Luo Lu, Wu Xi, Li Zeliang, Zhou Yalan, Chen Tingting, Fan Mizi, Zhao Weigang
College of Material Engineering, Fujian Agriculture and Forestry University, 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China.
College of Engineering Design and Physical Sciences, Brunel University, Uxbridge UB8 3PH, UK.
R Soc Open Sci. 2019 Sep 11;6(9):190523. doi: 10.1098/rsos.190523. eCollection 2019 Sep.
Activated carbon (AC) was successfully prepared from low-cost forestry fir bark (FB) waste using KOH activation method. Morphology and texture properties of ACFB were studied by scanning and high-resolution transmission electron microscopies (SEM and HRTEM), respectively. The resulting fir bark-based activated carbon (ACFB) demonstrated high surface area (1552 m g) and pore volume (0.84 cm g), both of which reflect excellent potential adsorption properties of ACFB towards methylene blue (MB). The effect of various factors, such as pH, initial concentration, adsorbent content as well as adsorption duration, was studied individually. Adsorption isotherms of MB were fitted using all three nonlinear models (Freundlich, Langmuir and Tempkin). The best fitting of MB adsorption results was obtained using Freundlich and Temkin. Experimental results showed that kinetics of MB adsorption by our ACFB adsorbent followed pseudo-second-order model. The maximum adsorption capacity obtained was 330 mg g, which indicated that FB is an excellent raw material for low-cost production of AC suitable for cationic dye removal.
采用KOH活化法成功地从低成本的林业杉木树皮（FB）废料中制备出活性炭（AC）。分别通过扫描电子显微镜和高分辨率透射电子显微镜（SEM和HRTEM）研究了ACFB的形态和织构性质。所得的杉木树皮基活性炭（ACFB）具有高比表面积（1552 m²/g）和孔容（0.84 cm³/g），这两者均反映出ACFB对亚甲基蓝（MB）具有优异的潜在吸附性能。分别研究了各种因素，如pH值、初始浓度、吸附剂含量以及吸附持续时间的影响。使用所有三种非线性模型（Freundlich、Langmuir和Tempkin）对MB的吸附等温线进行拟合。使用Freundlich和Temkin模型对MB吸附结果的拟合效果最佳。实验结果表明，我们的ACFB吸附剂对MB的吸附动力学遵循准二级模型。获得的最大吸附容量为330 mg/g，这表明FB是低成本生产适用于去除阳离子染料的AC的优良原料。
