Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, 300222, China.
Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8603, Japan.
Environ Sci Pollut Res Int. 2018 Mar;25(8):7907-7915. doi: 10.1007/s11356-017-1079-7. Epub 2018 Jan 3.
Two kinds of pinewood sawdust activated carbon adsorbents were prepared by fast activation with HPO in a spouted bed, and the application in adsorption of copper ions was investigated. With only 3 min of activation time, the BET surface area of activated carbons reached 1537.5 m/g for impregnation mass ratio of HPO to sawdust at 1:1 and activation temperature of 500 °C (IR1-500), whereas it was 1750.7 m/g for the impregnation ratio at 4:1 and activation temperature of 800 °C (IR4-800). The pseudo second-order reaction kinetics well describes the experimental adsorption of copper ion in this study, indicating chemisorption dominated in the process. By the C spectrum, activated carbons from IR1-500 contained more carboxyl groups (-COOH) and carbonyl groups (C=O), which played an important role in copper ions adsorption. In addition, it was found that the P-containing groups (metaphosphates) also involved in the adsorption of copper ion.
两种松木屑活性炭吸附剂采用 HPO 在喷动床中快速活化制备，并考察了其在吸附铜离子中的应用。仅需 3 分钟的活化时间，当 HPO 与木屑的浸渍质量比为 1:1，活化温度为 500°C（IR1-500）时，活性炭的 BET 比表面积可达 1537.5 m/g，而当浸渍质量比为 4:1，活化温度为 800°C（IR4-800）时，BET 比表面积可达 1750.7 m/g。本研究中铜离子吸附的实验结果较好地符合准二级反应动力学模型，表明该过程以化学吸附为主。通过 C 谱分析可知，IR1-500 中含有更多的羧基（-COOH）和羰基（C=O），这对铜离子的吸附起着重要作用。此外，研究还发现含磷基团（偏磷酸盐）也参与了铜离子的吸附。
