亚甲基蓝染料在石墨烯气凝胶和活性炭上吸附动力学的比较分析

E. Mkrtchyan, E. Neskoromnaya, I. Burakova, O. A. Ananyeva, N. A. Revyakina, A. Babkin, T. S. Kuznetsova, D. Kurnosov, A. Burakov
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引用次数: 5

摘要

研究了石墨烯气凝胶和活性炭对初始浓度为150 mg/l的水溶液中主要阳离子合成染料亚甲基蓝(MB)的吸附性能。利用扫描电子显微镜、热重法和拉曼光谱测定了新材料的特性。确定了石墨烯气凝胶的吸附量为420 mg/g,活性炭的吸附量为205 mg/g。石墨烯气凝胶存在下的饱和时间为7 min。实验数据采用拟一阶和拟二阶、Elovich和颗粒内扩散动力学模型进行处理。结果表明,石墨烯气凝胶是一种很有前途的吸附材料,用于提取分子有机污染物,即合成染料,显示出对目标污染物的高效去除。
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Comparative Analysis of the Adsorption Kinetics of the Methylene Blue Dye on Graphene Aerogel and Activated Coconut Carbon
The comparative adsorption capacity of graphene aerogel and activated coconut carbon in the process of removing the main cationic synthetic dye, methylene blue (MB), from aqueous solutions with an initial concentration of 150 mg/l was investigated. The characteristics of the new material have been determined using scanning electron microscopy, thermogravimetry, and Raman spectroscopy. The values of the adsorption capacity of graphene aerogel – 420 mg/g and activated carbon – 205 mg/g were established. The saturation time in the presence of graphene aerogel was 7 min. The experimental data were processed using kinetic models – pseudo-first and pseudo-second order, Elovich and intraparticle diffusion. According to the results obtained, graphene aerogel is a promising sorption material in the extraction of molecular organic pollutants, namely, synthetic dyes, demonstrating a high efficiency of the target pollutant removal.
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