Zhou Ying, Yu Jingang, Jiang Xinyu
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China E-mail:
Water Sci Technol. 2017 Jul;76(2):302-310. doi: 10.2166/wst.2017.198.
A novel multi-walled carbon nanotubes (MWCNTs) material functionalized with thiosemicarbazide was synthesized successfully and used to remove lead ions from aqueous solutions. The technologies of Fourier Transform Infrared Spectroscopy, scanning electron microscopy and thermal gravimetric analysis were used to characterize the structure and properties of thiosemicarbazide grafted MWCNTs. The adsorption conditions, such as pH, contact time and temperature, were investigated. The results showed pH affected the adsorption process greatly, and the adsorption process reached equilibrium within 60 min. The maximum adsorption capacity was 42.01 mg/g. The adsorption process fitted well with the pseudo-second-order kinetic model and the Langmuir model. The thermodynamic parameters indicated the adsorption process was endothermic and spontaneous in nature.
成功合成了一种用氨基硫脲功能化的新型多壁碳纳米管（MWCNTs）材料，并将其用于从水溶液中去除铅离子。采用傅里叶变换红外光谱、扫描电子显微镜和热重分析等技术对氨基硫脲接枝的MWCNTs的结构和性能进行了表征。研究了pH值、接触时间和温度等吸附条件。结果表明，pH值对吸附过程影响很大，吸附过程在60分钟内达到平衡。最大吸附容量为42.01mg/g。吸附过程符合准二级动力学模型和朗缪尔模型。热力学参数表明吸附过程是吸热的且本质上是自发的。
