比较活性炭和铁/铈改性活性炭对废水中亚甲基蓝的去除效果。
Comparison of activated carbon and iron/cerium modified activated carbon to remove methylene blue from wastewater.
机构信息
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, China; Yunnan Provincial Key Laboratory of Intensification Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, 650093, China; Yunnan Provincial Key Laboratory of Intensification Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, 650093, China; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
出版信息
J Environ Sci (China). 2018 Mar;65:92-102. doi: 10.1016/j.jes.2016.12.027. Epub 2017 Apr 3.
The methylene blue (MB) removal abilities of raw activated carbon and iron/cerium modified raw activated carbon (Fe-Ce-AC) by adsorption were researched and compared. The characteristics of Fe-Ce-AC were examined by N adsorption, zeta potential measurement, FTIR, Raman, XRD, XPS, SEM and EDS. After modification, the following phenomena occurred: The BET surface area, average pore diameter and total pore volume decreased; the degree of graphitization also decreased. Moreover, the presence of FeO led to Fe-Ce-AC having magnetic properties, which makes it easy to separate from dye wastewater in an external magnetic field and subsequently recycle. In addition, the equilibrium isotherms and kinetics of MB adsorption on raw activated carbon and Fe-Ce-AC were systematically examined. The equilibrium adsorption data indicated that the adsorption behavior followed the Langmuir isotherm, and the pseudo-second-order model matched the kinetic data well. Compared with raw activated carbon, the maximum monolayer adsorption capacity of Fe-Ce-AC increased by 27.31%. According to the experimental results, Fe-Ce-AC can be used as an effective adsorbent for the removal of MB from dye wastewater.
研究并比较了吸附法去除亚甲基蓝（MB）时，未改性的活性炭和铁/铈改性的活性炭（Fe-Ce-AC）的去除能力。通过 N 吸附、动电位测量、FTIR、Raman、XRD、XPS、SEM 和 EDS 对 Fe-Ce-AC 的特性进行了检测。改性后，出现了以下现象：BET 表面积、平均孔径和总孔体积减小；石墨化程度也降低了。此外，FeO 的存在使 Fe-Ce-AC 具有磁性，使其在外加磁场中易于从染料废水中分离并随后回收。此外，还系统地研究了 MB 在原始活性炭和 Fe-Ce-AC 上的吸附平衡等温线和动力学。平衡吸附数据表明，吸附行为符合 Langmuir 等温线，准二级动力学模型很好地拟合了动力学数据。与原始活性炭相比，Fe-Ce-AC 的最大单层吸附容量增加了 27.31%。根据实验结果，Fe-Ce-AC 可用作去除染料废水中 MB 的有效吸附剂。
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