogravimetry, nitrogen adsorption, and desorption analysis. The adsorption capacity of NH2-MCM-41 was studied with Remazol Red dye. The following parameters were studied in the adsorption process: pH, temperature, adsorbent dosage, and initial concentration. The desorption process was studied in different concentrations of NaOH solutions. The Freundlich isotherm model was found to be fit with the equilibrium isotherm data. Kinetics of adsorption follows the modified Avrami rate equation. The maximum adsorption capacity was estimated to be 45.9 mg g(-1), with removal of the dye of 99.1%. The NH2-MCM-41 material exhibited high desorption capacity with 98.1%.
采用 3-氨丙基三甲氧基硅烷对 MCM-41 进行改性。通过 X 射线衍射、傅里叶变换红外光谱、热重/差热分析、氮气吸附和脱附分析研究了合成材料的结构有序性和织构性质。用 Remazol 红染料研究了 NH2-MCM-41 的吸附容量。在吸附过程中研究了以下参数：pH 值、温度、吸附剂用量和初始浓度。研究了不同浓度的 NaOH 溶液中的解吸过程。发现 Freundlich 等温线模型适合平衡等温线数据。吸附动力学遵循修正的 Avrami 速率方程。最大吸附容量估计为 45.9 mg/g，染料去除率为 99.1%。NH2-MCM-41 材料表现出高解吸容量，为 98.1%。
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