一种源自裙带菜（Undaria pinnatifida）的丰富多孔生物炭材料，对三种有机染料具有高吸附性能。
An abundant porous biochar material derived from wakame (Undaria pinnatifida) with high adsorption performance for three organic dyes.
机构信息
College of Naval Architecture and Mechanical-Electrical Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
出版信息
Bioresour Technol. 2020 Dec;318:124082. doi: 10.1016/j.biortech.2020.124082. Epub 2020 Sep 6.
In this study, an activated wakame biochar material (AWBM) was prepared by a one-step calcination and activation method, whose adsorption performances for methylene blue (MB), Rhodamine B (RB) and malachite green (MG) were also analyzed. The results showed AWBM was a mesoporous fluffy structure material with a higher specific surface (1156.25 m/g), exhibiting superior adsorption capacities for MB (841.64 mg/g), RB (533.77 mg/g) and MG (4066.96 mg/g), respectively. In addition, FT-IR analysis showed that AWBM possessed abundant active groups (such as -OH, -CO and -CH), further enhancing the adsorption efficiencies. The Langmuir model could better fit the three dyes adsorption isotherms process using AWBM, and the Pseudo-second-order model could better describe the adsorption kinetic experimental data. The thermodynamic analysis showed that the three dyes adsorption using AWBM was spontaneous endothermic reaction. This study suggests AWBM has enormous potential in the application of removing organic dyes from wastewater.
在这项研究中，通过一步煅烧和活化方法制备了一种活性裙带菜生物炭材料（AWBM），并分析了其对亚甲基蓝（MB）、罗丹明 B（RB）和孔雀石绿（MG）的吸附性能。结果表明，AWBM 是一种具有较高比表面积（1156.25 m/g）的中孔蓬松结构材料，对 MB（841.64 mg/g）、RB（533.77 mg/g）和 MG（4066.96 mg/g）分别具有优异的吸附能力。此外，FT-IR 分析表明，AWBM 具有丰富的活性基团（如-OH、-CO 和 -CH），进一步提高了吸附效率。AWBM 对三种染料吸附的 Langmuir 模型更能拟合吸附等温线过程，而准二级模型更能描述吸附动力学实验数据。热力学分析表明，AWBM 对三种染料的吸附是自发的吸热反应。这项研究表明，AWBM 在去除废水中有机染料方面具有巨大的应用潜力。
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